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authorLinus Torvalds <torvalds@linux-foundation.org>2014-08-08 18:00:35 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-08 18:00:35 -0700
commit06b49ea43c0cdd22625883e555e45e66ef29e201 (patch)
tree9c72c88541e2bec5a95354504708a066fd8e50aa
parent664fb23070ae66a023250a83870a5bae7cd0efeb (diff)
parentbdc6e95e1273b5cef01590273c1a240c53ceeea0 (diff)
Merge tag 'gpio-v3.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO update from Linus Walleij: "This is the bulk of GPIO changes for the v3.17 development cycle, and this time we got a lot of action going on and it will continue: - The core GPIO library implementation has been split up in three different files: - gpiolib.c for the latest and greatest and shiny GPIO library code using GPIO descriptors only - gpiolib-legacy.c for the old integer number space API that we are phasing out gradually - gpiolib-sysfs.c for the sysfs interface that we are not entirely happy with, but has to live on for ABI compatibility - Add a flags argument to *gpiod_get* functions, with some backward-compatibility macros to ease transitions. We should have had the flags there from the beginning it seems, now we need to clean up the mess. There is a plan on how to move forward here devised by Alexandre Courbot and Mark Brown - Split off a special <linux/gpio/machine.h> header for the board gpio table registration, as per example from the regulator subsystem - Start to kill off the return value from gpiochip_remove() by removing the __must_check attribute and removing all checks inside the drivers/gpio directory. The rationale is: well what were we supposed to do if there is an error code? Not much: print an error message. And gpiolib already does that. So make this function return void eventually - Some cleanups of hairy gpiolib code, make some functions not to be used outside the library private and make sure they are not exported, remove gpiod_lock/unlock_as_irq() as the existing function is for driver-internal use and fine as it is, delete gpio_ensure_requested() as it is not meaningful anymore - Support the GPIOF_ACTIVE_LOW flag from gpio_request_one() function calls, which is logical since this is already supported when referencing GPIOs from e.g. device trees - Switch STMPE, intel-mid, lynxpoint and ACPI (!) to use the gpiolib irqchip helpers cutting down on GPIO irqchip boilerplate a bit more - New driver for the Zynq GPIO block - The usual incremental improvements around a bunch of drivers - Janitorial syntactic and semantic cleanups by Jingoo Han, and Rickard Strandqvist especially" * tag 'gpio-v3.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (37 commits) MAINTAINERS: update GPIO include files gpio: add missing includes in machine.h gpio: add flags argument to gpiod_get*() functions MAINTAINERS: Update Samsung pin control entry gpio / ACPI: Move event handling registration to gpiolib irqchip helpers gpio: lynxpoint: Convert to use gpiolib irqchip gpio: split gpiod board registration into machine header gpio: remove gpio_ensure_requested() gpio: remove useless check in gpiolib_sysfs_init() gpiolib: Export gpiochip_request_own_desc and gpiochip_free_own_desc gpio: move gpio_ensure_requested() into legacy C file gpio: remove gpiod_lock/unlock_as_irq() gpio: make gpiochip_get_desc() gpiolib-private gpio: simplify gpiochip_export() gpio: remove export of private of_get_named_gpio_flags() gpio: Add support for GPIOF_ACTIVE_LOW to gpio_request_one functions gpio: zynq: Clear pending interrupt when enabling a IRQ gpio: drop retval check enforcing from gpiochip_remove() gpio: remove all usage of gpio_remove retval in driver/gpio devicetree: Add Zynq GPIO devicetree bindings documentation ...
-rw-r--r--Documentation/devicetree/bindings/gpio/gpio-zynq.txt26
-rw-r--r--Documentation/gpio/board.txt2
-rw-r--r--Documentation/gpio/consumer.txt26
-rw-r--r--Documentation/gpio/driver.txt25
-rw-r--r--MAINTAINERS7
-rw-r--r--arch/arm/mach-at91/at91rm9200_devices.c2
-rw-r--r--arch/arm/mach-tegra/board-paz00.c2
-rw-r--r--arch/mips/jz4740/board-qi_lb60.c1
-rw-r--r--drivers/gpio/Kconfig10
-rw-r--r--drivers/gpio/Makefile3
-rw-r--r--drivers/gpio/devres.c40
-rw-r--r--drivers/gpio/gpio-74x164.c8
-rw-r--r--drivers/gpio/gpio-adnp.c9
-rw-r--r--drivers/gpio/gpio-adp5520.c8
-rw-r--r--drivers/gpio/gpio-adp5588.c6
-rw-r--r--drivers/gpio/gpio-amd8111.c3
-rw-r--r--drivers/gpio/gpio-arizona.c3
-rw-r--r--drivers/gpio/gpio-cs5535.c8
-rw-r--r--drivers/gpio/gpio-da9052.c3
-rw-r--r--drivers/gpio/gpio-da9055.c3
-rw-r--r--drivers/gpio/gpio-dwapb.c2
-rw-r--r--drivers/gpio/gpio-em.c5
-rw-r--r--drivers/gpio/gpio-f7188x.c18
-rw-r--r--drivers/gpio/gpio-generic.c3
-rw-r--r--drivers/gpio/gpio-grgpio.c4
-rw-r--r--drivers/gpio/gpio-ich.c9
-rw-r--r--drivers/gpio/gpio-intel-mid.c86
-rw-r--r--drivers/gpio/gpio-it8761e.c6
-rw-r--r--drivers/gpio/gpio-janz-ttl.c8
-rw-r--r--drivers/gpio/gpio-kempld.c3
-rw-r--r--drivers/gpio/gpio-lp3943.c3
-rw-r--r--drivers/gpio/gpio-lpc32xx.c2
-rw-r--r--drivers/gpio/gpio-lynxpoint.c98
-rw-r--r--drivers/gpio/gpio-max730x.c13
-rw-r--r--drivers/gpio/gpio-max732x.c7
-rw-r--r--drivers/gpio/gpio-mc33880.c11
-rw-r--r--drivers/gpio/gpio-mc9s08dz60.c3
-rw-r--r--drivers/gpio/gpio-mcp23s08.c26
-rw-r--r--drivers/gpio/gpio-ml-ioh.c8
-rw-r--r--drivers/gpio/gpio-msm-v2.c5
-rw-r--r--drivers/gpio/gpio-mxc.c2
-rw-r--r--drivers/gpio/gpio-octeon.c3
-rw-r--r--drivers/gpio/gpio-omap.c275
-rw-r--r--drivers/gpio/gpio-palmas.c3
-rw-r--r--drivers/gpio/gpio-pca953x.c7
-rw-r--r--drivers/gpio/gpio-pcf857x.c4
-rw-r--r--drivers/gpio/gpio-pch.c10
-rw-r--r--drivers/gpio/gpio-pxa.c7
-rw-r--r--drivers/gpio/gpio-rc5t583.c3
-rw-r--r--drivers/gpio/gpio-rcar.c9
-rw-r--r--drivers/gpio/gpio-rdc321x.c7
-rw-r--r--drivers/gpio/gpio-sch.c16
-rw-r--r--drivers/gpio/gpio-sch311x.c6
-rw-r--r--drivers/gpio/gpio-sodaville.c4
-rw-r--r--drivers/gpio/gpio-stmpe.c119
-rw-r--r--drivers/gpio/gpio-sx150x.c7
-rw-r--r--drivers/gpio/gpio-syscon.c3
-rw-r--r--drivers/gpio/gpio-tb10x.c5
-rw-r--r--drivers/gpio/gpio-tc3589x.c8
-rw-r--r--drivers/gpio/gpio-timberdale.c5
-rw-r--r--drivers/gpio/gpio-tps6586x.c3
-rw-r--r--drivers/gpio/gpio-tps65910.c3
-rw-r--r--drivers/gpio/gpio-tps65912.c3
-rw-r--r--drivers/gpio/gpio-ts5500.c6
-rw-r--r--drivers/gpio/gpio-twl4030.c6
-rw-r--r--drivers/gpio/gpio-twl6040.c3
-rw-r--r--drivers/gpio/gpio-ucb1400.c4
-rw-r--r--drivers/gpio/gpio-viperboard.c10
-rw-r--r--drivers/gpio/gpio-vr41xx.c8
-rw-r--r--drivers/gpio/gpio-vx855.c3
-rw-r--r--drivers/gpio/gpio-wm831x.c3
-rw-r--r--drivers/gpio/gpio-wm8350.c3
-rw-r--r--drivers/gpio/gpio-wm8994.c3
-rw-r--r--drivers/gpio/gpio-zynq.c692
-rw-r--r--drivers/gpio/gpiolib-acpi.c44
-rw-r--r--drivers/gpio/gpiolib-legacy.c102
-rw-r--r--drivers/gpio/gpiolib-of.c10
-rw-r--r--drivers/gpio/gpiolib-sysfs.c827
-rw-r--r--drivers/gpio/gpiolib.c1273
-rw-r--r--drivers/gpio/gpiolib.h105
-rw-r--r--include/asm-generic/gpio.h3
-rw-r--r--include/linux/gpio/consumer.h81
-rw-r--r--include/linux/gpio/driver.h66
-rw-r--r--include/linux/gpio/machine.h61
84 files changed, 2411 insertions, 1929 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-zynq.txt b/Documentation/devicetree/bindings/gpio/gpio-zynq.txt
new file mode 100644
index 000000000000..986371a4be2c
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-zynq.txt
@@ -0,0 +1,26 @@
+Xilinx Zynq GPIO controller Device Tree Bindings
+-------------------------------------------
+
+Required properties:
+- #gpio-cells : Should be two
+ - First cell is the GPIO line number
+ - Second cell is used to specify optional
+ parameters (unused)
+- compatible : Should be "xlnx,zynq-gpio-1.0"
+- clocks : Clock specifier (see clock bindings for details)
+- gpio-controller : Marks the device node as a GPIO controller.
+- interrupts : Interrupt specifier (see interrupt bindings for
+ details)
+- interrupt-parent : Must be core interrupt controller
+- reg : Address and length of the register set for the device
+
+Example:
+ gpio@e000a000 {
+ #gpio-cells = <2>;
+ compatible = "xlnx,zynq-gpio-1.0";
+ clocks = <&clkc 42>;
+ gpio-controller;
+ interrupt-parent = <&intc>;
+ interrupts = <0 20 4>;
+ reg = <0xe000a000 0x1000>;
+ };
diff --git a/Documentation/gpio/board.txt b/Documentation/gpio/board.txt
index ba169faad5c6..4452786225b8 100644
--- a/Documentation/gpio/board.txt
+++ b/Documentation/gpio/board.txt
@@ -60,7 +60,7 @@ Platform Data
Finally, GPIOs can be bound to devices and functions using platform data. Board
files that desire to do so need to include the following header:
- #include <linux/gpio/driver.h>
+ #include <linux/gpio/machine.h>
GPIOs are mapped by the means of tables of lookups, containing instances of the
gpiod_lookup structure. Two macros are defined to help declaring such mappings:
diff --git a/Documentation/gpio/consumer.txt b/Documentation/gpio/consumer.txt
index d8abfc31abbe..76546324e968 100644
--- a/Documentation/gpio/consumer.txt
+++ b/Documentation/gpio/consumer.txt
@@ -29,13 +29,24 @@ gpiod_get() functions. Like many other kernel subsystems, gpiod_get() takes the
device that will use the GPIO and the function the requested GPIO is supposed to
fulfill:
- struct gpio_desc *gpiod_get(struct device *dev, const char *con_id)
+ struct gpio_desc *gpiod_get(struct device *dev, const char *con_id,
+ enum gpiod_flags flags)
If a function is implemented by using several GPIOs together (e.g. a simple LED
device that displays digits), an additional index argument can be specified:
struct gpio_desc *gpiod_get_index(struct device *dev,
- const char *con_id, unsigned int idx)
+ const char *con_id, unsigned int idx,
+ enum gpiod_flags flags)
+
+The flags parameter is used to optionally specify a direction and initial value
+for the GPIO. Values can be:
+
+* GPIOD_ASIS or 0 to not initialize the GPIO at all. The direction must be set
+ later with one of the dedicated functions.
+* GPIOD_IN to initialize the GPIO as input.
+* GPIOD_OUT_LOW to initialize the GPIO as output with a value of 0.
+* GPIOD_OUT_HIGH to initialize the GPIO as output with a value of 1.
Both functions return either a valid GPIO descriptor, or an error code checkable
with IS_ERR() (they will never return a NULL pointer). -ENOENT will be returned
@@ -46,11 +57,13 @@ errors and an absence of GPIO for optional GPIO parameters.
Device-managed variants of these functions are also defined:
- struct gpio_desc *devm_gpiod_get(struct device *dev, const char *con_id)
+ struct gpio_desc *devm_gpiod_get(struct device *dev, const char *con_id,
+ enum gpiod_flags flags)
struct gpio_desc *devm_gpiod_get_index(struct device *dev,
const char *con_id,
- unsigned int idx)
+ unsigned int idx,
+ enum gpiod_flags flags)
A GPIO descriptor can be disposed of using the gpiod_put() function:
@@ -67,8 +80,9 @@ Using GPIOs
Setting Direction
-----------------
-The first thing a driver must do with a GPIO is setting its direction. This is
-done by invoking one of the gpiod_direction_*() functions:
+The first thing a driver must do with a GPIO is setting its direction. If no
+direction-setting flags have been given to gpiod_get*(), this is done by
+invoking one of the gpiod_direction_*() functions:
int gpiod_direction_input(struct gpio_desc *desc)
int gpiod_direction_output(struct gpio_desc *desc, int value)
diff --git a/Documentation/gpio/driver.txt b/Documentation/gpio/driver.txt
index fa9a0a8b3734..18790c237977 100644
--- a/Documentation/gpio/driver.txt
+++ b/Documentation/gpio/driver.txt
@@ -157,13 +157,34 @@ Locking IRQ usage
Input GPIOs can be used as IRQ signals. When this happens, a driver is requested
to mark the GPIO as being used as an IRQ:
- int gpiod_lock_as_irq(struct gpio_desc *desc)
+ int gpio_lock_as_irq(struct gpio_chip *chip, unsigned int offset)
This will prevent the use of non-irq related GPIO APIs until the GPIO IRQ lock
is released:
- void gpiod_unlock_as_irq(struct gpio_desc *desc)
+ void gpio_unlock_as_irq(struct gpio_chip *chip, unsigned int offset)
When implementing an irqchip inside a GPIO driver, these two functions should
typically be called in the .startup() and .shutdown() callbacks from the
irqchip.
+
+
+Requesting self-owned GPIO pins
+-------------------------------
+
+Sometimes it is useful to allow a GPIO chip driver to request its own GPIO
+descriptors through the gpiolib API. Using gpio_request() for this purpose
+does not help since it pins the module to the kernel forever (it calls
+try_module_get()). A GPIO driver can use the following functions instead
+to request and free descriptors without being pinned to the kernel forever.
+
+ int gpiochip_request_own_desc(struct gpio_desc *desc, const char *label)
+
+ void gpiochip_free_own_desc(struct gpio_desc *desc)
+
+Descriptors requested with gpiochip_request_own_desc() must be released with
+gpiochip_free_own_desc().
+
+These functions must be used with care since they do not affect module use
+count. Do not use the functions to request gpio descriptors not owned by the
+calling driver.
diff --git a/MAINTAINERS b/MAINTAINERS
index 3bb6df5d9094..a0abe7c1a8ea 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4031,7 +4031,8 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git
S: Maintained
F: Documentation/gpio/
F: drivers/gpio/
-F: include/linux/gpio*
+F: include/linux/gpio/
+F: include/linux/gpio.h
F: include/asm-generic/gpio.h
GRE DEMULTIPLEXER DRIVER
@@ -7002,9 +7003,7 @@ M: Thomas Abraham <thomas.abraham@linaro.org>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
L: linux-samsung-soc@vger.kernel.org (moderated for non-subscribers)
S: Maintained
-F: drivers/pinctrl/pinctrl-exynos.*
-F: drivers/pinctrl/pinctrl-s3c*
-F: drivers/pinctrl/pinctrl-samsung.*
+F: drivers/pinctrl/samsung/
PIN CONTROLLER - ST SPEAR
M: Viresh Kumar <viresh.linux@gmail.com>
diff --git a/arch/arm/mach-at91/at91rm9200_devices.c b/arch/arm/mach-at91/at91rm9200_devices.c
index 3f4bb58aea54..74f1eaf97801 100644
--- a/arch/arm/mach-at91/at91rm9200_devices.c
+++ b/arch/arm/mach-at91/at91rm9200_devices.c
@@ -15,7 +15,7 @@
#include <linux/dma-mapping.h>
#include <linux/gpio.h>
-#include <linux/gpio/driver.h>
+#include <linux/gpio/machine.h>
#include <linux/platform_device.h>
#include <linux/i2c-gpio.h>
diff --git a/arch/arm/mach-tegra/board-paz00.c b/arch/arm/mach-tegra/board-paz00.c
index bb4782a32713..fbe74c6806f3 100644
--- a/arch/arm/mach-tegra/board-paz00.c
+++ b/arch/arm/mach-tegra/board-paz00.c
@@ -17,7 +17,7 @@
*
*/
-#include <linux/gpio/driver.h>
+#include <linux/gpio/machine.h>
#include <linux/platform_device.h>
#include <linux/rfkill-gpio.h>
diff --git a/arch/mips/jz4740/board-qi_lb60.c b/arch/mips/jz4740/board-qi_lb60.c
index 088e92a79ae6..c454525e7695 100644
--- a/arch/mips/jz4740/board-qi_lb60.c
+++ b/arch/mips/jz4740/board-qi_lb60.c
@@ -15,6 +15,7 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/gpio.h>
+#include <linux/gpio/machine.h>
#include <linux/input.h>
#include <linux/gpio_keys.h>
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 4a065b45330f..9de1515e5808 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -340,6 +340,13 @@ config GPIO_XILINX
help
Say yes here to support the Xilinx FPGA GPIO device
+config GPIO_ZYNQ
+ tristate "Xilinx Zynq GPIO support"
+ depends on ARCH_ZYNQ
+ select GPIOLIB_IRQCHIP
+ help
+ Say yes here to support Xilinx Zynq GPIO controller.
+
config GPIO_XTENSA
bool "Xtensa GPIO32 support"
depends on XTENSA
@@ -423,7 +430,7 @@ config GPIO_GE_FPGA
config GPIO_LYNXPOINT
tristate "Intel Lynxpoint GPIO support"
depends on ACPI && X86
- select IRQ_DOMAIN
+ select GPIOLIB_IRQCHIP
help
driver for GPIO functionality on Intel Lynxpoint PCH chipset
Requires ACPI device enumeration code to set up a platform device.
@@ -586,6 +593,7 @@ config GPIO_SX150X
config GPIO_STMPE
bool "STMPE GPIOs"
depends on MFD_STMPE
+ select GPIOLIB_IRQCHIP
help
This enables support for the GPIOs found on the STMPE I/O
Expanders.
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index e18e9564b073..5d024e396622 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -4,7 +4,9 @@ ccflags-$(CONFIG_DEBUG_GPIO) += -DDEBUG
obj-$(CONFIG_GPIO_DEVRES) += devres.o
obj-$(CONFIG_GPIOLIB) += gpiolib.o
+obj-$(CONFIG_GPIOLIB) += gpiolib-legacy.o
obj-$(CONFIG_OF_GPIO) += gpiolib-of.o
+obj-$(CONFIG_GPIO_SYSFS) += gpiolib-sysfs.o
obj-$(CONFIG_GPIO_ACPI) += gpiolib-acpi.o
# Device drivers. Generally keep list sorted alphabetically
@@ -102,3 +104,4 @@ obj-$(CONFIG_GPIO_WM8994) += gpio-wm8994.o
obj-$(CONFIG_GPIO_XILINX) += gpio-xilinx.o
obj-$(CONFIG_GPIO_XTENSA) += gpio-xtensa.o
obj-$(CONFIG_GPIO_ZEVIO) += gpio-zevio.o
+obj-$(CONFIG_GPIO_ZYNQ) += gpio-zynq.o
diff --git a/drivers/gpio/devres.c b/drivers/gpio/devres.c
index 65978cf85f79..41b2f40578d5 100644
--- a/drivers/gpio/devres.c
+++ b/drivers/gpio/devres.c
@@ -39,47 +39,53 @@ static int devm_gpiod_match(struct device *dev, void *res, void *data)
* devm_gpiod_get - Resource-managed gpiod_get()
* @dev: GPIO consumer
* @con_id: function within the GPIO consumer
+ * @flags: optional GPIO initialization flags
*
* Managed gpiod_get(). GPIO descriptors returned from this function are
* automatically disposed on driver detach. See gpiod_get() for detailed
* information about behavior and return values.
*/
-struct gpio_desc *__must_check devm_gpiod_get(struct device *dev,
- const char *con_id)
+struct gpio_desc *__must_check __devm_gpiod_get(struct device *dev,
+ const char *con_id,
+ enum gpiod_flags flags)
{
- return devm_gpiod_get_index(dev, con_id, 0);
+ return devm_gpiod_get_index(dev, con_id, 0, flags);
}
-EXPORT_SYMBOL(devm_gpiod_get);
+EXPORT_SYMBOL(__devm_gpiod_get);
/**
* devm_gpiod_get_optional - Resource-managed gpiod_get_optional()
* @dev: GPIO consumer
* @con_id: function within the GPIO consumer
+ * @flags: optional GPIO initialization flags
*
* Managed gpiod_get_optional(). GPIO descriptors returned from this function
* are automatically disposed on driver detach. See gpiod_get_optional() for
* detailed information about behavior and return values.
*/
-struct gpio_desc *__must_check devm_gpiod_get_optional(struct device *dev,
- const char *con_id)
+struct gpio_desc *__must_check __devm_gpiod_get_optional(struct device *dev,
+ const char *con_id,
+ enum gpiod_flags flags)
{
- return devm_gpiod_get_index_optional(dev, con_id, 0);
+ return devm_gpiod_get_index_optional(dev, con_id, 0, flags);
}
-EXPORT_SYMBOL(devm_gpiod_get_optional);
+EXPORT_SYMBOL(__devm_gpiod_get_optional);
/**
* devm_gpiod_get_index - Resource-managed gpiod_get_index()
* @dev: GPIO consumer
* @con_id: function within the GPIO consumer
* @idx: index of the GPIO to obtain in the consumer
+ * @flags: optional GPIO initialization flags
*
* Managed gpiod_get_index(). GPIO descriptors returned from this function are
* automatically disposed on driver detach. See gpiod_get_index() for detailed
* information about behavior and return values.
*/
-struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev,
+struct gpio_desc *__must_check __devm_gpiod_get_index(struct device *dev,
const char *con_id,
- unsigned int idx)
+ unsigned int idx,
+ enum gpiod_flags flags)
{
struct gpio_desc **dr;
struct gpio_desc *desc;
@@ -89,7 +95,7 @@ struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev,
if (!dr)
return ERR_PTR(-ENOMEM);
- desc = gpiod_get_index(dev, con_id, idx);
+ desc = gpiod_get_index(dev, con_id, idx, flags);
if (IS_ERR(desc)) {
devres_free(dr);
return desc;
@@ -100,26 +106,28 @@ struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev,
return desc;
}
-EXPORT_SYMBOL(devm_gpiod_get_index);
+EXPORT_SYMBOL(__devm_gpiod_get_index);
/**
* devm_gpiod_get_index_optional - Resource-managed gpiod_get_index_optional()
* @dev: GPIO consumer
* @con_id: function within the GPIO consumer
* @index: index of the GPIO to obtain in the consumer
+ * @flags: optional GPIO initialization flags
*
* Managed gpiod_get_index_optional(). GPIO descriptors returned from this
* function are automatically disposed on driver detach. See
* gpiod_get_index_optional() for detailed information about behavior and
* return values.
*/
-struct gpio_desc *__must_check devm_gpiod_get_index_optional(struct device *dev,
+struct gpio_desc *__must_check __devm_gpiod_get_index_optional(struct device *dev,
const char *con_id,
- unsigned int index)
+ unsigned int index,
+ enum gpiod_flags flags)
{
struct gpio_desc *desc;
- desc = devm_gpiod_get_index(dev, con_id, index);
+ desc = devm_gpiod_get_index(dev, con_id, index, flags);
if (IS_ERR(desc)) {
if (PTR_ERR(desc) == -ENOENT)
return NULL;
@@ -127,7 +135,7 @@ struct gpio_desc *__must_check devm_gpiod_get_index_optional(struct device *dev,
return desc;
}
-EXPORT_SYMBOL(devm_gpiod_get_index_optional);
+EXPORT_SYMBOL(__devm_gpiod_get_index_optional);
/**
* devm_gpiod_put - Resource-managed gpiod_put()
diff --git a/drivers/gpio/gpio-74x164.c b/drivers/gpio/gpio-74x164.c
index e4ae29824c32..e3d968f751f1 100644
--- a/drivers/gpio/gpio-74x164.c
+++ b/drivers/gpio/gpio-74x164.c
@@ -167,13 +167,11 @@ exit_destroy:
static int gen_74x164_remove(struct spi_device *spi)
{
struct gen_74x164_chip *chip = spi_get_drvdata(spi);
- int ret;
- ret = gpiochip_remove(&chip->gpio_chip);
- if (!ret)
- mutex_destroy(&chip->lock);
+ gpiochip_remove(&chip->gpio_chip);
+ mutex_destroy(&chip->lock);
- return ret;
+ return 0;
}
static const struct of_device_id gen_74x164_dt_ids[] = {
diff --git a/drivers/gpio/gpio-adnp.c b/drivers/gpio/gpio-adnp.c
index b2239d678d01..416b2200d4f1 100644
--- a/drivers/gpio/gpio-adnp.c
+++ b/drivers/gpio/gpio-adnp.c
@@ -585,15 +585,8 @@ static int adnp_i2c_remove(struct i2c_client *client)
{
struct adnp *adnp = i2c_get_clientdata(client);
struct device_node *np = client->dev.of_node;
- int err;
-
- err = gpiochip_remove(&adnp->gpio);
- if (err < 0) {
- dev_err(&client->dev, "%s failed: %d\n", "gpiochip_remove()",
- err);
- return err;
- }
+ gpiochip_remove(&adnp->gpio);
if (of_find_property(np, "interrupt-controller", NULL))
adnp_irq_teardown(adnp);
diff --git a/drivers/gpio/gpio-adp5520.c b/drivers/gpio/gpio-adp5520.c
index f1ade8fa3218..b08bd169e568 100644
--- a/drivers/gpio/gpio-adp5520.c
+++ b/drivers/gpio/gpio-adp5520.c
@@ -167,15 +167,9 @@ err:
static int adp5520_gpio_remove(struct platform_device *pdev)
{
struct adp5520_gpio *dev;
- int ret;
dev = platform_get_drvdata(pdev);
- ret = gpiochip_remove(&dev->gpio_chip);
- if (ret) {
- dev_err(&pdev->dev, "%s failed, %d\n",
- "gpiochip_remove()", ret);
- return ret;
- }
+ gpiochip_remove(&dev->gpio_chip);
return 0;
}
diff --git a/drivers/gpio/gpio-adp5588.c b/drivers/gpio/gpio-adp5588.c
index ef19bc33f2bd..3beed6ea8c65 100644
--- a/drivers/gpio/gpio-adp5588.c
+++ b/drivers/gpio/gpio-adp5588.c
@@ -470,11 +470,7 @@ static int adp5588_gpio_remove(struct i2c_client *client)
if (dev->irq_base)
free_irq(dev->client->irq, dev);
- ret = gpiochip_remove(&dev->gpio_chip);
- if (ret) {
- dev_err(&client->dev, "gpiochip_remove failed %d\n", ret);
- return ret;
- }
+ gpiochip_remove(&dev->gpio_chip);
kfree(dev);
return 0;
diff --git a/drivers/gpio/gpio-amd8111.c b/drivers/gpio/gpio-amd8111.c
index 94e9992f8904..3c09f1a6872a 100644
--- a/drivers/gpio/gpio-amd8111.c
+++ b/drivers/gpio/gpio-amd8111.c
@@ -232,8 +232,7 @@ out:
static void __exit amd_gpio_exit(void)
{
- int err = gpiochip_remove(&gp.chip);
- WARN_ON(err);
+ gpiochip_remove(&gp.chip);
ioport_unmap(gp.pm);
release_region(gp.pmbase + PMBASE_OFFSET, PMBASE_SIZE);
}
diff --git a/drivers/gpio/gpio-arizona.c b/drivers/gpio/gpio-arizona.c
index 29bdff558981..fe369f5c7fa6 100644
--- a/drivers/gpio/gpio-arizona.c
+++ b/drivers/gpio/gpio-arizona.c
@@ -149,7 +149,8 @@ static int arizona_gpio_remove(struct platform_device *pdev)
{
struct arizona_gpio *arizona_gpio = platform_get_drvdata(pdev);
- return gpiochip_remove(&arizona_gpio->gpio_chip);
+ gpiochip_remove(&arizona_gpio->gpio_chip);
+ return 0;
}
static struct platform_driver arizona_gpio_driver = {
diff --git a/drivers/gpio/gpio-cs5535.c b/drivers/gpio/gpio-cs5535.c
index c0a3aeba6f21..92ec58fa9236 100644
--- a/drivers/gpio/gpio-cs5535.c
+++ b/drivers/gpio/gpio-cs5535.c
@@ -358,14 +358,8 @@ done:
static int cs5535_gpio_remove(struct platform_device *pdev)
{
struct resource *r;
- int err;
- err = gpiochip_remove(&cs5535_gpio_chip.chip);
- if (err) {
- /* uhh? */
- dev_err(&pdev->dev, "unable to remove gpio_chip?\n");
- return err;
- }
+ gpiochip_remove(&cs5535_gpio_chip.chip);
r = platform_get_resource(pdev, IORESOURCE_IO, 0);
release_region(r->start, resource_size(r));
diff --git a/drivers/gpio/gpio-da9052.c b/drivers/gpio/gpio-da9052.c
index 416cdf786b05..c5bccd4dec96 100644
--- a/drivers/gpio/gpio-da9052.c
+++ b/drivers/gpio/gpio-da9052.c
@@ -237,7 +237,8 @@ static int da9052_gpio_remove(struct platform_device *pdev)
{
struct da9052_gpio *gpio = platform_get_drvdata(pdev);
- return gpiochip_remove(&gpio->gp);
+ gpiochip_remove(&gpio->gp);
+ return 0;
}
static struct platform_driver da9052_gpio_driver = {
diff --git a/drivers/gpio/gpio-da9055.c b/drivers/gpio/gpio-da9055.c
index f992997bc301..9167c4331081 100644
--- a/drivers/gpio/gpio-da9055.c
+++ b/drivers/gpio/gpio-da9055.c
@@ -174,7 +174,8 @@ static int da9055_gpio_remove(struct platform_device *pdev)
{
struct da9055_gpio *gpio = platform_get_drvdata(pdev);
- return gpiochip_remove(&gpio->gp);
+ gpiochip_remove(&gpio->gp);
+ return 0;
}
static struct platform_driver da9055_gpio_driver = {
diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
index cd3b81435274..d6618a6e2399 100644
--- a/drivers/gpio/gpio-dwapb.c
+++ b/drivers/gpio/gpio-dwapb.c
@@ -359,7 +359,7 @@ static void dwapb_gpio_unregister(struct dwapb_gpio *gpio)
for (m = 0; m < gpio->nr_ports; ++m)
if (gpio->ports[m].is_registered)
- WARN_ON(gpiochip_remove(&gpio->ports[m].bgc.gc));
+ gpiochip_remove(&gpio->ports[m].bgc.gc);
}
static int dwapb_gpio_probe(struct platform_device *pdev)
diff --git a/drivers/gpio/gpio-em.c b/drivers/gpio/gpio-em.c
index cde36054c387..fe49ec3cdb7d 100644
--- a/drivers/gpio/gpio-em.c
+++ b/drivers/gpio/gpio-em.c
@@ -409,11 +409,8 @@ err0:
static int em_gio_remove(struct platform_device *pdev)
{
struct em_gio_priv *p = platform_get_drvdata(pdev);
- int ret;
- ret = gpiochip_remove(&p->gpio_chip);
- if (ret)
- return ret;
+ gpiochip_remove(&p->gpio_chip);
irq_domain_remove(p->irq_domain);
return 0;
diff --git a/drivers/gpio/gpio-f7188x.c b/drivers/gpio/gpio-f7188x.c
index 8f73ee093739..fd3202f968ff 100644
--- a/drivers/gpio/gpio-f7188x.c
+++ b/drivers/gpio/gpio-f7188x.c
@@ -317,13 +317,7 @@ static int f7188x_gpio_probe(struct platform_device *pdev)
err_gpiochip:
for (i = i - 1; i >= 0; i--) {
struct f7188x_gpio_bank *bank = &data->bank[i];
- int tmp;
-
- tmp = gpiochip_remove(&bank->chip);
- if (tmp < 0)
- dev_err(&pdev->dev,
- "Failed to remove gpiochip %d: %d\n",
- i, tmp);
+ gpiochip_remove(&bank->chip);
}
return err;
@@ -331,20 +325,12 @@ err_gpiochip:
static int f7188x_gpio_remove(struct platform_device *pdev)
{
- int err;
int i;
struct f7188x_gpio_data *data = platform_get_drvdata(pdev);
for (i = 0; i < data->nr_bank; i++) {
struct f7188x_gpio_bank *bank = &data->bank[i];
-
- err = gpiochip_remove(&bank->chip);
- if (err) {
- dev_err(&pdev->dev,
- "Failed to remove GPIO gpiochip %d: %d\n",
- i, err);
- return err;
- }
+ gpiochip_remove(&bank->chip);
}
return 0;
diff --git a/drivers/gpio/gpio-generic.c b/drivers/gpio/gpio-generic.c
index fea8c82bb8fc..16f6115e5bdb 100644
--- a/drivers/gpio/gpio-generic.c
+++ b/drivers/gpio/gpio-generic.c
@@ -398,7 +398,8 @@ static int bgpio_request(struct gpio_chip *chip, unsigned gpio_pin)
int bgpio_remove(struct bgpio_chip *bgc)
{
- return gpiochip_remove(&bgc->gc);
+ gpiochip_remove(&bgc->gc);
+ return 0;
}
EXPORT_SYMBOL_GPL(bgpio_remove);
diff --git a/drivers/gpio/gpio-grgpio.c b/drivers/gpio/gpio-grgpio.c
index 3c3f515b7916..66ad3df9d9cf 100644
--- a/drivers/gpio/gpio-grgpio.c
+++ b/drivers/gpio/gpio-grgpio.c
@@ -468,9 +468,7 @@ static int grgpio_remove(struct platform_device *ofdev)
}
}
- ret = gpiochip_remove(&priv->bgc.gc);
- if (ret)
- goto out;
+ gpiochip_remove(&priv->bgc.gc);
if (priv->domain)
irq_domain_remove(priv->domain);
diff --git a/drivers/gpio/gpio-ich.c b/drivers/gpio/gpio-ich.c
index 70304220a479..3784e81e7762 100644
--- a/drivers/gpio/gpio-ich.c
+++ b/drivers/gpio/gpio-ich.c
@@ -514,14 +514,7 @@ add_err:
static int ichx_gpio_remove(struct platform_device *pdev)
{
- int err;
-
- err = gpiochip_remove(&ichx_priv.chip);
- if (err) {
- dev_err(&pdev->dev, "%s failed, %d\n",
- "gpiochip_remove()", err);
- return err;
- }
+ gpiochip_remove(&ichx_priv.chip);
ichx_gpio_release_regions(ichx_priv.gpio_base, ichx_priv.use_gpio);
if (ichx_priv.pm_base)
diff --git a/drivers/gpio/gpio-intel-mid.c b/drivers/gpio/gpio-intel-mid.c
index 118a6bf455d9..aa28c65eb6b4 100644
--- a/drivers/gpio/gpio-intel-mid.c
+++ b/drivers/gpio/gpio-intel-mid.c
@@ -28,12 +28,10 @@
#include <linux/stddef.h>
#include <linux/interrupt.h>
#include <linux/init.h>
-#include <linux/irq.h>
#include <linux/io.h>
-#include <linux/gpio.h>
+#include <linux/gpio/driver.h>
#include <linux/slab.h>
#include <linux/pm_runtime.h>
-#include <linux/irqdomain.h>
#define INTEL_MID_IRQ_TYPE_EDGE (1 << 0)
#define INTEL_MID_IRQ_TYPE_LEVEL (1 << 1)
@@ -78,10 +76,12 @@ struct intel_mid_gpio {
void __iomem *reg_base;
spinlock_t lock;
struct pci_dev *pdev;
- struct irq_domain *domain;
};
-#define to_intel_gpio_priv(chip) container_of(chip, struct intel_mid_gpio, chip)
+static inline struct intel_mid_gpio *to_intel_gpio_priv(struct gpio_chip *gc)
+{
+ return container_of(gc, struct intel_mid_gpio, chip);
+}
static void __iomem *gpio_reg(struct gpio_chip *chip, unsigned offset,
enum GPIO_REG reg_type)
@@ -182,15 +182,10 @@ static int intel_gpio_direction_output(struct gpio_chip *chip,
return 0;
}
-static int intel_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
-{
- struct intel_mid_gpio *priv = to_intel_gpio_priv(chip);
- return irq_create_mapping(priv->domain, offset);
-}
-
static int intel_mid_irq_type(struct irq_data *d, unsigned type)
{
- struct intel_mid_gpio *priv = irq_data_get_irq_chip_data(d);
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct intel_mid_gpio *priv = to_intel_gpio_priv(gc);
u32 gpio = irqd_to_hwirq(d);
unsigned long flags;
u32 value;
@@ -231,33 +226,11 @@ static void intel_mid_irq_mask(struct irq_data *d)
{
}
-static int intel_mid_irq_reqres(struct irq_data *d)
-{
- struct intel_mid_gpio *priv = irq_data_get_irq_chip_data(d);
-
- if (gpio_lock_as_irq(&priv->chip, irqd_to_hwirq(d))) {
- dev_err(priv->chip.dev,
- "unable to lock HW IRQ %lu for IRQ\n",
- irqd_to_hwirq(d));
- return -EINVAL;
- }
- return 0;
-}
-
-static void intel_mid_irq_relres(struct irq_data *d)
-{
- struct intel_mid_gpio *priv = irq_data_get_irq_chip_data(d);
-
- gpio_unlock_as_irq(&priv->chip, irqd_to_hwirq(d));
-}
-
static struct irq_chip intel_mid_irqchip = {
.name = "INTEL_MID-GPIO",
.irq_mask = intel_mid_irq_mask,
.irq_unmask = intel_mid_irq_unmask,
.irq_set_type = intel_mid_irq_type,
- .irq_request_resources = intel_mid_irq_reqres,
- .irq_release_resources = intel_mid_irq_relres,
};
static const struct intel_mid_gpio_ddata gpio_lincroft = {
@@ -330,8 +303,9 @@ MODULE_DEVICE_TABLE(pci, intel_gpio_ids);
static void intel_mid_irq_handler(unsigned irq, struct irq_desc *desc)
{
+ struct gpio_chip *gc = irq_desc_get_handler_data(desc);
+ struct intel_mid_gpio *priv = to_intel_gpio_priv(gc);
struct irq_data *data = irq_desc_get_irq_data(desc);
- struct intel_mid_gpio *priv = irq_data_get_irq_handler_data(data);
struct irq_chip *chip = irq_data_get_irq_chip(data);
u32 base, gpio, mask;
unsigned long pending;
@@ -345,7 +319,7 @@ static void intel_mid_irq_handler(unsigned irq, struct irq_desc *desc)
mask = BIT(gpio);
/* Clear before handling so we can't lose an edge */
writel(mask, gedr);
- generic_handle_irq(irq_find_mapping(priv->domain,
+ generic_handle_irq(irq_find_mapping(gc->irqdomain,
base + gpio));
}
}
@@ -371,23 +345,6 @@ static void intel_mid_irq_init_hw(struct intel_mid_gpio *priv)
}
}
-static int intel_gpio_irq_map(struct irq_domain *d, unsigned int irq,
- irq_hw_number_t hwirq)
-{
- struct intel_mid_gpio *priv = d->host_data;
-
- irq_set_chip_and_handler(irq, &intel_mid_irqchip, handle_simple_irq);
- irq_set_chip_data(irq, priv);
- irq_set_irq_type(irq, IRQ_TYPE_NONE);
-
- return 0;
-}
-
-static const struct irq_domain_ops intel_gpio_irq_ops = {
- .map = intel_gpio_irq_map,
- .xlate = irq_domain_xlate_twocell,
-};
-
static int intel_gpio_runtime_idle(struct device *dev)
{
int err = pm_schedule_suspend(dev, 500);
@@ -441,7 +398,6 @@ static int intel_gpio_probe(struct pci_dev *pdev,
priv->chip.direction_output = intel_gpio_direction_output;
priv->chip.get = intel_gpio_get;
priv->chip.set = intel_gpio_set;
- priv->chip.to_irq = intel_gpio_to_irq;
priv->chip.base = gpio_base;
priv->chip.ngpio = ddata->ngpio;
priv->chip.can_sleep = false;
@@ -449,11 +405,6 @@ static int intel_gpio_probe(struct pci_dev *pdev,
spin_lock_init(&priv->lock);
- priv->domain = irq_domain_add_simple(pdev->dev.of_node, ddata->ngpio,
- irq_base, &intel_gpio_irq_ops, priv);
- if (!priv->domain)
- return -ENOMEM;
-
pci_set_drvdata(pdev, priv);
retval = gpiochip_add(&priv->chip);
if (retval) {
@@ -461,10 +412,23 @@ static int intel_gpio_probe(struct pci_dev *pdev,
return retval;
}
+ retval = gpiochip_irqchip_add(&priv->chip,
+ &intel_mid_irqchip,
+ irq_base,
+ handle_simple_irq,
+ IRQ_TYPE_NONE);
+ if (retval) {
+ dev_err(&pdev->dev,
+ "could not connect irqchip to gpiochip\n");
+ return retval;
+ }
+
intel_mid_irq_init_hw(priv);
- irq_set_handler_data(pdev->irq, priv);
- irq_set_chained_handler(pdev->irq, intel_mid_irq_handler);
+ gpiochip_set_chained_irqchip(&priv->chip,
+ &intel_mid_irqchip,
+ pdev->irq,
+ intel_mid_irq_handler);
pm_runtime_put_noidle(&pdev->dev);
pm_runtime_allow(&pdev->dev);
diff --git a/drivers/gpio/gpio-it8761e.c b/drivers/gpio/gpio-it8761e.c
index 278b81317010..dadfc245cf09 100644
--- a/drivers/gpio/gpio-it8761e.c
+++ b/drivers/gpio/gpio-it8761e.c
@@ -217,11 +217,7 @@ gpiochip_add_err:
static void __exit it8761e_gpio_exit(void)
{
if (gpio_ba) {
- int ret = gpiochip_remove(&it8761e_gpio_chip);
-
- WARN(ret, "%s(): gpiochip_remove() failed, ret=%d\n",
- __func__, ret);
-
+ gpiochip_remove(&it8761e_gpio_chip);
release_region(gpio_ba, GPIO_IOSIZE);
gpio_ba = 0;
}
diff --git a/drivers/gpio/gpio-janz-ttl.c b/drivers/gpio/gpio-janz-ttl.c
index 42852eaaf020..29ffe22ad97a 100644
--- a/drivers/gpio/gpio-janz-ttl.c
+++ b/drivers/gpio/gpio-janz-ttl.c
@@ -194,14 +194,8 @@ static int ttl_probe(struct platform_device *pdev)
static int ttl_remove(struct platform_device *pdev)
{
struct ttl_module *mod = platform_get_drvdata(pdev);
- struct device *dev = &pdev->dev;
- int ret;
- ret = gpiochip_remove(&mod->gpio);
- if (ret) {
- dev_err(dev, "unable to remove GPIO chip\n");
- return ret;
- }
+ gpiochip_remove(&mod->gpio);
return 0;
}
diff --git a/drivers/gpio/gpio-kempld.c b/drivers/gpio/gpio-kempld.c
index 1e5e51987d31..fd150adeebf9 100644
--- a/drivers/gpio/gpio-kempld.c
+++ b/drivers/gpio/gpio-kempld.c
@@ -199,7 +199,8 @@ static int kempld_gpio_remove(struct platform_device *pdev)
{
struct kempld_gpio_data *gpio = platform_get_drvdata(pdev);
- return gpiochip_remove(&gpio->chip);
+ gpiochip_remove(&gpio->chip);
+ return 0;
}
static struct platform_driver kempld_gpio_driver = {
diff --git a/drivers/gpio/gpio-lp3943.c b/drivers/gpio/gpio-lp3943.c
index a0341c92bcb4..6bbdad805b78 100644
--- a/drivers/gpio/gpio-lp3943.c
+++ b/drivers/gpio/gpio-lp3943.c
@@ -216,7 +216,8 @@ static int lp3943_gpio_remove(struct platform_device *pdev)
{
struct lp3943_gpio *lp3943_gpio = platform_get_drvdata(pdev);
- return gpiochip_remove(&lp3943_gpio->chip);
+ gpiochip_remove(&lp3943_gpio->chip);
+ return 0;
}
static const struct of_device_id lp3943_gpio_of_match[] = {
diff --git a/drivers/gpio/gpio-lpc32xx.c b/drivers/gpio/gpio-lpc32xx.c
index 225344d66404..b9b9799b368b 100644
--- a/drivers/gpio/gpio-lpc32xx.c
+++ b/drivers/gpio/gpio-lpc32xx.c
@@ -560,7 +560,7 @@ static int lpc32xx_gpio_probe(struct platform_device *pdev)
}
#ifdef CONFIG_OF
-static struct of_device_id lpc32xx_gpio_of_match[] = {
+static const struct of_device_id lpc32xx_gpio_of_match[] = {
{ .compatible = "nxp,lpc3220-gpio", },
{ },
};
diff --git a/drivers/gpio/gpio-lynxpoint.c b/drivers/gpio/gpio-lynxpoint.c
index 2bea89b72508..ff9eb911b5e4 100644
--- a/drivers/gpio/gpio-lynxpoint.c
+++ b/drivers/gpio/gpio-lynxpoint.c
@@ -25,9 +25,7 @@
#include <linux/types.h>
#include <linux/bitops.h>
#include <linux/interrupt.h>
-#include <linux/irq.h>
#include <linux/gpio.h>
-#include <linux/irqdomain.h>
#include <linux/slab.h>
#include <linux/acpi.h>
#include <linux/platform_device.h>
@@ -62,7 +60,6 @@
struct lp_gpio {
struct gpio_chip chip;
- struct irq_domain *domain;
struct platform_device *pdev;
spinlock_t lock;
unsigned long reg_base;
@@ -151,7 +148,8 @@ static void lp_gpio_free(struct gpio_chip *chip, unsigned offset)
static int lp_irq_type(struct irq_data *d, unsigned type)
{
- struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct lp_gpio *lg = container_of(gc, struct lp_gpio, chip);
u32 hwirq = irqd_to_hwirq(d);
unsigned long flags;
u32 value;
@@ -236,16 +234,11 @@ static int lp_gpio_direction_output(struct gpio_chip *chip,
return 0;
}
-static int lp_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
-{
- struct lp_gpio *lg = container_of(chip, struct lp_gpio, chip);
- return irq_create_mapping(lg->domain, offset);
-}
-
static void lp_gpio_irq_handler(unsigned hwirq, struct irq_desc *desc)
{
struct irq_data *data = irq_desc_get_irq_data(desc);
- struct lp_gpio *lg = irq_data_get_irq_handler_data(data);
+ struct gpio_chip *gc = irq_desc_get_handler_data(desc);
+ struct lp_gpio *lg = container_of(gc, struct lp_gpio, chip);
struct irq_chip *chip = irq_data_get_irq_chip(data);
u32 base, pin, mask;
unsigned long reg, ena, pending;
@@ -262,7 +255,7 @@ static void lp_gpio_irq_handler(unsigned hwirq, struct irq_desc *desc)
mask = BIT(pin);
/* Clear before handling so we don't lose an edge */
outl(mask, reg);
- irq = irq_find_mapping(lg->domain, base + pin);
+ irq = irq_find_mapping(lg->chip.irqdomain, base + pin);
generic_handle_irq(irq);
}
}
@@ -279,7 +272,8 @@ static void lp_irq_mask(struct irq_data *d)
static void lp_irq_enable(struct irq_data *d)
{
- struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct lp_gpio *lg = container_of(gc, struct lp_gpio, chip);
u32 hwirq = irqd_to_hwirq(d);
unsigned long reg = lp_gpio_reg(&lg->chip, hwirq, LP_INT_ENABLE);
unsigned long flags;
@@ -291,7 +285,8 @@ static void lp_irq_enable(struct irq_data *d)
static void lp_irq_disable(struct irq_data *d)
{
- struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct lp_gpio *lg = container_of(gc, struct lp_gpio, chip);
u32 hwirq = irqd_to_hwirq(d);
unsigned long reg = lp_gpio_reg(&lg->chip, hwirq, LP_INT_ENABLE);
unsigned long flags;
@@ -301,26 +296,6 @@ static void lp_irq_disable(struct irq_data *d)
spin_unlock_irqrestore(&lg->lock, flags);
}
-static int lp_irq_reqres(struct irq_data *d)
-{
- struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
-
- if (gpio_lock_as_irq(&lg->chip, irqd_to_hwirq(d))) {
- dev_err(lg->chip.dev,
- "unable to lock HW IRQ %lu for IRQ\n",
- irqd_to_hwirq(d));
- return -EINVAL;
- }
- return 0;
-}
-
-static void lp_irq_relres(struct irq_data *d)
-{
- struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
-
- gpio_unlock_as_irq(&lg->chip, irqd_to_hwirq(d));
-}
-
static struct irq_chip lp_irqchip = {
.name = "LP-GPIO",
.irq_mask = lp_irq_mask,
@@ -328,8 +303,6 @@ static struct irq_chip lp_irqchip = {
.irq_enable = lp_irq_enable,
.irq_disable = lp_irq_disable,
.irq_set_type = lp_irq_type,
- .irq_request_resources = lp_irq_reqres,
- .irq_release_resources = lp_irq_relres,
.flags = IRQCHIP_SKIP_SET_WAKE,
};
@@ -348,22 +321,6 @@ static void lp_gpio_irq_init_hw(struct lp_gpio *lg)
}
}
-static int lp_gpio_irq_map(struct irq_domain *d, unsigned int irq,
- irq_hw_number_t hwirq)
-{
- struct lp_gpio *lg = d->host_data;
-
- irq_set_chip_and_handler(irq, &lp_irqchip, handle_simple_irq);
- irq_set_chip_data(irq, lg);
- irq_set_irq_type(irq, IRQ_TYPE_NONE);
-
- return 0;
-}
-
-static const struct irq_domain_ops lp_gpio_irq_ops = {
- .map = lp_gpio_irq_map,
-};
-
static int lp_gpio_probe(struct platform_device *pdev)
{
struct lp_gpio *lg;
@@ -371,7 +328,6 @@ static int lp_gpio_probe(struct platform_device *pdev)
struct resource *io_rc, *irq_rc;
struct device *dev = &pdev->dev;
unsigned long reg_len;
- unsigned hwirq;
int ret = -ENODEV;
lg = devm_kzalloc(dev, sizeof(struct lp_gpio), GFP_KERNEL);
@@ -414,27 +370,28 @@ static int lp_gpio_probe(struct platform_device *pdev)
gc->can_sleep = false;
gc->dev = dev;
+ ret = gpiochip_add(gc);
+ if (ret) {
+ dev_err(dev, "failed adding lp-gpio chip\n");
+ return ret;
+ }
+
/* set up interrupts */
if (irq_rc && irq_rc->start) {
- hwirq = irq_rc->start;
- gc->to_irq = lp_gpio_to_irq;
-
- lg->domain = irq_domain_add_linear(NULL, LP_NUM_GPIO,
- &lp_gpio_irq_ops, lg);
- if (!lg->domain)
- return -ENXIO;
-
lp_gpio_irq_init_hw(lg);
+ ret = gpiochip_irqchip_add(gc, &lp_irqchip, 0,
+ handle_simple_irq, IRQ_TYPE_NONE);
+ if (ret) {
+ dev_err(dev, "failed to add irqchip\n");
+ gpiochip_remove(gc);
+ return ret;
+ }
- irq_set_handler_data(hwirq, lg);
- irq_set_chained_handler(hwirq, lp_gpio_irq_handler);
+ gpiochip_set_chained_irqchip(gc, &lp_irqchip,
+ (unsigned)irq_rc->start,
+ lp_gpio_irq_handler);
}
- ret = gpiochip_add(gc);
- if (ret) {
- dev_err(dev, "failed adding lp-gpio chip\n");
- return ret;
- }
pm_runtime_enable(dev);
return 0;
@@ -465,11 +422,8 @@ MODULE_DEVICE_TABLE(acpi, lynxpoint_gpio_acpi_match);
static int lp_gpio_remove(struct platform_device *pdev)
{
struct lp_gpio *lg = platform_get_drvdata(pdev);
- int err;
pm_runtime_disable(&pdev->dev);
- err = gpiochip_remove(&lg->chip);
- if (err)
- dev_warn(&pdev->dev, "failed to remove gpio_chip.\n");
+ gpiochip_remove(&lg->chip);
return 0;
}
diff --git a/drivers/gpio/gpio-max730x.c b/drivers/gpio/gpio-max730x.c
index 0814584fcdc1..18ab89e20806 100644
--- a/drivers/gpio/gpio-max730x.c
+++ b/drivers/gpio/gpio-max730x.c
@@ -228,21 +228,16 @@ EXPORT_SYMBOL_GPL(__max730x_probe);
int __max730x_remove(struct device *dev)
{
struct max7301 *ts = dev_get_drvdata(dev);
- int ret;
if (ts == NULL)
return -ENODEV;
/* Power down the chip and disable IRQ output */
ts->write(dev, 0x04, 0x00);
-
- ret = gpiochip_remove(&ts->chip);
- if (!ret)
- mutex_destroy(&ts->lock);
- else
- dev_err(dev, "Failed to remove GPIO controller: %d\n", ret);
-
- return ret;
+ gpiochip_remove(&ts->chip);
+ mutex_destroy(&ts->lock);
+ kfree(ts);
+ return 0;
}
EXPORT_SYMBOL_GPL(__max730x_remove);
diff --git a/drivers/gpio/gpio-max732x.c b/drivers/gpio/gpio-max732x.c
index 7c36f2b0983d..6c676225b886 100644
--- a/drivers/gpio/gpio-max732x.c
+++ b/drivers/gpio/gpio-max732x.c
@@ -676,12 +676,7 @@ static int max732x_remove(struct i2c_client *client)
}
}
- ret = gpiochip_remove(&chip->gpio_chip);
- if (ret) {
- dev_err(&client->dev, "%s failed, %d\n",
- "gpiochip_remove()", ret);
- return ret;
- }
+ gpiochip_remove(&chip->gpio_chip);
max732x_irq_teardown(chip);
diff --git a/drivers/gpio/gpio-mc33880.c b/drivers/gpio/gpio-mc33880.c
index 553a80a5eaf3..4e3e160e5db2 100644
--- a/drivers/gpio/gpio-mc33880.c
+++ b/drivers/gpio/gpio-mc33880.c
@@ -149,20 +149,15 @@ exit_destroy:
static int mc33880_remove(struct spi_device *spi)
{
struct mc33880 *mc;
- int ret;
mc = spi_get_drvdata(spi);
if (mc == NULL)
return -ENODEV;
- ret = gpiochip_remove(&mc->chip);
- if (!ret)
- mutex_destroy(&mc->lock);
- else
- dev_err(&spi->dev, "Failed to remove the GPIO controller: %d\n",
- ret);
+ gpiochip_remove(&mc->chip);
+ mutex_destroy(&mc->lock);
- return ret;
+ return 0;
}
static struct spi_driver mc33880_driver = {
diff --git a/drivers/gpio/gpio-mc9s08dz60.c b/drivers/gpio/gpio-mc9s08dz60.c
index dce35ff00db7..d62b4f8182bf 100644
--- a/drivers/gpio/gpio-mc9s08dz60.c
+++ b/drivers/gpio/gpio-mc9s08dz60.c
@@ -118,7 +118,8 @@ static int mc9s08dz60_remove(struct i2c_client *client)
mc9s = i2c_get_clientdata(client);
- return gpiochip_remove(&mc9s->chip);
+ gpiochip_remove(&mc9s->chip);
+ return 0;
}
static const struct i2c_device_id mc9s08dz60_id[] = {
diff --git a/drivers/gpio/gpio-mcp23s08.c b/drivers/gpio/gpio-mcp23s08.c
index 57adbc90fdad..6f183d9b487e 100644
--- a/drivers/gpio/gpio-mcp23s08.c
+++ b/drivers/gpio/gpio-mcp23s08.c
@@ -812,16 +812,14 @@ fail:
static int mcp230xx_remove(struct i2c_client *client)
{
struct mcp23s08 *mcp = i2c_get_clientdata(client);
- int status;
if (client->irq && mcp->irq_controller)
mcp23s08_irq_teardown(mcp);
- status = gpiochip_remove(&mcp->chip);
- if (status == 0)
- kfree(mcp);
+ gpiochip_remove(&mcp->chip);
+ kfree(mcp);
- return status;
+ return 0;
}
static const struct i2c_device_id mcp230xx_id[] = {
@@ -960,13 +958,10 @@ static int mcp23s08_probe(struct spi_device *spi)
fail:
for (addr = 0; addr < ARRAY_SIZE(data->mcp); addr++) {
- int tmp;
if (!data->mcp[addr])
continue;
- tmp = gpiochip_remove(&data->mcp[addr]->chip);
- if (tmp < 0)
- dev_err(&spi->dev, "%s --> %d\n", "remove", tmp);
+ gpiochip_remove(&data->mcp[addr]->chip);
}
kfree(data);
return status;
@@ -976,23 +971,16 @@ static int mcp23s08_remove(struct spi_device *spi)
{
struct mcp23s08_driver_data *data = spi_get_drvdata(spi);
unsigned addr;
- int status = 0;
for (addr = 0; addr < ARRAY_SIZE(data->mcp); addr++) {
- int tmp;
if (!data->mcp[addr])
continue;
- tmp = gpiochip_remove(&data->mcp[addr]->chip);
- if (tmp < 0) {
- dev_err(&spi->dev, "%s --> %d\n", "remove", tmp);
- status = tmp;
- }
+ gpiochip_remove(&data->mcp[addr]->chip);
}
- if (status == 0)
- kfree(data);
- return status;
+ kfree(data);
+ return 0;
}
static const struct spi_device_id mcp23s08_ids[] = {
diff --git a/drivers/gpio/gpio-ml-ioh.c b/drivers/gpio/gpio-ml-ioh.c
index d51329d23d38..5536108aa9db 100644
--- a/drivers/gpio/gpio-ml-ioh.c
+++ b/drivers/gpio/gpio-ml-ioh.c
@@ -497,8 +497,7 @@ err_irq_alloc_descs:
err_gpiochip_add:
while (--i >= 0) {
chip--;
- if (gpiochip_remove(&chip->gpio))
- dev_err(&pdev->dev, "Failed gpiochip_remove(%d)\n", i);
+ gpiochip_remove(&chip->gpio);
}
kfree(chip_save);
@@ -519,7 +518,6 @@ err_pci_enable:
static void ioh_gpio_remove(struct pci_dev *pdev)
{
- int err;
int i;
struct ioh_gpio *chip = pci_get_drvdata(pdev);
void *chip_save;
@@ -530,9 +528,7 @@ static void ioh_gpio_remove(struct pci_dev *pdev)
for (i = 0; i < 8; i++, chip++) {
irq_free_descs(chip->irq_base, num_ports[i]);
- err = gpiochip_remove(&chip->gpio);
- if (err)
- dev_err(&pdev->dev, "Failed gpiochip_remove\n");
+ gpiochip_remove(&chip->gpio);
}
chip = chip_save;
diff --git a/drivers/gpio/gpio-msm-v2.c b/drivers/gpio/gpio-msm-v2.c
index a3351acd4963..94f57670df9a 100644
--- a/drivers/gpio/gpio-msm-v2.c
+++ b/drivers/gpio/gpio-msm-v2.c
@@ -438,10 +438,7 @@ MODULE_DEVICE_TABLE(of, msm_gpio_of_match);
static int msm_gpio_remove(struct platform_device *dev)
{
- int ret = gpiochip_remove(&msm_gpio.gpio_chip);
-
- if (ret < 0)
- return ret;
+ gpiochip_remove(&msm_gpio.gpio_chip);
irq_set_handler(msm_gpio.summary_irq, NULL);
diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c
index db83b3c0a449..f4e54a92e04a 100644
--- a/drivers/gpio/gpio-mxc.c
+++ b/drivers/gpio/gpio-mxc.c
@@ -485,7 +485,7 @@ static int mxc_gpio_probe(struct platform_device *pdev)
out_irqdesc_free:
irq_free_descs(irq_base, 32);
out_gpiochip_remove:
- WARN_ON(gpiochip_remove(&port->bgc.gc) < 0);
+ gpiochip_remove(&port->bgc.gc);
out_bgpio_remove:
bgpio_remove(&port->bgc);
out_bgio:
diff --git a/drivers/gpio/gpio-octeon.c b/drivers/gpio/gpio-octeon.c
index dbb08546b9ec..5c5770c99c80 100644
--- a/drivers/gpio/gpio-octeon.c
+++ b/drivers/gpio/gpio-octeon.c
@@ -129,7 +129,8 @@ out:
static int octeon_gpio_remove(struct platform_device *pdev)
{
struct gpio_chip *chip = pdev->dev.platform_data;
- return gpiochip_remove(chip);
+ gpiochip_remove(chip);
+ return 0;
}
static struct of_device_id octeon_gpio_match[] = {
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index 00f29aa1fb9d..174932165fcb 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -24,7 +24,6 @@
#include <linux/pm.h>
#include <linux/of.h>
#include <linux/of_device.h>
-#include <linux/irqchip/chained_irq.h>
#include <linux/gpio.h>
#include <linux/bitops.h>
#include <linux/platform_data/gpio-omap.h>
@@ -89,18 +88,19 @@ struct gpio_bank {
#define BANK_USED(bank) (bank->mod_usage || bank->irq_usage)
#define LINE_USED(line, offset) (line & (BIT(offset)))
-static int irq_to_gpio(struct gpio_bank *bank, unsigned int gpio_irq)
+static int omap_irq_to_gpio(struct gpio_bank *bank, unsigned int gpio_irq)
{
return bank->chip.base + gpio_irq;
}
-static inline struct gpio_bank *_irq_data_get_bank(struct irq_data *d)
+static inline struct gpio_bank *omap_irq_data_get_bank(struct irq_data *d)
{
struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
return container_of(chip, struct gpio_bank, chip);
}
-static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input)
+static void omap_set_gpio_direction(struct gpio_bank *bank, int gpio,
+ int is_input)
{
void __iomem *reg = bank->base;
u32 l;
@@ -117,7 +117,8 @@ static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input)
/* set data out value using dedicate set/clear register */
-static void _set_gpio_dataout_reg(struct gpio_bank *bank, int gpio, int enable)
+static void omap_set_gpio_dataout_reg(struct gpio_bank *bank, int gpio,
+ int enable)
{
void __iomem *reg = bank->base;
u32 l = GPIO_BIT(bank, gpio);
@@ -134,7 +135,8 @@ static void _set_gpio_dataout_reg(struct gpio_bank *bank, int gpio, int enable)
}
/* set data out value using mask register */
-static void _set_gpio_dataout_mask(struct gpio_bank *bank, int gpio, int enable)
+static void omap_set_gpio_dataout_mask(struct gpio_bank *bank, int gpio,
+ int enable)
{
void __iomem *reg = bank->base + bank->regs->dataout;
u32 gpio_bit = GPIO_BIT(bank, gpio);
@@ -149,21 +151,21 @@ static void _set_gpio_dataout_mask(struct gpio_bank *bank, int gpio, int enable)
bank->context.dataout = l;
}
-static int _get_gpio_datain(struct gpio_bank *bank, int offset)
+static int omap_get_gpio_datain(struct gpio_bank *bank, int offset)
{
void __iomem *reg = bank->base + bank->regs->datain;
return (readl_relaxed(reg) & (BIT(offset))) != 0;
}
-static int _get_gpio_dataout(struct gpio_bank *bank, int offset)
+static int omap_get_gpio_dataout(struct gpio_bank *bank, int offset)
{
void __iomem *reg = bank->base + bank->regs->dataout;
return (readl_relaxed(reg) & (BIT(offset))) != 0;
}
-static inline void _gpio_rmw(void __iomem *base, u32 reg, u32 mask, bool set)
+static inline void omap_gpio_rmw(void __iomem *base, u32 reg, u32 mask, bool set)
{
int l = readl_relaxed(base + reg);
@@ -175,7 +177,7 @@ static inline void _gpio_rmw(void __iomem *base, u32 reg, u32 mask, bool set)
writel_relaxed(l, base + reg);
}
-static inline void _gpio_dbck_enable(struct gpio_bank *bank)
+static inline void omap_gpio_dbck_enable(struct gpio_bank *bank)
{
if (bank->dbck_enable_mask && !bank->dbck_enabled) {
clk_prepare_enable(bank->dbck);
@@ -186,7 +188,7 @@ static inline void _gpio_dbck_enable(struct gpio_bank *bank)
}
}
-static inline void _gpio_dbck_disable(struct gpio_bank *bank)
+static inline void omap_gpio_dbck_disable(struct gpio_bank *bank)
{
if (bank->dbck_enable_mask && bank->dbck_enabled) {
/*
@@ -202,7 +204,7 @@ static inline void _gpio_dbck_disable(struct gpio_bank *bank)
}
/**
- * _set_gpio_debounce - low level gpio debounce time
+ * omap2_set_gpio_debounce - low level gpio debounce time
* @bank: the gpio bank we're acting upon
* @gpio: the gpio number on this @gpio
* @debounce: debounce time to use
@@ -210,8 +212,8 @@ static inline void _gpio_dbck_disable(struct gpio_bank *bank)
* OMAP's debounce time is in 31us steps so we need
* to convert and round up to the closest unit.
*/
-static void _set_gpio_debounce(struct gpio_bank *bank, unsigned gpio,
- unsigned debounce)
+static void omap2_set_gpio_debounce(struct gpio_bank *bank, unsigned gpio,
+ unsigned debounce)
{
void __iomem *reg;
u32 val;
@@ -252,7 +254,7 @@ static void _set_gpio_debounce(struct gpio_bank *bank, unsigned gpio,
* used within _gpio_dbck_enable() is still not initialized at
* that point. Therefore we have to enable dbck here.
*/
- _gpio_dbck_enable(bank);
+ omap_gpio_dbck_enable(bank);
if (bank->dbck_enable_mask) {
bank->context.debounce = debounce;
bank->context.debounce_en = val;
@@ -260,7 +262,7 @@ static void _set_gpio_debounce(struct gpio_bank *bank, unsigned gpio,
}
/**
- * _clear_gpio_debounce - clear debounce settings for a gpio
+ * omap_clear_gpio_debounce - clear debounce settings for a gpio
* @bank: the gpio bank we're acting upon
* @gpio: the gpio number on this @gpio
*
@@ -269,7 +271,7 @@ static void _set_gpio_debounce(struct gpio_bank *bank, unsigned gpio,
* time too. The debounce clock will also be disabled when calling this function
* if this is the only gpio in the bank using debounce.
*/
-static void _clear_gpio_debounce(struct gpio_bank *bank, unsigned gpio)
+static void omap_clear_gpio_debounce(struct gpio_bank *bank, unsigned gpio)
{
u32 gpio_bit = GPIO_BIT(bank, gpio);
@@ -293,20 +295,20 @@ static void _clear_gpio_debounce(struct gpio_bank *bank, unsigned gpio)
}
}
-static inline void set_gpio_trigger(struct gpio_bank *bank, int gpio,
+static inline void omap_set_gpio_trigger(struct gpio_bank *bank, int gpio,
unsigned trigger)
{
void __iomem *base = bank->base;
u32 gpio_bit = BIT(gpio);
- _gpio_rmw(base, bank->regs->leveldetect0, gpio_bit,
- trigger & IRQ_TYPE_LEVEL_LOW);
- _gpio_rmw(base, bank->regs->leveldetect1, gpio_bit,
- trigger & IRQ_TYPE_LEVEL_HIGH);
- _gpio_rmw(base, bank->regs->risingdetect, gpio_bit,
- trigger & IRQ_TYPE_EDGE_RISING);
- _gpio_rmw(base, bank->regs->fallingdetect, gpio_bit,
- trigger & IRQ_TYPE_EDGE_FALLING);
+ omap_gpio_rmw(base, bank->regs->leveldetect0, gpio_bit,
+ trigger & IRQ_TYPE_LEVEL_LOW);
+ omap_gpio_rmw(base, bank->regs->leveldetect1, gpio_bit,
+ trigger & IRQ_TYPE_LEVEL_HIGH);
+ omap_gpio_rmw(base, bank->regs->risingdetect, gpio_bit,
+ trigger & IRQ_TYPE_EDGE_RISING);
+ omap_gpio_rmw(base, bank->regs->fallingdetect, gpio_bit,
+ trigger & IRQ_TYPE_EDGE_FALLING);
bank->context.leveldetect0 =
readl_relaxed(bank->base + bank->regs->leveldetect0);
@@ -318,7 +320,7 @@ static inline void set_gpio_trigger(struct gpio_bank *bank, int gpio,
readl_relaxed(bank->base + bank->regs->fallingdetect);
if (likely(!(bank->non_wakeup_gpios & gpio_bit))) {
- _gpio_rmw(base, bank->regs->wkup_en, gpio_bit, trigger != 0);
+ omap_gpio_rmw(base, bank->regs->wkup_en, gpio_bit, trigger != 0);
bank->context.wake_en =
readl_relaxed(bank->base + bank->regs->wkup_en);
}
@@ -354,7 +356,7 @@ exit:
* This only applies to chips that can't do both rising and falling edge
* detection at once. For all other chips, this function is a noop.
*/
-static void _toggle_gpio_edge_triggering(struct gpio_bank *bank, int gpio)
+static void omap_toggle_gpio_edge_triggering(struct gpio_bank *bank, int gpio)
{
void __iomem *reg = bank->base;
u32 l = 0;
@@ -373,18 +375,18 @@ static void _toggle_gpio_edge_triggering(struct gpio_bank *bank, int gpio)
writel_relaxed(l, reg);
}
#else
-static void _toggle_gpio_edge_triggering(struct gpio_bank *bank, int gpio) {}
+static void omap_toggle_gpio_edge_triggering(struct gpio_bank *bank, int gpio) {}
#endif
-static int _set_gpio_triggering(struct gpio_bank *bank, int gpio,
- unsigned trigger)
+static int omap_set_gpio_triggering(struct gpio_bank *bank, int gpio,
+ unsigned trigger)
{
void __iomem *reg = bank->base;
void __iomem *base = bank->base;
u32 l = 0;
if (bank->regs->leveldetect0 && bank->regs->wkup_en) {
- set_gpio_trigger(bank, gpio, trigger);
+ omap_set_gpio_trigger(bank, gpio, trigger);
} else if (bank->regs->irqctrl) {
reg += bank->regs->irqctrl;
@@ -414,7 +416,7 @@ static int _set_gpio_triggering(struct gpio_bank *bank, int gpio,
l |= BIT(gpio << 1);
/* Enable wake-up during idle for dynamic tick */
- _gpio_rmw(base, bank->regs->wkup_en, BIT(gpio), trigger);
+ omap_gpio_rmw(base, bank->regs->wkup_en, BIT(gpio), trigger);
bank->context.wake_en =
readl_relaxed(bank->base + bank->regs->wkup_en);
writel_relaxed(l, reg);
@@ -422,7 +424,7 @@ static int _set_gpio_triggering(struct gpio_bank *bank, int gpio,
return 0;
}
-static void _enable_gpio_module(struct gpio_bank *bank, unsigned offset)
+static void omap_enable_gpio_module(struct gpio_bank *bank, unsigned offset)
{
if (bank->regs->pinctrl) {
void __iomem *reg = bank->base + bank->regs->pinctrl;
@@ -443,7 +445,7 @@ static void _enable_gpio_module(struct gpio_bank *bank, unsigned offset)
}
}
-static void _disable_gpio_module(struct gpio_bank *bank, unsigned offset)
+static void omap_disable_gpio_module(struct gpio_bank *bank, unsigned offset)
{
void __iomem *base = bank->base;
@@ -451,7 +453,7 @@ static void _disable_gpio_module(struct gpio_bank *bank, unsigned offset)
!LINE_USED(bank->mod_usage, offset) &&
!LINE_USED(bank->irq_usage, offset)) {
/* Disable wake-up during idle for dynamic tick */
- _gpio_rmw(base, bank->regs->wkup_en, BIT(offset), 0);
+ omap_gpio_rmw(base, bank->regs->wkup_en, BIT(offset), 0);
bank->context.wake_en =
readl_relaxed(bank->base + bank->regs->wkup_en);
}
@@ -468,16 +470,16 @@ static void _disable_gpio_module(struct gpio_bank *bank, unsigned offset)
}
}
-static int gpio_is_input(struct gpio_bank *bank, int mask)
+static int omap_gpio_is_input(struct gpio_bank *bank, int mask)
{
void __iomem *reg = bank->base + bank->regs->direction;
return readl_relaxed(reg) & mask;
}
-static int gpio_irq_type(struct irq_data *d, unsigned type)
+static int omap_gpio_irq_type(struct irq_data *d, unsigned type)
{
- struct gpio_bank *bank = _irq_data_get_bank(d);
+ struct gpio_bank *bank = omap_irq_data_get_bank(d);
unsigned gpio = 0;
int retval;
unsigned long flags;
@@ -492,7 +494,7 @@ static int gpio_irq_type(struct irq_data *d, unsigned type)
#endif
if (!gpio)
- gpio = irq_to_gpio(bank, d->hwirq);
+ gpio = omap_irq_to_gpio(bank, d->hwirq);
if (type & ~IRQ_TYPE_SENSE_MASK)
return -EINVAL;
@@ -503,11 +505,11 @@ static int gpio_irq_type(struct irq_data *d, unsigned type)
spin_lock_irqsave(&bank->lock, flags);
offset = GPIO_INDEX(bank, gpio);
- retval = _set_gpio_triggering(bank, offset, type);
+ retval = omap_set_gpio_triggering(bank, offset, type);
if (!LINE_USED(bank->mod_usage, offset)) {
- _enable_gpio_module(bank, offset);
- _set_gpio_direction(bank, offset, 1);
- } else if (!gpio_is_input(bank, BIT(offset))) {
+ omap_enable_gpio_module(bank, offset);
+ omap_set_gpio_direction(bank, offset, 1);
+ } else if (!omap_gpio_is_input(bank, BIT(offset))) {
spin_unlock_irqrestore(&bank->lock, flags);
return -EINVAL;
}
@@ -523,7 +525,7 @@ static int gpio_irq_type(struct irq_data *d, unsigned type)
return retval;
}
-static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
+static void omap_clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
{
void __iomem *reg = bank->base;
@@ -540,12 +542,12 @@ static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
readl_relaxed(reg);
}
-static inline void _clear_gpio_irqstatus(struct gpio_bank *bank, int gpio)
+static inline void omap_clear_gpio_irqstatus(struct gpio_bank *bank, int gpio)
{
- _clear_gpio_irqbank(bank, GPIO_BIT(bank, gpio));
+ omap_clear_gpio_irqbank(bank, GPIO_BIT(bank, gpio));
}
-static u32 _get_gpio_irqbank_mask(struct gpio_bank *bank)
+static u32 omap_get_gpio_irqbank_mask(struct gpio_bank *bank)
{
void __iomem *reg = bank->base;
u32 l;
@@ -559,7 +561,7 @@ static u32 _get_gpio_irqbank_mask(struct gpio_bank *bank)
return l;
}
-static void _enable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
+static void omap_enable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
{
void __iomem *reg = bank->base;
u32 l;
@@ -581,7 +583,7 @@ static void _enable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
writel_relaxed(l, reg);
}
-static void _disable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
+static void omap_disable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
{
void __iomem *reg = bank->base;
u32 l;
@@ -603,12 +605,13 @@ static void _disable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
writel_relaxed(l, reg);
}
-static inline void _set_gpio_irqenable(struct gpio_bank *bank, int gpio, int enable)
+static inline void omap_set_gpio_irqenable(struct gpio_bank *bank, int gpio,
+ int enable)
{
if (enable)
- _enable_gpio_irqbank(bank, GPIO_BIT(bank, gpio));
+ omap_enable_gpio_irqbank(bank, GPIO_BIT(bank, gpio));
else
- _disable_gpio_irqbank(bank, GPIO_BIT(bank, gpio));
+ omap_disable_gpio_irqbank(bank, GPIO_BIT(bank, gpio));
}
/*
@@ -619,7 +622,7 @@ static inline void _set_gpio_irqenable(struct gpio_bank *bank, int gpio, int ena
* enabled. When system is suspended, only selected GPIO interrupts need
* to have wake-up enabled.
*/
-static int _set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable)
+static int omap_set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable)
{
u32 gpio_bit = GPIO_BIT(bank, gpio);
unsigned long flags;
@@ -642,22 +645,22 @@ static int _set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable)
return 0;
}
-static void _reset_gpio(struct gpio_bank *bank, int gpio)
+static void omap_reset_gpio(struct gpio_bank *bank, int gpio)
{
- _set_gpio_direction(bank, GPIO_INDEX(bank, gpio), 1);
- _set_gpio_irqenable(bank, gpio, 0);
- _clear_gpio_irqstatus(bank, gpio);
- _set_gpio_triggering(bank, GPIO_INDEX(bank, gpio), IRQ_TYPE_NONE);
- _clear_gpio_debounce(bank, gpio);
+ omap_set_gpio_direction(bank, GPIO_INDEX(bank, gpio), 1);
+ omap_set_gpio_irqenable(bank, gpio, 0);
+ omap_clear_gpio_irqstatus(bank, gpio);
+ omap_set_gpio_triggering(bank, GPIO_INDEX(bank, gpio), IRQ_TYPE_NONE);
+ omap_clear_gpio_debounce(bank, gpio);
}
/* Use disable_irq_wake() and enable_irq_wake() functions from drivers */
-static int gpio_wake_enable(struct irq_data *d, unsigned int enable)
+static int omap_gpio_wake_enable(struct irq_data *d, unsigned int enable)
{
- struct gpio_bank *bank = _irq_data_get_bank(d);
- unsigned int gpio = irq_to_gpio(bank, d->hwirq);
+ struct gpio_bank *bank = omap_irq_data_get_bank(d);
+ unsigned int gpio = omap_irq_to_gpio(bank, d->hwirq);
- return _set_gpio_wakeup(bank, gpio, enable);
+ return omap_set_gpio_wakeup(bank, gpio, enable);
}
static int omap_gpio_request(struct gpio_chip *chip, unsigned offset)
@@ -678,8 +681,8 @@ static int omap_gpio_request(struct gpio_chip *chip, unsigned offset)
* not already been requested.
*/
if (!LINE_USED(bank->irq_usage, offset)) {
- _set_gpio_triggering(bank, offset, IRQ_TYPE_NONE);
- _enable_gpio_module(bank, offset);
+ omap_set_gpio_triggering(bank, offset, IRQ_TYPE_NONE);
+ omap_enable_gpio_module(bank, offset);
}
bank->mod_usage |= BIT(offset);
spin_unlock_irqrestore(&bank->lock, flags);
@@ -694,8 +697,8 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset)
spin_lock_irqsave(&bank->lock, flags);
bank->mod_usage &= ~(BIT(offset));
- _disable_gpio_module(bank, offset);
- _reset_gpio(bank, bank->chip.base + offset);
+ omap_disable_gpio_module(bank, offset);
+ omap_reset_gpio(bank, bank->chip.base + offset);
spin_unlock_irqrestore(&bank->lock, flags);
/*
@@ -715,7 +718,7 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset)
* line's interrupt handler has been run, we may miss some nested
* interrupts.
*/
-static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
+static void omap_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
{
void __iomem *isr_reg = NULL;
u32 isr;
@@ -738,7 +741,7 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
u32 isr_saved, level_mask = 0;
u32 enabled;
- enabled = _get_gpio_irqbank_mask(bank);
+ enabled = omap_get_gpio_irqbank_mask(bank);
isr_saved = isr = readl_relaxed(isr_reg) & enabled;
if (bank->level_mask)
@@ -747,9 +750,9 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
/* clear edge sensitive interrupts before handler(s) are
called so that we don't miss any interrupt occurred while
executing them */
- _disable_gpio_irqbank(bank, isr_saved & ~level_mask);
- _clear_gpio_irqbank(bank, isr_saved & ~level_mask);
- _enable_gpio_irqbank(bank, isr_saved & ~level_mask);
+ omap_disable_gpio_irqbank(bank, isr_saved & ~level_mask);
+ omap_clear_gpio_irqbank(bank, isr_saved & ~level_mask);
+ omap_enable_gpio_irqbank(bank, isr_saved & ~level_mask);
/* if there is only edge sensitive GPIO pin interrupts
configured, we could unmask GPIO bank interrupt immediately */
@@ -773,7 +776,7 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
* This will be indicated in the bank toggle_mask.
*/
if (bank->toggle_mask & (BIT(bit)))
- _toggle_gpio_edge_triggering(bank, bit);
+ omap_toggle_gpio_edge_triggering(bank, bit);
generic_handle_irq(irq_find_mapping(bank->chip.irqdomain,
bit));
@@ -789,18 +792,18 @@ exit:
pm_runtime_put(bank->dev);
}
-static void gpio_irq_shutdown(struct irq_data *d)
+static void omap_gpio_irq_shutdown(struct irq_data *d)
{
- struct gpio_bank *bank = _irq_data_get_bank(d);
- unsigned int gpio = irq_to_gpio(bank, d->hwirq);
+ struct gpio_bank *bank = omap_irq_data_get_bank(d);
+ unsigned int gpio = omap_irq_to_gpio(bank, d->hwirq);
unsigned long flags;
unsigned offset = GPIO_INDEX(bank, gpio);
spin_lock_irqsave(&bank->lock, flags);
gpio_unlock_as_irq(&bank->chip, offset);
bank->irq_usage &= ~(BIT(offset));
- _disable_gpio_module(bank, offset);
- _reset_gpio(bank, gpio);
+ omap_disable_gpio_module(bank, offset);
+ omap_reset_gpio(bank, gpio);
spin_unlock_irqrestore(&bank->lock, flags);
/*
@@ -811,57 +814,57 @@ static void gpio_irq_shutdown(struct irq_data *d)
pm_runtime_put(bank->dev);
}
-static void gpio_ack_irq(struct irq_data *d)
+static void omap_gpio_ack_irq(struct irq_data *d)
{
- struct gpio_bank *bank = _irq_data_get_bank(d);
- unsigned int gpio = irq_to_gpio(bank, d->hwirq);
+ struct gpio_bank *bank = omap_irq_data_get_bank(d);
+ unsigned int gpio = omap_irq_to_gpio(bank, d->hwirq);
- _clear_gpio_irqstatus(bank, gpio);
+ omap_clear_gpio_irqstatus(bank, gpio);
}
-static void gpio_mask_irq(struct irq_data *d)
+static void omap_gpio_mask_irq(struct irq_data *d)
{
- struct gpio_bank *bank = _irq_data_get_bank(d);
- unsigned int gpio = irq_to_gpio(bank, d->hwirq);
+ struct gpio_bank *bank = omap_irq_data_get_bank(d);
+ unsigned int gpio = omap_irq_to_gpio(bank, d->hwirq);
unsigned long flags;
spin_lock_irqsave(&bank->lock, flags);
- _set_gpio_irqenable(bank, gpio, 0);
- _set_gpio_triggering(bank, GPIO_INDEX(bank, gpio), IRQ_TYPE_NONE);
+ omap_set_gpio_irqenable(bank, gpio, 0);
+ omap_set_gpio_triggering(bank, GPIO_INDEX(bank, gpio), IRQ_TYPE_NONE);
spin_unlock_irqrestore(&bank->lock, flags);
}
-static void gpio_unmask_irq(struct irq_data *d)
+static void omap_gpio_unmask_irq(struct irq_data *d)
{
- struct gpio_bank *bank = _irq_data_get_bank(d);
- unsigned int gpio = irq_to_gpio(bank, d->hwirq);
+ struct gpio_bank *bank = omap_irq_data_get_bank(d);
+ unsigned int gpio = omap_irq_to_gpio(bank, d->hwirq);
unsigned int irq_mask = GPIO_BIT(bank, gpio);
u32 trigger = irqd_get_trigger_type(d);
unsigned long flags;
spin_lock_irqsave(&bank->lock, flags);
if (trigger)
- _set_gpio_triggering(bank, GPIO_INDEX(bank, gpio), trigger);
+ omap_set_gpio_triggering(bank, GPIO_INDEX(bank, gpio), trigger);
/* For level-triggered GPIOs, the clearing must be done after
* the HW source is cleared, thus after the handler has run */
if (bank->level_mask & irq_mask) {
- _set_gpio_irqenable(bank, gpio, 0);
- _clear_gpio_irqstatus(bank, gpio);
+ omap_set_gpio_irqenable(bank, gpio, 0);
+ omap_clear_gpio_irqstatus(bank, gpio);
}
- _set_gpio_irqenable(bank, gpio, 1);
+ omap_set_gpio_irqenable(bank, gpio, 1);
spin_unlock_irqrestore(&bank->lock, flags);
}
static struct irq_chip gpio_irq_chip = {
.name = "GPIO",
- .irq_shutdown = gpio_irq_shutdown,
- .irq_ack = gpio_ack_irq,
- .irq_mask = gpio_mask_irq,
- .irq_unmask = gpio_unmask_irq,
- .irq_set_type = gpio_irq_type,
- .irq_set_wake = gpio_wake_enable,
+ .irq_shutdown = omap_gpio_irq_shutdown,
+ .irq_ack = omap_gpio_ack_irq,
+ .irq_mask = omap_gpio_mask_irq,
+ .irq_unmask = omap_gpio_unmask_irq,
+ .irq_set_type = omap_gpio_irq_type,
+ .irq_set_wake = omap_gpio_wake_enable,
};
/*---------------------------------------------------------------------*/
@@ -918,7 +921,7 @@ static struct platform_device omap_mpuio_device = {
/* could list the /proc/iomem resources */
};
-static inline void mpuio_init(struct gpio_bank *bank)
+static inline void omap_mpuio_init(struct gpio_bank *bank)
{
platform_set_drvdata(&omap_mpuio_device, bank);
@@ -928,7 +931,7 @@ static inline void mpuio_init(struct gpio_bank *bank)
/*---------------------------------------------------------------------*/
-static int gpio_get_direction(struct gpio_chip *chip, unsigned offset)
+static int omap_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
{
struct gpio_bank *bank;
unsigned long flags;
@@ -943,19 +946,19 @@ static int gpio_get_direction(struct gpio_chip *chip, unsigned offset)
return dir;
}
-static int gpio_input(struct gpio_chip *chip, unsigned offset)
+static int omap_gpio_input(struct gpio_chip *chip, unsigned offset)
{
struct gpio_bank *bank;
unsigned long flags;
bank = container_of(chip, struct gpio_bank, chip);
spin_lock_irqsave(&bank->lock, flags);
- _set_gpio_direction(bank, offset, 1);
+ omap_set_gpio_direction(bank, offset, 1);
spin_unlock_irqrestore(&bank->lock, flags);
return 0;
}
-static int gpio_get(struct gpio_chip *chip, unsigned offset)
+static int omap_gpio_get(struct gpio_chip *chip, unsigned offset)
{
struct gpio_bank *bank;
u32 mask;
@@ -963,13 +966,13 @@ static int gpio_get(struct gpio_chip *chip, unsigned offset)
bank = container_of(chip, struct gpio_bank, chip);
mask = (BIT(offset));
- if (gpio_is_input(bank, mask))
- return _get_gpio_datain(bank, offset);
+ if (omap_gpio_is_input(bank, mask))
+ return omap_get_gpio_datain(bank, offset);
else
- return _get_gpio_dataout(bank, offset);
+ return omap_get_gpio_dataout(bank, offset);
}
-static int gpio_output(struct gpio_chip *chip, unsigned offset, int value)
+static int omap_gpio_output(struct gpio_chip *chip, unsigned offset, int value)
{
struct gpio_bank *bank;
unsigned long flags;
@@ -977,13 +980,13 @@ static int gpio_output(struct gpio_chip *chip, unsigned offset, int value)
bank = container_of(chip, struct gpio_bank, chip);
spin_lock_irqsave(&bank->lock, flags);
bank->set_dataout(bank, offset, value);
- _set_gpio_direction(bank, offset, 0);
+ omap_set_gpio_direction(bank, offset, 0);
spin_unlock_irqrestore(&bank->lock, flags);
return 0;
}
-static int gpio_debounce(struct gpio_chip *chip, unsigned offset,
- unsigned debounce)
+static int omap_gpio_debounce(struct gpio_chip *chip, unsigned offset,
+ unsigned debounce)
{
struct gpio_bank *bank;
unsigned long flags;
@@ -991,13 +994,13 @@ static int gpio_debounce(struct gpio_chip *chip, unsigned offset,
bank = container_of(chip, struct gpio_bank, chip);
spin_lock_irqsave(&bank->lock, flags);
- _set_gpio_debounce(bank, offset, debounce);
+ omap2_set_gpio_debounce(bank, offset, debounce);
spin_unlock_irqrestore(&bank->lock, flags);
return 0;
}
-static void gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+static void omap_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
struct gpio_bank *bank;
unsigned long flags;
@@ -1025,11 +1028,6 @@ static void __init omap_gpio_show_rev(struct gpio_bank *bank)
called = true;
}
-/* This lock class tells lockdep that GPIO irqs are in a different
- * category than their parents, so it won't report false recursion.
- */
-static struct lock_class_key gpio_lock_class;
-
static void omap_gpio_mod_init(struct gpio_bank *bank)
{
void __iomem *base = bank->base;
@@ -1043,8 +1041,10 @@ static void omap_gpio_mod_init(struct gpio_bank *bank)
return;
}
- _gpio_rmw(base, bank->regs->irqenable, l, bank->regs->irqenable_inv);
- _gpio_rmw(base, bank->regs->irqstatus, l, !bank->regs->irqenable_inv);
+ omap_gpio_rmw(base, bank->regs->irqenable, l,
+ bank->regs->irqenable_inv);
+ omap_gpio_rmw(base, bank->regs->irqstatus, l,
+ !bank->regs->irqenable_inv);
if (bank->regs->debounce_en)
writel_relaxed(0, base + bank->regs->debounce_en);
@@ -1078,10 +1078,10 @@ omap_mpuio_alloc_gc(struct gpio_bank *bank, unsigned int irq_start,
/* NOTE: No ack required, reading IRQ status clears it. */
ct->chip.irq_mask = irq_gc_mask_set_bit;
ct->chip.irq_unmask = irq_gc_mask_clr_bit;
- ct->chip.irq_set_type = gpio_irq_type;
+ ct->chip.irq_set_type = omap_gpio_irq_type;
if (bank->regs->wkup_en)
- ct->chip.irq_set_wake = gpio_wake_enable;
+ ct->chip.irq_set_wake = omap_gpio_wake_enable;
ct->regs.mask = OMAP_MPUIO_GPIO_INT / bank->stride;
irq_setup_generic_chip(gc, IRQ_MSK(num), IRQ_GC_INIT_MASK_CACHE,
@@ -1101,12 +1101,12 @@ static int omap_gpio_chip_init(struct gpio_bank *bank)
*/
bank->chip.request = omap_gpio_request;
bank->chip.free = omap_gpio_free;
- bank->chip.get_direction = gpio_get_direction;
- bank->chip.direction_input = gpio_input;
- bank->chip.get = gpio_get;
- bank->chip.direction_output = gpio_output;
- bank->chip.set_debounce = gpio_debounce;
- bank->chip.set = gpio_set;
+ bank->chip.get_direction = omap_gpio_get_direction;
+ bank->chip.direction_input = omap_gpio_input;
+ bank->chip.get = omap_gpio_get;
+ bank->chip.direction_output = omap_gpio_output;
+ bank->chip.set_debounce = omap_gpio_debounce;
+ bank->chip.set = omap_gpio_set;
if (bank->is_mpuio) {
bank->chip.label = "mpuio";
if (bank->regs->wkup_en)
@@ -1138,7 +1138,7 @@ static int omap_gpio_chip_init(struct gpio_bank *bank)
#endif
ret = gpiochip_irqchip_add(&bank->chip, &gpio_irq_chip,
- irq_base, gpio_irq_handler,
+ irq_base, omap_gpio_irq_handler,
IRQ_TYPE_NONE);
if (ret) {
@@ -1148,11 +1148,10 @@ static int omap_gpio_chip_init(struct gpio_bank *bank)
}
gpiochip_set_chained_irqchip(&bank->chip, &gpio_irq_chip,
- bank->irq, gpio_irq_handler);
+ bank->irq, omap_gpio_irq_handler);
for (j = 0; j < bank->width; j++) {
int irq = irq_find_mapping(bank->chip.irqdomain, j);
- irq_set_lockdep_class(irq, &gpio_lock_class);
if (bank->is_mpuio) {
omap_mpuio_alloc_gc(bank, irq, bank->width);
irq_set_chip_and_handler(irq, NULL, NULL);
@@ -1217,9 +1216,9 @@ static int omap_gpio_probe(struct platform_device *pdev)
}
if (bank->regs->set_dataout && bank->regs->clr_dataout)
- bank->set_dataout = _set_gpio_dataout_reg;
+ bank->set_dataout = omap_set_gpio_dataout_reg;
else
- bank->set_dataout = _set_gpio_dataout_mask;
+ bank->set_dataout = omap_set_gpio_dataout_mask;
spin_lock_init(&bank->lock);
@@ -1238,7 +1237,7 @@ static int omap_gpio_probe(struct platform_device *pdev)
pm_runtime_get_sync(bank->dev);
if (bank->is_mpuio)
- mpuio_init(bank);
+ omap_mpuio_init(bank);
omap_gpio_mod_init(bank);
@@ -1320,7 +1319,7 @@ update_gpio_context_count:
bank->context_loss_count =
bank->get_context_loss_count(bank->dev);
- _gpio_dbck_disable(bank);
+ omap_gpio_dbck_disable(bank);
spin_unlock_irqrestore(&bank->lock, flags);
return 0;
@@ -1351,7 +1350,7 @@ static int omap_gpio_runtime_resume(struct device *dev)
bank->get_context_loss_count(bank->dev);
}
- _gpio_dbck_enable(bank);
+ omap_gpio_dbck_enable(bank);
/*
* In ->runtime_suspend(), level-triggered, wakeup-enabled
diff --git a/drivers/gpio/gpio-palmas.c b/drivers/gpio/gpio-palmas.c
index 86bdbe362068..171a6389f9ce 100644
--- a/drivers/gpio/gpio-palmas.c
+++ b/drivers/gpio/gpio-palmas.c
@@ -210,7 +210,8 @@ static int palmas_gpio_remove(struct platform_device *pdev)
{
struct palmas_gpio *palmas_gpio = platform_get_drvdata(pdev);
- return gpiochip_remove(&palmas_gpio->gpio_chip);
+ gpiochip_remove(&palmas_gpio->gpio_chip);
+ return 0;
}
static struct platform_driver palmas_gpio_driver = {
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index e721a37c3473..f9961eea2120 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -765,12 +765,7 @@ static int pca953x_remove(struct i2c_client *client)
}
}
- ret = gpiochip_remove(&chip->gpio_chip);
- if (ret) {
- dev_err(&client->dev, "%s failed, %d\n",
- "gpiochip_remove()", ret);
- return ret;
- }
+ gpiochip_remove(&chip->gpio_chip);
return 0;
}
diff --git a/drivers/gpio/gpio-pcf857x.c b/drivers/gpio/gpio-pcf857x.c
index 27b46751ea7e..236708ad0a5b 100644
--- a/drivers/gpio/gpio-pcf857x.c
+++ b/drivers/gpio/gpio-pcf857x.c
@@ -444,9 +444,7 @@ static int pcf857x_remove(struct i2c_client *client)
if (client->irq)
pcf857x_irq_domain_cleanup(gpio);
- status = gpiochip_remove(&gpio->chip);
- if (status)
- dev_err(&client->dev, "%s --> %d\n", "remove", status);
+ gpiochip_remove(&gpio->chip);
return status;
}
diff --git a/drivers/gpio/gpio-pch.c b/drivers/gpio/gpio-pch.c
index d6eac9b17db9..e0ac549dccb5 100644
--- a/drivers/gpio/gpio-pch.c
+++ b/drivers/gpio/gpio-pch.c
@@ -426,9 +426,7 @@ end:
err_request_irq:
irq_free_descs(irq_base, gpio_pins[chip->ioh]);
-
- if (gpiochip_remove(&chip->gpio))
- dev_err(&pdev->dev, "%s gpiochip_remove failed\n", __func__);
+ gpiochip_remove(&chip->gpio);
err_gpiochip_add:
pci_iounmap(pdev, chip->base);
@@ -447,7 +445,6 @@ err_pci_enable:
static void pch_gpio_remove(struct pci_dev *pdev)
{
- int err;
struct pch_gpio *chip = pci_get_drvdata(pdev);
if (chip->irq_base != -1) {
@@ -456,10 +453,7 @@ static void pch_gpio_remove(struct pci_dev *pdev)
irq_free_descs(chip->irq_base, gpio_pins[chip->ioh]);
}
- err = gpiochip_remove(&chip->gpio);
- if (err)
- dev_err(&pdev->dev, "Failed gpiochip_remove\n");
-
+ gpiochip_remove(&chip->gpio);
pci_iounmap(pdev, chip->base);
pci_release_regions(pdev);
pci_disable_device(pdev);
diff --git a/drivers/gpio/gpio-pxa.c b/drivers/gpio/gpio-pxa.c
index 42e6e64f2120..ad3feec0075e 100644
--- a/drivers/gpio/gpio-pxa.c
+++ b/drivers/gpio/gpio-pxa.c
@@ -498,7 +498,7 @@ static int pxa_gpio_nums(struct platform_device *pdev)
}
#ifdef CONFIG_OF
-static struct of_device_id pxa_gpio_dt_ids[] = {
+static const struct of_device_id pxa_gpio_dt_ids[] = {
{ .compatible = "intel,pxa25x-gpio", .data = &pxa25x_id, },
{ .compatible = "intel,pxa26x-gpio", .data = &pxa26x_id, },
{ .compatible = "intel,pxa27x-gpio", .data = &pxa27x_id, },
@@ -649,6 +649,11 @@ static int pxa_gpio_probe(struct platform_device *pdev)
handle_edge_irq);
set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
}
+ } else {
+ if (irq0 > 0)
+ irq_set_chained_handler(irq0, pxa_gpio_demux_handler);
+ if (irq1 > 0)
+ irq_set_chained_handler(irq1, pxa_gpio_demux_handler);
}
irq_set_chained_handler(irq_mux, pxa_gpio_demux_handler);
diff --git a/drivers/gpio/gpio-rc5t583.c b/drivers/gpio/gpio-rc5t583.c
index 562b0c4d9cc8..769233d2da6d 100644
--- a/drivers/gpio/gpio-rc5t583.c
+++ b/drivers/gpio/gpio-rc5t583.c
@@ -148,7 +148,8 @@ static int rc5t583_gpio_remove(struct platform_device *pdev)
{
struct rc5t583_gpio *rc5t583_gpio = platform_get_drvdata(pdev);
- return gpiochip_remove(&rc5t583_gpio->gpio_chip);
+ gpiochip_remove(&rc5t583_gpio->gpio_chip);
+ return 0;
}
static struct platform_driver rc5t583_gpio_driver = {
diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c
index b6ae89ea8811..bf6c09450fee 100644
--- a/drivers/gpio/gpio-rcar.c
+++ b/drivers/gpio/gpio-rcar.c
@@ -240,9 +240,9 @@ static int gpio_rcar_get(struct gpio_chip *chip, unsigned offset)
/* testing on r8a7790 shows that INDT does not show correct pin state
* when configured as output, so use OUTDT in case of output pins */
if (gpio_rcar_read(gpio_to_priv(chip), INOUTSEL) & bit)
- return (int)(gpio_rcar_read(gpio_to_priv(chip), OUTDT) & bit);
+ return !!(gpio_rcar_read(gpio_to_priv(chip), OUTDT) & bit);
else
- return (int)(gpio_rcar_read(gpio_to_priv(chip), INDT) & bit);
+ return !!(gpio_rcar_read(gpio_to_priv(chip), INDT) & bit);
}
static void gpio_rcar_set(struct gpio_chip *chip, unsigned offset, int value)
@@ -472,11 +472,8 @@ err0:
static int gpio_rcar_remove(struct platform_device *pdev)
{
struct gpio_rcar_priv *p = platform_get_drvdata(pdev);
- int ret;
- ret = gpiochip_remove(&p->gpio_chip);
- if (ret)
- return ret;
+ gpiochip_remove(&p->gpio_chip);
irq_domain_remove(p->irq_domain);
pm_runtime_put(&pdev->dev);
diff --git a/drivers/gpio/gpio-rdc321x.c b/drivers/gpio/gpio-rdc321x.c
index 9fa7e53331c9..d729bc8a554d 100644
--- a/drivers/gpio/gpio-rdc321x.c
+++ b/drivers/gpio/gpio-rdc321x.c
@@ -199,14 +199,11 @@ static int rdc321x_gpio_probe(struct platform_device *pdev)
static int rdc321x_gpio_remove(struct platform_device *pdev)
{
- int ret;
struct rdc321x_gpio *rdc321x_gpio_dev = platform_get_drvdata(pdev);
- ret = gpiochip_remove(&rdc321x_gpio_dev->chip);
- if (ret)
- dev_err(&pdev->dev, "failed to unregister chip\n");
+ gpiochip_remove(&rdc321x_gpio_dev->chip);
- return ret;
+ return 0;
}
static struct platform_driver rdc321x_gpio_driver = {
diff --git a/drivers/gpio/gpio-sch.c b/drivers/gpio/gpio-sch.c
index a9b1cd16c848..41e91d70301e 100644
--- a/drivers/gpio/gpio-sch.c
+++ b/drivers/gpio/gpio-sch.c
@@ -290,8 +290,7 @@ static int sch_gpio_probe(struct platform_device *pdev)
return 0;
err_sch_gpio_resume:
- if (gpiochip_remove(&sch_gpio_core))
- dev_err(&pdev->dev, "%s gpiochip_remove failed\n", __func__);
+ gpiochip_remove(&sch_gpio_core);
err_sch_gpio_core:
release_region(res->start, resource_size(res));
@@ -304,23 +303,14 @@ static int sch_gpio_remove(struct platform_device *pdev)
{
struct resource *res;
if (gpio_ba) {
- int err;
- err = gpiochip_remove(&sch_gpio_core);
- if (err)
- dev_err(&pdev->dev, "%s failed, %d\n",
- "gpiochip_remove()", err);
- err = gpiochip_remove(&sch_gpio_resume);
- if (err)
- dev_err(&pdev->dev, "%s failed, %d\n",
- "gpiochip_remove()", err);
+ gpiochip_remove(&sch_gpio_core);
+ gpiochip_remove(&sch_gpio_resume);
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
release_region(res->start, resource_size(res));
gpio_ba = 0;
-
- return err;
}
return 0;
diff --git a/drivers/gpio/gpio-sch311x.c b/drivers/gpio/gpio-sch311x.c
index f942b80ee403..0cb11413e814 100644
--- a/drivers/gpio/gpio-sch311x.c
+++ b/drivers/gpio/gpio-sch311x.c
@@ -291,14 +291,12 @@ static int sch311x_gpio_remove(struct platform_device *pdev)
{
struct sch311x_pdev_data *pdata = pdev->dev.platform_data;
struct sch311x_gpio_priv *priv = platform_get_drvdata(pdev);
- int err, i;
+ int i;
release_region(pdata->runtime_reg + GP1, 6);
for (i = 0; i < ARRAY_SIZE(priv->blocks); i++) {
- err = gpiochip_remove(&priv->blocks[i].chip);
- if (err)
- return err;
+ gpiochip_remove(&priv->blocks[i].chip);
dev_info(&pdev->dev,
"SMSC SCH311x GPIO block %d unregistered.\n", i);
}
diff --git a/drivers/gpio/gpio-sodaville.c b/drivers/gpio/gpio-sodaville.c
index 7c6c518929bc..d8da36cd8123 100644
--- a/drivers/gpio/gpio-sodaville.c
+++ b/drivers/gpio/gpio-sodaville.c
@@ -265,9 +265,7 @@ static void sdv_gpio_remove(struct pci_dev *pdev)
free_irq(pdev->irq, sd);
irq_free_descs(sd->irq_base, SDV_NUM_PUB_GPIOS);
- if (gpiochip_remove(&sd->bgpio.gc))
- dev_err(&pdev->dev, "gpiochip_remove() failed.\n");
-
+ gpiochip_remove(&sd->bgpio.gc);
pci_release_region(pdev, GPIO_BAR);
iounmap(sd->gpio_pub_base);
pci_disable_device(pdev);
diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c
index 628b58494294..845025a57240 100644
--- a/drivers/gpio/gpio-stmpe.c
+++ b/drivers/gpio/gpio-stmpe.c
@@ -10,8 +10,6 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/gpio.h>
-#include <linux/irq.h>
-#include <linux/irqdomain.h>
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/mfd/stmpe.h>
@@ -31,9 +29,7 @@ struct stmpe_gpio {
struct stmpe *stmpe;
struct device *dev;
struct mutex irq_lock;
- struct irq_domain *domain;
unsigned norequest_mask;
-
/* Caches of interrupt control registers for bus_lock */
u8 regs[CACHE_NR_REGS][CACHE_NR_BANKS];
u8 oldregs[CACHE_NR_REGS][CACHE_NR_BANKS];
@@ -101,13 +97,6 @@ static int stmpe_gpio_direction_input(struct gpio_chip *chip,
return stmpe_set_bits(stmpe, reg, mask, 0);
}
-static int stmpe_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
-{
- struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(chip);
-
- return irq_create_mapping(stmpe_gpio->domain, offset);
-}
-
static int stmpe_gpio_request(struct gpio_chip *chip, unsigned offset)
{
struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(chip);
@@ -126,14 +115,14 @@ static struct gpio_chip template_chip = {
.get = stmpe_gpio_get,
.direction_output = stmpe_gpio_direction_output,
.set = stmpe_gpio_set,
- .to_irq = stmpe_gpio_to_irq,
.request = stmpe_gpio_request,
.can_sleep = true,
};
static int stmpe_gpio_irq_set_type(struct irq_data *d, unsigned int type)
{
- struct stmpe_gpio *stmpe_gpio = irq_data_get_irq_chip_data(d);
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(gc);
int offset = d->hwirq;
int regoffset = offset / 8;
int mask = 1 << (offset % 8);
@@ -160,14 +149,16 @@ static int stmpe_gpio_irq_set_type(struct irq_data *d, unsigned int type)
static void stmpe_gpio_irq_lock(struct irq_data *d)
{
- struct stmpe_gpio *stmpe_gpio = irq_data_get_irq_chip_data(d);
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(gc);
mutex_lock(&stmpe_gpio->irq_lock);
}
static void stmpe_gpio_irq_sync_unlock(struct irq_data *d)
{
- struct stmpe_gpio *stmpe_gpio = irq_data_get_irq_chip_data(d);
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(gc);
struct stmpe *stmpe = stmpe_gpio->stmpe;
int num_banks = DIV_ROUND_UP(stmpe->num_gpios, 8);
static const u8 regmap[] = {
@@ -200,7 +191,8 @@ static void stmpe_gpio_irq_sync_unlock(struct irq_data *d)
static void stmpe_gpio_irq_mask(struct irq_data *d)
{
- struct stmpe_gpio *stmpe_gpio = irq_data_get_irq_chip_data(d);
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(gc);
int offset = d->hwirq;
int regoffset = offset / 8;
int mask = 1 << (offset % 8);
@@ -210,7 +202,8 @@ static void stmpe_gpio_irq_mask(struct irq_data *d)
static void stmpe_gpio_irq_unmask(struct irq_data *d)
{
- struct stmpe_gpio *stmpe_gpio = irq_data_get_irq_chip_data(d);
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(gc);
int offset = d->hwirq;
int regoffset = offset / 8;
int mask = 1 << (offset % 8);
@@ -253,7 +246,7 @@ static irqreturn_t stmpe_gpio_irq(int irq, void *dev)
while (stat) {
int bit = __ffs(stat);
int line = bank * 8 + bit;
- int child_irq = irq_find_mapping(stmpe_gpio->domain,
+ int child_irq = irq_find_mapping(stmpe_gpio->chip.irqdomain,
line);
handle_nested_irq(child_irq);
@@ -271,56 +264,6 @@ static irqreturn_t stmpe_gpio_irq(int irq, void *dev)
return IRQ_HANDLED;
}
-static int stmpe_gpio_irq_map(struct irq_domain *d, unsigned int irq,
- irq_hw_number_t hwirq)
-{
- struct stmpe_gpio *stmpe_gpio = d->host_data;
-
- if (!stmpe_gpio)
- return -EINVAL;
-
- irq_set_chip_data(irq, stmpe_gpio);
- irq_set_chip_and_handler(irq, &stmpe_gpio_irq_chip,
- handle_simple_irq);
- irq_set_nested_thread(irq, 1);
-#ifdef CONFIG_ARM
- set_irq_flags(irq, IRQF_VALID);
-#else
- irq_set_noprobe(irq);
-#endif
-
- return 0;
-}
-
-static void stmpe_gpio_irq_unmap(struct irq_domain *d, unsigned int irq)
-{
-#ifdef CONFIG_ARM
- set_irq_flags(irq, 0);
-#endif
- irq_set_chip_and_handler(irq, NULL, NULL);
- irq_set_chip_data(irq, NULL);
-}
-
-static const struct irq_domain_ops stmpe_gpio_irq_simple_ops = {
- .unmap = stmpe_gpio_irq_unmap,
- .map = stmpe_gpio_irq_map,
- .xlate = irq_domain_xlate_twocell,
-};
-
-static int stmpe_gpio_irq_init(struct stmpe_gpio *stmpe_gpio,
- struct device_node *np)
-{
- stmpe_gpio->domain = irq_domain_add_simple(np,
- stmpe_gpio->chip.ngpio, 0,
- &stmpe_gpio_irq_simple_ops, stmpe_gpio);
- if (!stmpe_gpio->domain) {
- dev_err(stmpe_gpio->dev, "failed to create irqdomain\n");
- return -ENOSYS;
- }
-
- return 0;
-}
-
static int stmpe_gpio_probe(struct platform_device *pdev)
{
struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent);
@@ -358,30 +301,37 @@ static int stmpe_gpio_probe(struct platform_device *pdev)
if (irq < 0)
dev_info(&pdev->dev,
- "device configured in no-irq mode; "
+ "device configured in no-irq mode: "
"irqs are not available\n");
ret = stmpe_enable(stmpe, STMPE_BLOCK_GPIO);
if (ret)
goto out_free;
- if (irq >= 0) {
- ret = stmpe_gpio_irq_init(stmpe_gpio, np);
- if (ret)
- goto out_disable;
-
- ret = request_threaded_irq(irq, NULL, stmpe_gpio_irq,
- IRQF_ONESHOT, "stmpe-gpio", stmpe_gpio);
+ if (irq > 0) {
+ ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+ stmpe_gpio_irq, IRQF_ONESHOT,
+ "stmpe-gpio", stmpe_gpio);
if (ret) {
dev_err(&pdev->dev, "unable to get irq: %d\n", ret);
goto out_disable;
}
+ ret = gpiochip_irqchip_add(&stmpe_gpio->chip,
+ &stmpe_gpio_irq_chip,
+ 0,
+ handle_simple_irq,
+ IRQ_TYPE_NONE);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "could not connect irqchip to gpiochip\n");
+ return ret;
+ }
}
ret = gpiochip_add(&stmpe_gpio->chip);
if (ret) {
dev_err(&pdev->dev, "unable to add gpiochip: %d\n", ret);
- goto out_freeirq;
+ goto out_disable;
}
if (pdata && pdata->setup)
@@ -391,9 +341,6 @@ static int stmpe_gpio_probe(struct platform_device *pdev)
return 0;
-out_freeirq:
- if (irq >= 0)
- free_irq(irq, stmpe_gpio);
out_disable:
stmpe_disable(stmpe, STMPE_BLOCK_GPIO);
out_free:
@@ -406,24 +353,14 @@ static int stmpe_gpio_remove(struct platform_device *pdev)
struct stmpe_gpio *stmpe_gpio = platform_get_drvdata(pdev);
struct stmpe *stmpe = stmpe_gpio->stmpe;
struct stmpe_gpio_platform_data *pdata = stmpe->pdata->gpio;
- int irq = platform_get_irq(pdev, 0);
- int ret;
if (pdata && pdata->remove)
pdata->remove(stmpe, stmpe_gpio->chip.base);
- ret = gpiochip_remove(&stmpe_gpio->chip);
- if (ret < 0) {
- dev_err(stmpe_gpio->dev,
- "unable to remove gpiochip: %d\n", ret);
- return ret;
- }
+ gpiochip_remove(&stmpe_gpio->chip);
stmpe_disable(stmpe, STMPE_BLOCK_GPIO);
- if (irq >= 0)
- free_irq(irq, stmpe_gpio);
-
kfree(stmpe_gpio);
return 0;
diff --git a/drivers/gpio/gpio-sx150x.c b/drivers/gpio/gpio-sx150x.c
index b51ca9f5c140..bce6c6108f20 100644
--- a/drivers/gpio/gpio-sx150x.c
+++ b/drivers/gpio/gpio-sx150x.c
@@ -615,19 +615,16 @@ static int sx150x_probe(struct i2c_client *client,
return 0;
probe_fail_post_gpiochip_add:
- WARN_ON(gpiochip_remove(&chip->gpio_chip) < 0);
+ gpiochip_remove(&chip->gpio_chip);
return rc;
}
static int sx150x_remove(struct i2c_client *client)
{
struct sx150x_chip *chip;
- int rc;
chip = i2c_get_clientdata(client);
- rc = gpiochip_remove(&chip->gpio_chip);
- if (rc < 0)
- return rc;
+ gpiochip_remove(&chip->gpio_chip);
if (chip->irq_summary >= 0)
sx150x_remove_irq_chip(chip);
diff --git a/drivers/gpio/gpio-syscon.c b/drivers/gpio/gpio-syscon.c
index b50fe1297748..30884fbc750d 100644
--- a/drivers/gpio/gpio-syscon.c
+++ b/drivers/gpio/gpio-syscon.c
@@ -172,7 +172,8 @@ static int syscon_gpio_remove(struct platform_device *pdev)
{
struct syscon_gpio_priv *priv = platform_get_drvdata(pdev);
- return gpiochip_remove(&priv->chip);
+ gpiochip_remove(&priv->chip);
+ return 0;
}
static struct platform_driver syscon_gpio_driver = {
diff --git a/drivers/gpio/gpio-tb10x.c b/drivers/gpio/gpio-tb10x.c
index 07bce97647a6..9e615be8032c 100644
--- a/drivers/gpio/gpio-tb10x.c
+++ b/drivers/gpio/gpio-tb10x.c
@@ -291,7 +291,6 @@ fail_ioremap:
static int __exit tb10x_gpio_remove(struct platform_device *pdev)
{
struct tb10x_gpio *tb10x_gpio = platform_get_drvdata(pdev);
- int ret;
if (tb10x_gpio->gc.to_irq) {
irq_remove_generic_chip(tb10x_gpio->domain->gc->gc[0],
@@ -300,9 +299,7 @@ static int __exit tb10x_gpio_remove(struct platform_device *pdev)
irq_domain_remove(tb10x_gpio->domain);
free_irq(tb10x_gpio->irq, tb10x_gpio);
}
- ret = gpiochip_remove(&tb10x_gpio->gc);
- if (ret)
- return ret;
+ gpiochip_remove(&tb10x_gpio->gc);
return 0;
}
diff --git a/drivers/gpio/gpio-tc3589x.c b/drivers/gpio/gpio-tc3589x.c
index 51f7cbd9ff71..7324869c38e0 100644
--- a/drivers/gpio/gpio-tc3589x.c
+++ b/drivers/gpio/gpio-tc3589x.c
@@ -313,17 +313,11 @@ static int tc3589x_gpio_remove(struct platform_device *pdev)
struct tc3589x_gpio *tc3589x_gpio = platform_get_drvdata(pdev);
struct tc3589x *tc3589x = tc3589x_gpio->tc3589x;
struct tc3589x_gpio_platform_data *pdata = tc3589x->pdata->gpio;
- int ret;
if (pdata && pdata->remove)
pdata->remove(tc3589x, tc3589x_gpio->chip.base);
- ret = gpiochip_remove(&tc3589x_gpio->chip);
- if (ret < 0) {
- dev_err(tc3589x_gpio->dev,
- "unable to remove gpiochip: %d\n", ret);
- return ret;
- }
+ gpiochip_remove(&tc3589x_gpio->chip);
return 0;
}
diff --git a/drivers/gpio/gpio-timberdale.c b/drivers/gpio/gpio-timberdale.c
index efc7c129016d..a685a3cbbc81 100644
--- a/drivers/gpio/gpio-timberdale.c
+++ b/drivers/gpio/gpio-timberdale.c
@@ -307,7 +307,6 @@ static int timbgpio_probe(struct platform_device *pdev)
static int timbgpio_remove(struct platform_device *pdev)
{
- int err;
struct timbgpio_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct timbgpio *tgpio = platform_get_drvdata(pdev);
int irq = platform_get_irq(pdev, 0);
@@ -323,9 +322,7 @@ static int timbgpio_remove(struct platform_device *pdev)
irq_set_handler_data(irq, NULL);
}
- err = gpiochip_remove(&tgpio->gpio);
- if (err)
- printk(KERN_ERR DRIVER_NAME": failed to remove gpio_chip\n");
+ gpiochip_remove(&tgpio->gpio);
return 0;
}
diff --git a/drivers/gpio/gpio-tps6586x.c b/drivers/gpio/gpio-tps6586x.c
index a69fbea41253..9c9238e838a9 100644
--- a/drivers/gpio/gpio-tps6586x.c
+++ b/drivers/gpio/gpio-tps6586x.c
@@ -137,7 +137,8 @@ static int tps6586x_gpio_remove(struct platform_device *pdev)
{
struct tps6586x_gpio *tps6586x_gpio = platform_get_drvdata(pdev);
- return gpiochip_remove(&tps6586x_gpio->gpio_chip);
+ gpiochip_remove(&tps6586x_gpio->gpio_chip);
+ return 0;
}
static struct platform_driver tps6586x_gpio_driver = {
diff --git a/drivers/gpio/gpio-tps65910.c b/drivers/gpio/gpio-tps65910.c
index e2f8cda235ea..88f1f5ff4e96 100644
--- a/drivers/gpio/gpio-tps65910.c
+++ b/drivers/gpio/gpio-tps65910.c
@@ -190,7 +190,8 @@ static int tps65910_gpio_remove(struct platform_device *pdev)
{
struct tps65910_gpio *tps65910_gpio = platform_get_drvdata(pdev);
- return gpiochip_remove(&tps65910_gpio->gpio_chip);
+ gpiochip_remove(&tps65910_gpio->gpio_chip);
+ return 0;
}
static struct platform_driver tps65910_gpio_driver = {
diff --git a/drivers/gpio/gpio-tps65912.c b/drivers/gpio/gpio-tps65912.c
index 59ee486cb8b9..22052d84c63b 100644
--- a/drivers/gpio/gpio-tps65912.c
+++ b/drivers/gpio/gpio-tps65912.c
@@ -117,7 +117,8 @@ static int tps65912_gpio_remove(struct platform_device *pdev)
{
struct tps65912_gpio_data *tps65912_gpio = platform_get_drvdata(pdev);
- return gpiochip_remove(&tps65912_gpio->gpio_chip);
+ gpiochip_remove(&tps65912_gpio->gpio_chip);
+ return 0;
}
static struct platform_driver tps65912_gpio_driver = {
diff --git a/drivers/gpio/gpio-ts5500.c b/drivers/gpio/gpio-ts5500.c
index 3df3ebdb3e52..de18591ff11e 100644
--- a/drivers/gpio/gpio-ts5500.c
+++ b/drivers/gpio/gpio-ts5500.c
@@ -427,8 +427,7 @@ static int ts5500_dio_probe(struct platform_device *pdev)
return 0;
cleanup:
- if (gpiochip_remove(&priv->gpio_chip))
- dev_err(dev, "failed to remove gpio chip\n");
+ gpiochip_remove(&priv->gpio_chip);
return ret;
}
@@ -437,7 +436,8 @@ static int ts5500_dio_remove(struct platform_device *pdev)
struct ts5500_priv *priv = platform_get_drvdata(pdev);
ts5500_disable_irq(priv);
- return gpiochip_remove(&priv->gpio_chip);
+ gpiochip_remove(&priv->gpio_chip);
+ return 0;
}
static struct platform_device_id ts5500_dio_ids[] = {
diff --git a/drivers/gpio/gpio-twl4030.c b/drivers/gpio/gpio-twl4030.c
index 3ebb1a5ff22e..118828b3736f 100644
--- a/drivers/gpio/gpio-twl4030.c
+++ b/drivers/gpio/gpio-twl4030.c
@@ -554,7 +554,7 @@ no_irqs:
platform_set_drvdata(pdev, priv);
- if (pdata && pdata->setup) {
+ if (pdata->setup) {
int status;
status = pdata->setup(&pdev->dev, priv->gpio_chip.base,
@@ -583,9 +583,7 @@ static int gpio_twl4030_remove(struct platform_device *pdev)
}
}
- status = gpiochip_remove(&priv->gpio_chip);
- if (status < 0)
- return status;
+ gpiochip_remove(&priv->gpio_chip);
if (is_module())
return 0;
diff --git a/drivers/gpio/gpio-twl6040.c b/drivers/gpio/gpio-twl6040.c
index 0caf5cd1b47d..f28e04b88aa9 100644
--- a/drivers/gpio/gpio-twl6040.c
+++ b/drivers/gpio/gpio-twl6040.c
@@ -111,7 +111,8 @@ static int gpo_twl6040_probe(struct platform_device *pdev)
static int gpo_twl6040_remove(struct platform_device *pdev)
{
- return gpiochip_remove(&twl6040gpo_chip);
+ gpiochip_remove(&twl6040gpo_chip);
+ return 0;
}
/* Note: this hardware lives inside an I2C-based multi-function device. */
diff --git a/drivers/gpio/gpio-ucb1400.c b/drivers/gpio/gpio-ucb1400.c
index 2445fe771179..d502825159b9 100644
--- a/drivers/gpio/gpio-ucb1400.c
+++ b/drivers/gpio/gpio-ucb1400.c
@@ -70,7 +70,7 @@ static int ucb1400_gpio_probe(struct platform_device *dev)
if (err)
goto err;
- if (ucb && ucb->gpio_setup)
+ if (ucb->gpio_setup)
err = ucb->gpio_setup(&dev->dev, ucb->gc.ngpio);
err:
@@ -89,7 +89,7 @@ static int ucb1400_gpio_remove(struct platform_device *dev)
return err;
}
- err = gpiochip_remove(&ucb->gc);
+ gpiochip_remove(&ucb->gc);
return err;
}
diff --git a/drivers/gpio/gpio-viperboard.c b/drivers/gpio/gpio-viperboard.c
index 79e3b5836712..e2a11f27807f 100644
--- a/drivers/gpio/gpio-viperboard.c
+++ b/drivers/gpio/gpio-viperboard.c
@@ -446,8 +446,7 @@ static int vprbrd_gpio_probe(struct platform_device *pdev)
return ret;
err_gpiob:
- if (gpiochip_remove(&vb_gpio->gpioa))
- dev_err(&pdev->dev, "%s gpiochip_remove failed\n", __func__);
+ gpiochip_remove(&vb_gpio->gpioa);
err_gpioa:
return ret;
@@ -456,13 +455,10 @@ err_gpioa:
static int vprbrd_gpio_remove(struct platform_device *pdev)
{
struct vprbrd_gpio *vb_gpio = platform_get_drvdata(pdev);
- int ret;
- ret = gpiochip_remove(&vb_gpio->gpiob);
- if (ret == 0)
- ret = gpiochip_remove(&vb_gpio->gpioa);
+ gpiochip_remove(&vb_gpio->gpiob);
- return ret;
+ return 0;
}
static struct platform_driver vprbrd_gpio_driver = {
diff --git a/drivers/gpio/gpio-vr41xx.c b/drivers/gpio/gpio-vr41xx.c
index 66cbcc108e62..dbf28fa03f67 100644
--- a/drivers/gpio/gpio-vr41xx.c
+++ b/drivers/gpio/gpio-vr41xx.c
@@ -515,7 +515,7 @@ static int giu_probe(struct platform_device *pdev)
struct resource *res;
unsigned int trigger, i, pin;
struct irq_chip *chip;
- int irq, retval;
+ int irq, ret;
switch (pdev->id) {
case GPIO_50PINS_PULLUPDOWN:
@@ -544,7 +544,11 @@ static int giu_probe(struct platform_device *pdev)
vr41xx_gpio_chip.dev = &pdev->dev;
- retval = gpiochip_add(&vr41xx_gpio_chip);
+ ret = gpiochip_add(&vr41xx_gpio_chip);
+ if (!ret) {
+ iounmap(giu_base);
+ return -ENODEV;
+ }
giu_write(GIUINTENL, 0);
giu_write(GIUINTENH, 0);
diff --git a/drivers/gpio/gpio-vx855.c b/drivers/gpio/gpio-vx855.c
index 0fd23b6a753d..85971d4e23c1 100644
--- a/drivers/gpio/gpio-vx855.c
+++ b/drivers/gpio/gpio-vx855.c
@@ -288,8 +288,7 @@ static int vx855gpio_remove(struct platform_device *pdev)
struct vx855_gpio *vg = platform_get_drvdata(pdev);
struct resource *res;
- if (gpiochip_remove(&vg->gpio))
- dev_err(&pdev->dev, "unable to remove gpio_chip?\n");
+ gpiochip_remove(&vg->gpio);
if (vg->gpi_reserved) {
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
diff --git a/drivers/gpio/gpio-wm831x.c b/drivers/gpio/gpio-wm831x.c
index b18a1a26425e..58ce75c188b7 100644
--- a/drivers/gpio/gpio-wm831x.c
+++ b/drivers/gpio/gpio-wm831x.c
@@ -279,7 +279,8 @@ static int wm831x_gpio_remove(struct platform_device *pdev)
{
struct wm831x_gpio *wm831x_gpio = platform_get_drvdata(pdev);
- return gpiochip_remove(&wm831x_gpio->gpio_chip);
+ gpiochip_remove(&wm831x_gpio->gpio_chip);
+ return 0;
}
static struct platform_driver wm831x_gpio_driver = {
diff --git a/drivers/gpio/gpio-wm8350.c b/drivers/gpio/gpio-wm8350.c
index 2487f9d575d3..060b89303bb6 100644
--- a/drivers/gpio/gpio-wm8350.c
+++ b/drivers/gpio/gpio-wm8350.c
@@ -145,7 +145,8 @@ static int wm8350_gpio_remove(struct platform_device *pdev)
{
struct wm8350_gpio_data *wm8350_gpio = platform_get_drvdata(pdev);
- return gpiochip_remove(&wm8350_gpio->gpio_chip);
+ gpiochip_remove(&wm8350_gpio->gpio_chip);
+ return 0;
}
static struct platform_driver wm8350_gpio_driver = {
diff --git a/drivers/gpio/gpio-wm8994.c b/drivers/gpio/gpio-wm8994.c
index d93b6b581677..6f5e42db4b9e 100644
--- a/drivers/gpio/gpio-wm8994.c
+++ b/drivers/gpio/gpio-wm8994.c
@@ -285,7 +285,8 @@ static int wm8994_gpio_remove(struct platform_device *pdev)
{
struct wm8994_gpio *wm8994_gpio = platform_get_drvdata(pdev);
- return gpiochip_remove(&wm8994_gpio->gpio_chip);
+ gpiochip_remove(&wm8994_gpio->gpio_chip);
+ return 0;
}
static struct platform_driver wm8994_gpio_driver = {
diff --git a/drivers/gpio/gpio-zynq.c b/drivers/gpio/gpio-zynq.c
new file mode 100644
index 000000000000..c3145f91fda3
--- /dev/null
+++ b/drivers/gpio/gpio-zynq.c
@@ -0,0 +1,692 @@
+/*
+ * Xilinx Zynq GPIO device driver
+ *
+ * Copyright (C) 2009 - 2014 Xilinx, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any later
+ * version.
+ */
+
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/gpio/driver.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#define DRIVER_NAME "zynq-gpio"
+
+/* Maximum banks */
+#define ZYNQ_GPIO_MAX_BANK 4
+
+#define ZYNQ_GPIO_BANK0_NGPIO 32
+#define ZYNQ_GPIO_BANK1_NGPIO 22
+#define ZYNQ_GPIO_BANK2_NGPIO 32
+#define ZYNQ_GPIO_BANK3_NGPIO 32
+
+#define ZYNQ_GPIO_NR_GPIOS (ZYNQ_GPIO_BANK0_NGPIO + \
+ ZYNQ_GPIO_BANK1_NGPIO + \
+ ZYNQ_GPIO_BANK2_NGPIO + \
+ ZYNQ_GPIO_BANK3_NGPIO)
+
+#define ZYNQ_GPIO_BANK0_PIN_MIN 0
+#define ZYNQ_GPIO_BANK0_PIN_MAX (ZYNQ_GPIO_BANK0_PIN_MIN + \
+ ZYNQ_GPIO_BANK0_NGPIO - 1)
+#define ZYNQ_GPIO_BANK1_PIN_MIN (ZYNQ_GPIO_BANK0_PIN_MAX + 1)
+#define ZYNQ_GPIO_BANK1_PIN_MAX (ZYNQ_GPIO_BANK1_PIN_MIN + \
+ ZYNQ_GPIO_BANK1_NGPIO - 1)
+#define ZYNQ_GPIO_BANK2_PIN_MIN (ZYNQ_GPIO_BANK1_PIN_MAX + 1)
+#define ZYNQ_GPIO_BANK2_PIN_MAX (ZYNQ_GPIO_BANK2_PIN_MIN + \
+ ZYNQ_GPIO_BANK2_NGPIO - 1)
+#define ZYNQ_GPIO_BANK3_PIN_MIN (ZYNQ_GPIO_BANK2_PIN_MAX + 1)
+#define ZYNQ_GPIO_BANK3_PIN_MAX (ZYNQ_GPIO_BANK3_PIN_MIN + \
+ ZYNQ_GPIO_BANK3_NGPIO - 1)
+
+
+/* Register offsets for the GPIO device */
+/* LSW Mask & Data -WO */
+#define ZYNQ_GPIO_DATA_LSW_OFFSET(BANK) (0x000 + (8 * BANK))
+/* MSW Mask & Data -WO */
+#define ZYNQ_GPIO_DATA_MSW_OFFSET(BANK) (0x004 + (8 * BANK))
+/* Data Register-RW */
+#define ZYNQ_GPIO_DATA_RO_OFFSET(BANK) (0x060 + (4 * BANK))
+/* Direction mode reg-RW */
+#define ZYNQ_GPIO_DIRM_OFFSET(BANK) (0x204 + (0x40 * BANK))
+/* Output enable reg-RW */
+#define ZYNQ_GPIO_OUTEN_OFFSET(BANK) (0x208 + (0x40 * BANK))
+/* Interrupt mask reg-RO */
+#define ZYNQ_GPIO_INTMASK_OFFSET(BANK) (0x20C + (0x40 * BANK))
+/* Interrupt enable reg-WO */
+#define ZYNQ_GPIO_INTEN_OFFSET(BANK) (0x210 + (0x40 * BANK))
+/* Interrupt disable reg-WO */
+#define ZYNQ_GPIO_INTDIS_OFFSET(BANK) (0x214 + (0x40 * BANK))
+/* Interrupt status reg-RO */
+#define ZYNQ_GPIO_INTSTS_OFFSET(BANK) (0x218 + (0x40 * BANK))
+/* Interrupt type reg-RW */
+#define ZYNQ_GPIO_INTTYPE_OFFSET(BANK) (0x21C + (0x40 * BANK))
+/* Interrupt polarity reg-RW */
+#define ZYNQ_GPIO_INTPOL_OFFSET(BANK) (0x220 + (0x40 * BANK))
+/* Interrupt on any, reg-RW */
+#define ZYNQ_GPIO_INTANY_OFFSET(BANK) (0x224 + (0x40 * BANK))
+
+/* Disable all interrupts mask */
+#define ZYNQ_GPIO_IXR_DISABLE_ALL 0xFFFFFFFF
+
+/* Mid pin number of a bank */
+#define ZYNQ_GPIO_MID_PIN_NUM 16
+
+/* GPIO upper 16 bit mask */
+#define ZYNQ_GPIO_UPPER_MASK 0xFFFF0000
+
+/**
+ * struct zynq_gpio - gpio device private data structure
+ * @chip: instance of the gpio_chip
+ * @base_addr: base address of the GPIO device
+ * @clk: clock resource for this controller
+ */
+struct zynq_gpio {
+ struct gpio_chip chip;
+ void __iomem *base_addr;
+ struct clk *clk;
+};
+
+/**
+ * zynq_gpio_get_bank_pin - Get the bank number and pin number within that bank
+ * for a given pin in the GPIO device
+ * @pin_num: gpio pin number within the device
+ * @bank_num: an output parameter used to return the bank number of the gpio
+ * pin
+ * @bank_pin_num: an output parameter used to return pin number within a bank
+ * for the given gpio pin
+ *
+ * Returns the bank number and pin offset within the bank.
+ */
+static inline void zynq_gpio_get_bank_pin(unsigned int pin_num,
+ unsigned int *bank_num,
+ unsigned int *bank_pin_num)
+{
+ switch (pin_num) {
+ case ZYNQ_GPIO_BANK0_PIN_MIN ... ZYNQ_GPIO_BANK0_PIN_MAX:
+ *bank_num = 0;
+ *bank_pin_num = pin_num;
+ break;
+ case ZYNQ_GPIO_BANK1_PIN_MIN ... ZYNQ_GPIO_BANK1_PIN_MAX:
+ *bank_num = 1;
+ *bank_pin_num = pin_num - ZYNQ_GPIO_BANK1_PIN_MIN;
+ break;
+ case ZYNQ_GPIO_BANK2_PIN_MIN ... ZYNQ_GPIO_BANK2_PIN_MAX:
+ *bank_num = 2;
+ *bank_pin_num = pin_num - ZYNQ_GPIO_BANK2_PIN_MIN;
+ break;
+ case ZYNQ_GPIO_BANK3_PIN_MIN ... ZYNQ_GPIO_BANK3_PIN_MAX:
+ *bank_num = 3;
+ *bank_pin_num = pin_num - ZYNQ_GPIO_BANK3_PIN_MIN;
+ break;
+ default:
+ WARN(true, "invalid GPIO pin number: %u", pin_num);
+ *bank_num = 0;
+ *bank_pin_num = 0;
+ break;
+ }
+}
+
+/**
+ * zynq_gpio_get_value - Get the state of the specified pin of GPIO device
+ * @chip: gpio_chip instance to be worked on
+ * @pin: gpio pin number within the device
+ *
+ * This function reads the state of the specified pin of the GPIO device.
+ *
+ * Return: 0 if the pin is low, 1 if pin is high.
+ */
+static int zynq_gpio_get_value(struct gpio_chip *chip, unsigned int pin)
+{
+ u32 data;
+ unsigned int bank_num, bank_pin_num;
+ struct zynq_gpio *gpio = container_of(chip, struct zynq_gpio, chip);
+
+ zynq_gpio_get_bank_pin(pin, &bank_num, &bank_pin_num);
+
+ data = readl_relaxed(gpio->base_addr +
+ ZYNQ_GPIO_DATA_RO_OFFSET(bank_num));
+
+ return (data >> bank_pin_num) & 1;
+}
+
+/**
+ * zynq_gpio_set_value - Modify the state of the pin with specified value
+ * @chip: gpio_chip instance to be worked on
+ * @pin: gpio pin number within the device
+ * @state: value used to modify the state of the specified pin
+ *
+ * This function calculates the register offset (i.e to lower 16 bits or
+ * upper 16 bits) based on the given pin number and sets the state of a
+ * gpio pin to the specified value. The state is either 0 or non-zero.
+ */
+static void zynq_gpio_set_value(struct gpio_chip *chip, unsigned int pin,
+ int state)
+{
+ unsigned int reg_offset, bank_num, bank_pin_num;
+ struct zynq_gpio *gpio = container_of(chip, struct zynq_gpio, chip);
+
+ zynq_gpio_get_bank_pin(pin, &bank_num, &bank_pin_num);
+
+ if (bank_pin_num >= ZYNQ_GPIO_MID_PIN_NUM) {
+ /* only 16 data bits in bit maskable reg */
+ bank_pin_num -= ZYNQ_GPIO_MID_PIN_NUM;
+ reg_offset = ZYNQ_GPIO_DATA_MSW_OFFSET(bank_num);
+ } else {
+ reg_offset = ZYNQ_GPIO_DATA_LSW_OFFSET(bank_num);
+ }
+
+ /*
+ * get the 32 bit value to be written to the mask/data register where
+ * the upper 16 bits is the mask and lower 16 bits is the data
+ */
+ state = !!state;
+ state = ~(1 << (bank_pin_num + ZYNQ_GPIO_MID_PIN_NUM)) &
+ ((state << bank_pin_num) | ZYNQ_GPIO_UPPER_MASK);
+
+ writel_relaxed(state, gpio->base_addr + reg_offset);
+}
+
+/**
+ * zynq_gpio_dir_in - Set the direction of the specified GPIO pin as input
+ * @chip: gpio_chip instance to be worked on
+ * @pin: gpio pin number within the device
+ *
+ * This function uses the read-modify-write sequence to set the direction of
+ * the gpio pin as input.
+ *
+ * Return: 0 always
+ */
+static int zynq_gpio_dir_in(struct gpio_chip *chip, unsigned int pin)
+{
+ u32 reg;
+ unsigned int bank_num, bank_pin_num;
+ struct zynq_gpio *gpio = container_of(chip, struct zynq_gpio, chip);
+
+ zynq_gpio_get_bank_pin(pin, &bank_num, &bank_pin_num);
+
+ /* bank 0 pins 7 and 8 are special and cannot be used as inputs */
+ if (bank_num == 0 && (bank_pin_num == 7 || bank_pin_num == 8))
+ return -EINVAL;
+
+ /* clear the bit in direction mode reg to set the pin as input */
+ reg = readl_relaxed(gpio->base_addr + ZYNQ_GPIO_DIRM_OFFSET(bank_num));
+ reg &= ~BIT(bank_pin_num);
+ writel_relaxed(reg, gpio->base_addr + ZYNQ_GPIO_DIRM_OFFSET(bank_num));
+
+ return 0;
+}
+
+/**
+ * zynq_gpio_dir_out - Set the direction of the specified GPIO pin as output
+ * @chip: gpio_chip instance to be worked on
+ * @pin: gpio pin number within the device
+ * @state: value to be written to specified pin
+ *
+ * This function sets the direction of specified GPIO pin as output, configures
+ * the Output Enable register for the pin and uses zynq_gpio_set to set
+ * the state of the pin to the value specified.
+ *
+ * Return: 0 always
+ */
+static int zynq_gpio_dir_out(struct gpio_chip *chip, unsigned int pin,
+ int state)
+{
+ u32 reg;
+ unsigned int bank_num, bank_pin_num;
+ struct zynq_gpio *gpio = container_of(chip, struct zynq_gpio, chip);
+
+ zynq_gpio_get_bank_pin(pin, &bank_num, &bank_pin_num);
+
+ /* set the GPIO pin as output */
+ reg = readl_relaxed(gpio->base_addr + ZYNQ_GPIO_DIRM_OFFSET(bank_num));
+ reg |= BIT(bank_pin_num);
+ writel_relaxed(reg, gpio->base_addr + ZYNQ_GPIO_DIRM_OFFSET(bank_num));
+
+ /* configure the output enable reg for the pin */
+ reg = readl_relaxed(gpio->base_addr + ZYNQ_GPIO_OUTEN_OFFSET(bank_num));
+ reg |= BIT(bank_pin_num);
+ writel_relaxed(reg, gpio->base_addr + ZYNQ_GPIO_OUTEN_OFFSET(bank_num));
+
+ /* set the state of the pin */
+ zynq_gpio_set_value(chip, pin, state);
+ return 0;
+}
+
+/**
+ * zynq_gpio_irq_mask - Disable the interrupts for a gpio pin
+ * @irq_data: per irq and chip data passed down to chip functions
+ *
+ * This function calculates gpio pin number from irq number and sets the
+ * bit in the Interrupt Disable register of the corresponding bank to disable
+ * interrupts for that pin.
+ */
+static void zynq_gpio_irq_mask(struct irq_data *irq_data)
+{
+ unsigned int device_pin_num, bank_num, bank_pin_num;
+ struct zynq_gpio *gpio = irq_data_get_irq_chip_data(irq_data);
+
+ device_pin_num = irq_data->hwirq;
+ zynq_gpio_get_bank_pin(device_pin_num, &bank_num, &bank_pin_num);
+ writel_relaxed(BIT(bank_pin_num),
+ gpio->base_addr + ZYNQ_GPIO_INTDIS_OFFSET(bank_num));
+}
+
+/**
+ * zynq_gpio_irq_unmask - Enable the interrupts for a gpio pin
+ * @irq_data: irq data containing irq number of gpio pin for the interrupt
+ * to enable
+ *
+ * This function calculates the gpio pin number from irq number and sets the
+ * bit in the Interrupt Enable register of the corresponding bank to enable
+ * interrupts for that pin.
+ */
+static void zynq_gpio_irq_unmask(struct irq_data *irq_data)
+{
+ unsigned int device_pin_num, bank_num, bank_pin_num;
+ struct zynq_gpio *gpio = irq_data_get_irq_chip_data(irq_data);
+
+ device_pin_num = irq_data->hwirq;
+ zynq_gpio_get_bank_pin(device_pin_num, &bank_num, &bank_pin_num);
+ writel_relaxed(BIT(bank_pin_num),
+ gpio->base_addr + ZYNQ_GPIO_INTEN_OFFSET(bank_num));
+}
+
+/**
+ * zynq_gpio_irq_ack - Acknowledge the interrupt of a gpio pin
+ * @irq_data: irq data containing irq number of gpio pin for the interrupt
+ * to ack
+ *
+ * This function calculates gpio pin number from irq number and sets the bit
+ * in the Interrupt Status Register of the corresponding bank, to ACK the irq.
+ */
+static void zynq_gpio_irq_ack(struct irq_data *irq_data)
+{
+ unsigned int device_pin_num, bank_num, bank_pin_num;
+ struct zynq_gpio *gpio = irq_data_get_irq_chip_data(irq_data);
+
+ device_pin_num = irq_data->hwirq;
+ zynq_gpio_get_bank_pin(device_pin_num, &bank_num, &bank_pin_num);
+ writel_relaxed(BIT(bank_pin_num),
+ gpio->base_addr + ZYNQ_GPIO_INTSTS_OFFSET(bank_num));
+}
+
+/**
+ * zynq_gpio_irq_enable - Enable the interrupts for a gpio pin
+ * @irq_data: irq data containing irq number of gpio pin for the interrupt
+ * to enable
+ *
+ * Clears the INTSTS bit and unmasks the given interrrupt.
+ */
+static void zynq_gpio_irq_enable(struct irq_data *irq_data)
+{
+ /*
+ * The Zynq GPIO controller does not disable interrupt detection when
+ * the interrupt is masked and only disables the propagation of the
+ * interrupt. This means when the controller detects an interrupt
+ * condition while the interrupt is logically disabled it will propagate
+ * that interrupt event once the interrupt is enabled. This will cause
+ * the interrupt consumer to see spurious interrupts to prevent this
+ * first make sure that the interrupt is not asserted and then enable
+ * it.
+ */
+ zynq_gpio_irq_ack(irq_data);
+ zynq_gpio_irq_unmask(irq_data);
+}
+
+/**
+ * zynq_gpio_set_irq_type - Set the irq type for a gpio pin
+ * @irq_data: irq data containing irq number of gpio pin
+ * @type: interrupt type that is to be set for the gpio pin
+ *
+ * This function gets the gpio pin number and its bank from the gpio pin number
+ * and configures the INT_TYPE, INT_POLARITY and INT_ANY registers.
+ *
+ * Return: 0, negative error otherwise.
+ * TYPE-EDGE_RISING, INT_TYPE - 1, INT_POLARITY - 1, INT_ANY - 0;
+ * TYPE-EDGE_FALLING, INT_TYPE - 1, INT_POLARITY - 0, INT_ANY - 0;
+ * TYPE-EDGE_BOTH, INT_TYPE - 1, INT_POLARITY - NA, INT_ANY - 1;
+ * TYPE-LEVEL_HIGH, INT_TYPE - 0, INT_POLARITY - 1, INT_ANY - NA;
+ * TYPE-LEVEL_LOW, INT_TYPE - 0, INT_POLARITY - 0, INT_ANY - NA
+ */
+static int zynq_gpio_set_irq_type(struct irq_data *irq_data, unsigned int type)
+{
+ u32 int_type, int_pol, int_any;
+ unsigned int device_pin_num, bank_num, bank_pin_num;
+ struct zynq_gpio *gpio = irq_data_get_irq_chip_data(irq_data);
+
+ device_pin_num = irq_data->hwirq;
+ zynq_gpio_get_bank_pin(device_pin_num, &bank_num, &bank_pin_num);
+
+ int_type = readl_relaxed(gpio->base_addr +
+ ZYNQ_GPIO_INTTYPE_OFFSET(bank_num));
+ int_pol = readl_relaxed(gpio->base_addr +
+ ZYNQ_GPIO_INTPOL_OFFSET(bank_num));
+ int_any = readl_relaxed(gpio->base_addr +
+ ZYNQ_GPIO_INTANY_OFFSET(bank_num));
+
+ /*
+ * based on the type requested, configure the INT_TYPE, INT_POLARITY
+ * and INT_ANY registers
+ */
+ switch (type) {
+ case IRQ_TYPE_EDGE_RISING:
+ int_type |= BIT(bank_pin_num);
+ int_pol |= BIT(bank_pin_num);
+ int_any &= ~BIT(bank_pin_num);
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ int_type |= BIT(bank_pin_num);
+ int_pol &= ~BIT(bank_pin_num);
+ int_any &= ~BIT(bank_pin_num);
+ break;
+ case IRQ_TYPE_EDGE_BOTH:
+ int_type |= BIT(bank_pin_num);
+ int_any |= BIT(bank_pin_num);
+ break;
+ case IRQ_TYPE_LEVEL_HIGH:
+ int_type &= ~BIT(bank_pin_num);
+ int_pol |= BIT(bank_pin_num);
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ int_type &= ~BIT(bank_pin_num);
+ int_pol &= ~BIT(bank_pin_num);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ writel_relaxed(int_type,
+ gpio->base_addr + ZYNQ_GPIO_INTTYPE_OFFSET(bank_num));
+ writel_relaxed(int_pol,
+ gpio->base_addr + ZYNQ_GPIO_INTPOL_OFFSET(bank_num));
+ writel_relaxed(int_any,
+ gpio->base_addr + ZYNQ_GPIO_INTANY_OFFSET(bank_num));
+ return 0;
+}
+
+static int zynq_gpio_set_wake(struct irq_data *data, unsigned int on)
+{
+ if (on)
+ zynq_gpio_irq_unmask(data);
+ else
+ zynq_gpio_irq_mask(data);
+
+ return 0;
+}
+
+/* irq chip descriptor */
+static struct irq_chip zynq_gpio_irqchip = {
+ .name = DRIVER_NAME,
+ .irq_enable = zynq_gpio_irq_enable,
+ .irq_mask = zynq_gpio_irq_mask,
+ .irq_unmask = zynq_gpio_irq_unmask,
+ .irq_set_type = zynq_gpio_set_irq_type,
+ .irq_set_wake = zynq_gpio_set_wake,
+};
+
+/**
+ * zynq_gpio_irqhandler - IRQ handler for the gpio banks of a gpio device
+ * @irq: irq number of the gpio bank where interrupt has occurred
+ * @desc: irq descriptor instance of the 'irq'
+ *
+ * This function reads the Interrupt Status Register of each bank to get the
+ * gpio pin number which has triggered an interrupt. It then acks the triggered
+ * interrupt and calls the pin specific handler set by the higher layer
+ * application for that pin.
+ * Note: A bug is reported if no handler is set for the gpio pin.
+ */
+static void zynq_gpio_irqhandler(unsigned int irq, struct irq_desc *desc)
+{
+ u32 int_sts, int_enb;
+ unsigned int bank_num;
+ struct zynq_gpio *gpio = irq_get_handler_data(irq);
+ struct irq_chip *irqchip = irq_desc_get_chip(desc);
+
+ chained_irq_enter(irqchip, desc);
+
+ for (bank_num = 0; bank_num < ZYNQ_GPIO_MAX_BANK; bank_num++) {
+ int_sts = readl_relaxed(gpio->base_addr +
+ ZYNQ_GPIO_INTSTS_OFFSET(bank_num));
+ int_enb = readl_relaxed(gpio->base_addr +
+ ZYNQ_GPIO_INTMASK_OFFSET(bank_num));
+ int_sts &= ~int_enb;
+ if (int_sts) {
+ int offset;
+ unsigned long pending = int_sts;
+
+ for_each_set_bit(offset, &pending, 32) {
+ unsigned int gpio_irq =
+ irq_find_mapping(gpio->chip.irqdomain,
+ offset);
+ generic_handle_irq(gpio_irq);
+ }
+
+ /* clear IRQ in HW */
+ writel_relaxed(int_sts, gpio->base_addr +
+ ZYNQ_GPIO_INTSTS_OFFSET(bank_num));
+ }
+ }
+
+ chained_irq_exit(irqchip, desc);
+}
+
+static int __maybe_unused zynq_gpio_suspend(struct device *dev)
+{
+ if (!device_may_wakeup(dev))
+ return pm_runtime_force_suspend(dev);
+
+ return 0;
+}
+
+static int __maybe_unused zynq_gpio_resume(struct device *dev)
+{
+ if (!device_may_wakeup(dev))
+ return pm_runtime_force_resume(dev);
+
+ return 0;
+}
+
+static int __maybe_unused zynq_gpio_runtime_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct zynq_gpio *gpio = platform_get_drvdata(pdev);
+
+ clk_disable_unprepare(gpio->clk);
+
+ return 0;
+}
+
+static int __maybe_unused zynq_gpio_runtime_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct zynq_gpio *gpio = platform_get_drvdata(pdev);
+
+ return clk_prepare_enable(gpio->clk);
+}
+
+static int zynq_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+ int ret;
+
+ ret = pm_runtime_get_sync(chip->dev);
+
+ /*
+ * If the device is already active pm_runtime_get() will return 1 on
+ * success, but gpio_request still needs to return 0.
+ */
+ return ret < 0 ? ret : 0;
+}
+
+static void zynq_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+ pm_runtime_put(chip->dev);
+}
+
+static const struct dev_pm_ops zynq_gpio_dev_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(zynq_gpio_suspend, zynq_gpio_resume)
+ SET_PM_RUNTIME_PM_OPS(zynq_gpio_runtime_suspend,
+ zynq_gpio_runtime_resume, NULL)
+};
+
+/**
+ * zynq_gpio_probe - Initialization method for a zynq_gpio device
+ * @pdev: platform device instance
+ *
+ * This function allocates memory resources for the gpio device and registers
+ * all the banks of the device. It will also set up interrupts for the gpio
+ * pins.
+ * Note: Interrupts are disabled for all the banks during initialization.
+ *
+ * Return: 0 on success, negative error otherwise.
+ */
+static int zynq_gpio_probe(struct platform_device *pdev)
+{
+ int ret, bank_num, irq;
+ struct zynq_gpio *gpio;
+ struct gpio_chip *chip;
+ struct resource *res;
+
+ gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
+ if (!gpio)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, gpio);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ gpio->base_addr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(gpio->base_addr))
+ return PTR_ERR(gpio->base_addr);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "invalid IRQ\n");
+ return irq;
+ }
+
+ /* configure the gpio chip */
+ chip = &gpio->chip;
+ chip->label = "zynq_gpio";
+ chip->owner = THIS_MODULE;
+ chip->dev = &pdev->dev;
+ chip->get = zynq_gpio_get_value;
+ chip->set = zynq_gpio_set_value;
+ chip->request = zynq_gpio_request;
+ chip->free = zynq_gpio_free;
+ chip->direction_input = zynq_gpio_dir_in;
+ chip->direction_output = zynq_gpio_dir_out;
+ chip->base = -1;
+ chip->ngpio = ZYNQ_GPIO_NR_GPIOS;
+
+ /* Enable GPIO clock */
+ gpio->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(gpio->clk)) {
+ dev_err(&pdev->dev, "input clock not found.\n");
+ return PTR_ERR(gpio->clk);
+ }
+ ret = clk_prepare_enable(gpio->clk);
+ if (ret) {
+ dev_err(&pdev->dev, "Unable to enable clock.\n");
+ return ret;
+ }
+
+ /* report a bug if gpio chip registration fails */
+ ret = gpiochip_add(chip);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to add gpio chip\n");
+ goto err_disable_clk;
+ }
+
+ /* disable interrupts for all banks */
+ for (bank_num = 0; bank_num < ZYNQ_GPIO_MAX_BANK; bank_num++)
+ writel_relaxed(ZYNQ_GPIO_IXR_DISABLE_ALL, gpio->base_addr +
+ ZYNQ_GPIO_INTDIS_OFFSET(bank_num));
+
+ ret = gpiochip_irqchip_add(chip, &zynq_gpio_irqchip, 0,
+ handle_simple_irq, IRQ_TYPE_NONE);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to add irq chip\n");
+ goto err_rm_gpiochip;
+ }
+
+ gpiochip_set_chained_irqchip(chip, &zynq_gpio_irqchip, irq,
+ zynq_gpio_irqhandler);
+
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+
+ device_set_wakeup_capable(&pdev->dev, 1);
+
+ return 0;
+
+err_rm_gpiochip:
+ if (gpiochip_remove(chip))
+ dev_err(&pdev->dev, "Failed to remove gpio chip\n");
+err_disable_clk:
+ clk_disable_unprepare(gpio->clk);
+
+ return ret;
+}
+
+/**
+ * zynq_gpio_remove - Driver removal function
+ * @pdev: platform device instance
+ *
+ * Return: 0 always
+ */
+static int zynq_gpio_remove(struct platform_device *pdev)
+{
+ int ret;
+ struct zynq_gpio *gpio = platform_get_drvdata(pdev);
+
+ pm_runtime_get_sync(&pdev->dev);
+
+ ret = gpiochip_remove(&gpio->chip);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to remove gpio chip\n");
+ return ret;
+ }
+ clk_disable_unprepare(gpio->clk);
+ device_set_wakeup_capable(&pdev->dev, 0);
+ return 0;
+}
+
+static struct of_device_id zynq_gpio_of_match[] = {
+ { .compatible = "xlnx,zynq-gpio-1.0", },
+ { /* end of table */ }
+};
+MODULE_DEVICE_TABLE(of, zynq_gpio_of_match);
+
+static struct platform_driver zynq_gpio_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ .pm = &zynq_gpio_dev_pm_ops,
+ .of_match_table = zynq_gpio_of_match,
+ },
+ .probe = zynq_gpio_probe,
+ .remove = zynq_gpio_remove,
+};
+
+/**
+ * zynq_gpio_init - Initial driver registration call
+ *
+ * Return: value from platform_driver_register
+ */
+static int __init zynq_gpio_init(void)
+{
+ return platform_driver_register(&zynq_gpio_driver);
+}
+postcore_initcall(zynq_gpio_init);
+
+MODULE_AUTHOR("Xilinx Inc.");
+MODULE_DESCRIPTION("Zynq GPIO driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index 4a987917c186..d62eaaa75397 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -157,7 +157,7 @@ static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares,
gpiod_direction_input(desc);
- ret = gpiod_lock_as_irq(desc);
+ ret = gpio_lock_as_irq(chip, pin);
if (ret) {
dev_err(chip->dev, "Failed to lock GPIO as interrupt\n");
goto fail_free_desc;
@@ -212,7 +212,7 @@ static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares,
fail_free_event:
kfree(event);
fail_unlock_irq:
- gpiod_unlock_as_irq(desc);
+ gpio_unlock_as_irq(chip, pin);
fail_free_desc:
gpiochip_free_own_desc(desc);
@@ -221,7 +221,7 @@ fail_free_desc:
/**
* acpi_gpiochip_request_interrupts() - Register isr for gpio chip ACPI events
- * @acpi_gpio: ACPI GPIO chip
+ * @chip: GPIO chip
*
* ACPI5 platforms can use GPIO signaled ACPI events. These GPIO interrupts are
* handled by ACPI event methods which need to be called from the GPIO
@@ -229,11 +229,21 @@ fail_free_desc:
* gpio pins have acpi event methods and assigns interrupt handlers that calls
* the acpi event methods for those pins.
*/
-static void acpi_gpiochip_request_interrupts(struct acpi_gpio_chip *acpi_gpio)
+void acpi_gpiochip_request_interrupts(struct gpio_chip *chip)
{
- struct gpio_chip *chip = acpi_gpio->chip;
+ struct acpi_gpio_chip *acpi_gpio;
+ acpi_handle handle;
+ acpi_status status;
+
+ if (!chip->dev || !chip->to_irq)
+ return;
- if (!chip->to_irq)
+ handle = ACPI_HANDLE(chip->dev);
+ if (!handle)
+ return;
+
+ status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio);
+ if (ACPI_FAILURE(status))
return;
INIT_LIST_HEAD(&acpi_gpio->events);
@@ -243,17 +253,27 @@ static void acpi_gpiochip_request_interrupts(struct acpi_gpio_chip *acpi_gpio)
/**
* acpi_gpiochip_free_interrupts() - Free GPIO ACPI event interrupts.
- * @acpi_gpio: ACPI GPIO chip
+ * @chip: GPIO chip
*
* Free interrupts associated with GPIO ACPI event method for the given
* GPIO chip.
*/
-static void acpi_gpiochip_free_interrupts(struct acpi_gpio_chip *acpi_gpio)
+void acpi_gpiochip_free_interrupts(struct gpio_chip *chip)
{
+ struct acpi_gpio_chip *acpi_gpio;
struct acpi_gpio_event *event, *ep;
- struct gpio_chip *chip = acpi_gpio->chip;
+ acpi_handle handle;
+ acpi_status status;
+
+ if (!chip->dev || !chip->to_irq)
+ return;
- if (!chip->to_irq)
+ handle = ACPI_HANDLE(chip->dev);
+ if (!handle)
+ return;
+
+ status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio);
+ if (ACPI_FAILURE(status))
return;
list_for_each_entry_safe_reverse(event, ep, &acpi_gpio->events, node) {
@@ -263,7 +283,7 @@ static void acpi_gpiochip_free_interrupts(struct acpi_gpio_chip *acpi_gpio)
desc = gpiochip_get_desc(chip, event->pin);
if (WARN_ON(IS_ERR(desc)))
continue;
- gpiod_unlock_as_irq(desc);
+ gpio_unlock_as_irq(chip, event->pin);
gpiochip_free_own_desc(desc);
list_del(&event->node);
kfree(event);
@@ -525,7 +545,6 @@ void acpi_gpiochip_add(struct gpio_chip *chip)
return;
}
- acpi_gpiochip_request_interrupts(acpi_gpio);
acpi_gpiochip_request_regions(acpi_gpio);
}
@@ -549,7 +568,6 @@ void acpi_gpiochip_remove(struct gpio_chip *chip)
}
acpi_gpiochip_free_regions(acpi_gpio);
- acpi_gpiochip_free_interrupts(acpi_gpio);
acpi_detach_data(handle, acpi_gpio_chip_dh);
kfree(acpi_gpio);
diff --git a/drivers/gpio/gpiolib-legacy.c b/drivers/gpio/gpiolib-legacy.c
new file mode 100644
index 000000000000..078ae6c2df79
--- /dev/null
+++ b/drivers/gpio/gpiolib-legacy.c
@@ -0,0 +1,102 @@
+#include <linux/gpio/consumer.h>
+#include <linux/gpio/driver.h>
+
+#include <linux/gpio.h>
+
+#include "gpiolib.h"
+
+void gpio_free(unsigned gpio)
+{
+ gpiod_free(gpio_to_desc(gpio));
+}
+EXPORT_SYMBOL_GPL(gpio_free);
+
+/**
+ * gpio_request_one - request a single GPIO with initial configuration
+ * @gpio: the GPIO number
+ * @flags: GPIO configuration as specified by GPIOF_*
+ * @label: a literal description string of this GPIO
+ */
+int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
+{
+ struct gpio_desc *desc;
+ int err;
+
+ desc = gpio_to_desc(gpio);
+
+ err = gpiod_request(desc, label);
+ if (err)
+ return err;
+
+ if (flags & GPIOF_OPEN_DRAIN)
+ set_bit(FLAG_OPEN_DRAIN, &desc->flags);
+
+ if (flags & GPIOF_OPEN_SOURCE)
+ set_bit(FLAG_OPEN_SOURCE, &desc->flags);
+
+ if (flags & GPIOF_ACTIVE_LOW)
+ set_bit(FLAG_ACTIVE_LOW, &desc->flags);
+
+ if (flags & GPIOF_DIR_IN)
+ err = gpiod_direction_input(desc);
+ else
+ err = gpiod_direction_output_raw(desc,
+ (flags & GPIOF_INIT_HIGH) ? 1 : 0);
+
+ if (err)
+ goto free_gpio;
+
+ if (flags & GPIOF_EXPORT) {
+ err = gpiod_export(desc, flags & GPIOF_EXPORT_CHANGEABLE);
+ if (err)
+ goto free_gpio;
+ }
+
+ return 0;
+
+ free_gpio:
+ gpiod_free(desc);
+ return err;
+}
+EXPORT_SYMBOL_GPL(gpio_request_one);
+
+int gpio_request(unsigned gpio, const char *label)
+{
+ return gpiod_request(gpio_to_desc(gpio), label);
+}
+EXPORT_SYMBOL_GPL(gpio_request);
+
+/**
+ * gpio_request_array - request multiple GPIOs in a single call
+ * @array: array of the 'struct gpio'
+ * @num: how many GPIOs in the array
+ */
+int gpio_request_array(const struct gpio *array, size_t num)
+{
+ int i, err;
+
+ for (i = 0; i < num; i++, array++) {
+ err = gpio_request_one(array->gpio, array->flags, array->label);
+ if (err)
+ goto err_free;
+ }
+ return 0;
+
+err_free:
+ while (i--)
+ gpio_free((--array)->gpio);
+ return err;
+}
+EXPORT_SYMBOL_GPL(gpio_request_array);
+
+/**
+ * gpio_free_array - release multiple GPIOs in a single call
+ * @array: array of the 'struct gpio'
+ * @num: how many GPIOs in the array
+ */
+void gpio_free_array(const struct gpio *array, size_t num)
+{
+ while (num--)
+ gpio_free((array++)->gpio);
+}
+EXPORT_SYMBOL_GPL(gpio_free_array);
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index af7e25c9a9ae..7cfdc2278905 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -23,7 +23,7 @@
#include <linux/pinctrl/pinctrl.h>
#include <linux/slab.h>
-struct gpio_desc;
+#include "gpiolib.h"
/* Private data structure for of_gpiochip_find_and_xlate */
struct gg_data {
@@ -82,19 +82,19 @@ struct gpio_desc *of_get_named_gpiod_flags(struct device_node *np,
ret = of_parse_phandle_with_args(np, propname, "#gpio-cells", index,
&gg_data.gpiospec);
if (ret) {
- pr_debug("%s: can't parse gpios property of node '%s[%d]'\n",
- __func__, np->full_name, index);
+ pr_debug("%s: can't parse '%s' property of node '%s[%d]'\n",
+ __func__, propname, np->full_name, index);
return ERR_PTR(ret);
}
gpiochip_find(&gg_data, of_gpiochip_find_and_xlate);
of_node_put(gg_data.gpiospec.np);
- pr_debug("%s exited with status %d\n", __func__,
+ pr_debug("%s: parsed '%s' property of node '%s[%d]' - status (%d)\n",
+ __func__, propname, np->full_name, index,
PTR_ERR_OR_ZERO(gg_data.out_gpio));
return gg_data.out_gpio;
}
-EXPORT_SYMBOL(of_get_named_gpiod_flags);
int of_get_named_gpio_flags(struct device_node *np, const char *list_name,
int index, enum of_gpio_flags *flags)
diff --git a/drivers/gpio/gpiolib-sysfs.c b/drivers/gpio/gpiolib-sysfs.c
new file mode 100644
index 000000000000..5f2150b619a7
--- /dev/null
+++ b/drivers/gpio/gpiolib-sysfs.c
@@ -0,0 +1,827 @@
+#include <linux/idr.h>
+#include <linux/mutex.h>
+#include <linux/device.h>
+#include <linux/sysfs.h>
+#include <linux/gpio/consumer.h>
+#include <linux/gpio/driver.h>
+#include <linux/interrupt.h>
+#include <linux/kdev_t.h>
+
+#include "gpiolib.h"
+
+static DEFINE_IDR(dirent_idr);
+
+
+/* lock protects against unexport_gpio() being called while
+ * sysfs files are active.
+ */
+static DEFINE_MUTEX(sysfs_lock);
+
+/*
+ * /sys/class/gpio/gpioN... only for GPIOs that are exported
+ * /direction
+ * * MAY BE OMITTED if kernel won't allow direction changes
+ * * is read/write as "in" or "out"
+ * * may also be written as "high" or "low", initializing
+ * output value as specified ("out" implies "low")
+ * /value
+ * * always readable, subject to hardware behavior
+ * * may be writable, as zero/nonzero
+ * /edge
+ * * configures behavior of poll(2) on /value
+ * * available only if pin can generate IRQs on input
+ * * is read/write as "none", "falling", "rising", or "both"
+ * /active_low
+ * * configures polarity of /value
+ * * is read/write as zero/nonzero
+ * * also affects existing and subsequent "falling" and "rising"
+ * /edge configuration
+ */
+
+static ssize_t gpio_direction_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const struct gpio_desc *desc = dev_get_drvdata(dev);
+ ssize_t status;
+
+ mutex_lock(&sysfs_lock);
+
+ if (!test_bit(FLAG_EXPORT, &desc->flags)) {
+ status = -EIO;
+ } else {
+ gpiod_get_direction(desc);
+ status = sprintf(buf, "%s\n",
+ test_bit(FLAG_IS_OUT, &desc->flags)
+ ? "out" : "in");
+ }
+
+ mutex_unlock(&sysfs_lock);
+ return status;
+}
+
+static ssize_t gpio_direction_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct gpio_desc *desc = dev_get_drvdata(dev);
+ ssize_t status;
+
+ mutex_lock(&sysfs_lock);
+
+ if (!test_bit(FLAG_EXPORT, &desc->flags))
+ status = -EIO;
+ else if (sysfs_streq(buf, "high"))
+ status = gpiod_direction_output_raw(desc, 1);
+ else if (sysfs_streq(buf, "out") || sysfs_streq(buf, "low"))
+ status = gpiod_direction_output_raw(desc, 0);
+ else if (sysfs_streq(buf, "in"))
+ status = gpiod_direction_input(desc);
+ else
+ status = -EINVAL;
+
+ mutex_unlock(&sysfs_lock);
+ return status ? : size;
+}
+
+static /* const */ DEVICE_ATTR(direction, 0644,
+ gpio_direction_show, gpio_direction_store);
+
+static ssize_t gpio_value_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct gpio_desc *desc = dev_get_drvdata(dev);
+ ssize_t status;
+
+ mutex_lock(&sysfs_lock);
+
+ if (!test_bit(FLAG_EXPORT, &desc->flags))
+ status = -EIO;
+ else
+ status = sprintf(buf, "%d\n", gpiod_get_value_cansleep(desc));
+
+ mutex_unlock(&sysfs_lock);
+ return status;
+}
+
+static ssize_t gpio_value_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct gpio_desc *desc = dev_get_drvdata(dev);
+ ssize_t status;
+
+ mutex_lock(&sysfs_lock);
+
+ if (!test_bit(FLAG_EXPORT, &desc->flags))
+ status = -EIO;
+ else if (!test_bit(FLAG_IS_OUT, &desc->flags))
+ status = -EPERM;
+ else {
+ long value;
+
+ status = kstrtol(buf, 0, &value);
+ if (status == 0) {
+ gpiod_set_value_cansleep(desc, value);
+ status = size;
+ }
+ }
+
+ mutex_unlock(&sysfs_lock);
+ return status;
+}
+
+static const DEVICE_ATTR(value, 0644,
+ gpio_value_show, gpio_value_store);
+
+static irqreturn_t gpio_sysfs_irq(int irq, void *priv)
+{
+ struct kernfs_node *value_sd = priv;
+
+ sysfs_notify_dirent(value_sd);
+ return IRQ_HANDLED;
+}
+
+static int gpio_setup_irq(struct gpio_desc *desc, struct device *dev,
+ unsigned long gpio_flags)
+{
+ struct kernfs_node *value_sd;
+ unsigned long irq_flags;
+ int ret, irq, id;
+
+ if ((desc->flags & GPIO_TRIGGER_MASK) == gpio_flags)
+ return 0;
+
+ irq = gpiod_to_irq(desc);
+ if (irq < 0)
+ return -EIO;
+
+ id = desc->flags >> ID_SHIFT;
+ value_sd = idr_find(&dirent_idr, id);
+ if (value_sd)
+ free_irq(irq, value_sd);
+
+ desc->flags &= ~GPIO_TRIGGER_MASK;
+
+ if (!gpio_flags) {
+ gpio_unlock_as_irq(desc->chip, gpio_chip_hwgpio(desc));
+ ret = 0;
+ goto free_id;
+ }
+
+ irq_flags = IRQF_SHARED;
+ if (test_bit(FLAG_TRIG_FALL, &gpio_flags))
+ irq_flags |= test_bit(FLAG_ACTIVE_LOW, &desc->flags) ?
+ IRQF_TRIGGER_RISING : IRQF_TRIGGER_FALLING;
+ if (test_bit(FLAG_TRIG_RISE, &gpio_flags))
+ irq_flags |= test_bit(FLAG_ACTIVE_LOW, &desc->flags) ?
+ IRQF_TRIGGER_FALLING : IRQF_TRIGGER_RISING;
+
+ if (!value_sd) {
+ value_sd = sysfs_get_dirent(dev->kobj.sd, "value");
+ if (!value_sd) {
+ ret = -ENODEV;
+ goto err_out;
+ }
+
+ ret = idr_alloc(&dirent_idr, value_sd, 1, 0, GFP_KERNEL);
+ if (ret < 0)
+ goto free_sd;
+ id = ret;
+
+ desc->flags &= GPIO_FLAGS_MASK;
+ desc->flags |= (unsigned long)id << ID_SHIFT;
+
+ if (desc->flags >> ID_SHIFT != id) {
+ ret = -ERANGE;
+ goto free_id;
+ }
+ }
+
+ ret = request_any_context_irq(irq, gpio_sysfs_irq, irq_flags,
+ "gpiolib", value_sd);
+ if (ret < 0)
+ goto free_id;
+
+ ret = gpio_lock_as_irq(desc->chip, gpio_chip_hwgpio(desc));
+ if (ret < 0) {
+ gpiod_warn(desc, "failed to flag the GPIO for IRQ\n");
+ goto free_id;
+ }
+
+ desc->flags |= gpio_flags;
+ return 0;
+
+free_id:
+ idr_remove(&dirent_idr, id);
+ desc->flags &= GPIO_FLAGS_MASK;
+free_sd:
+ if (value_sd)
+ sysfs_put(value_sd);
+err_out:
+ return ret;
+}
+
+static const struct {
+ const char *name;
+ unsigned long flags;
+} trigger_types[] = {
+ { "none", 0 },
+ { "falling", BIT(FLAG_TRIG_FALL) },
+ { "rising", BIT(FLAG_TRIG_RISE) },
+ { "both", BIT(FLAG_TRIG_FALL) | BIT(FLAG_TRIG_RISE) },
+};
+
+static ssize_t gpio_edge_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const struct gpio_desc *desc = dev_get_drvdata(dev);
+ ssize_t status;
+
+ mutex_lock(&sysfs_lock);
+
+ if (!test_bit(FLAG_EXPORT, &desc->flags))
+ status = -EIO;
+ else {
+ int i;
+
+ status = 0;
+ for (i = 0; i < ARRAY_SIZE(trigger_types); i++)
+ if ((desc->flags & GPIO_TRIGGER_MASK)
+ == trigger_types[i].flags) {
+ status = sprintf(buf, "%s\n",
+ trigger_types[i].name);
+ break;
+ }
+ }
+
+ mutex_unlock(&sysfs_lock);
+ return status;
+}
+
+static ssize_t gpio_edge_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct gpio_desc *desc = dev_get_drvdata(dev);
+ ssize_t status;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(trigger_types); i++)
+ if (sysfs_streq(trigger_types[i].name, buf))
+ goto found;
+ return -EINVAL;
+
+found:
+ mutex_lock(&sysfs_lock);
+
+ if (!test_bit(FLAG_EXPORT, &desc->flags))
+ status = -EIO;
+ else {
+ status = gpio_setup_irq(desc, dev, trigger_types[i].flags);
+ if (!status)
+ status = size;
+ }
+
+ mutex_unlock(&sysfs_lock);
+
+ return status;
+}
+
+static DEVICE_ATTR(edge, 0644, gpio_edge_show, gpio_edge_store);
+
+static int sysfs_set_active_low(struct gpio_desc *desc, struct device *dev,
+ int value)
+{
+ int status = 0;
+
+ if (!!test_bit(FLAG_ACTIVE_LOW, &desc->flags) == !!value)
+ return 0;
+
+ if (value)
+ set_bit(FLAG_ACTIVE_LOW, &desc->flags);
+ else
+ clear_bit(FLAG_ACTIVE_LOW, &desc->flags);
+
+ /* reconfigure poll(2) support if enabled on one edge only */
+ if (dev != NULL && (!!test_bit(FLAG_TRIG_RISE, &desc->flags) ^
+ !!test_bit(FLAG_TRIG_FALL, &desc->flags))) {
+ unsigned long trigger_flags = desc->flags & GPIO_TRIGGER_MASK;
+
+ gpio_setup_irq(desc, dev, 0);
+ status = gpio_setup_irq(desc, dev, trigger_flags);
+ }
+
+ return status;
+}
+
+static ssize_t gpio_active_low_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const struct gpio_desc *desc = dev_get_drvdata(dev);
+ ssize_t status;
+
+ mutex_lock(&sysfs_lock);
+
+ if (!test_bit(FLAG_EXPORT, &desc->flags))
+ status = -EIO;
+ else
+ status = sprintf(buf, "%d\n",
+ !!test_bit(FLAG_ACTIVE_LOW, &desc->flags));
+
+ mutex_unlock(&sysfs_lock);
+
+ return status;
+}
+
+static ssize_t gpio_active_low_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct gpio_desc *desc = dev_get_drvdata(dev);
+ ssize_t status;
+
+ mutex_lock(&sysfs_lock);
+
+ if (!test_bit(FLAG_EXPORT, &desc->flags)) {
+ status = -EIO;
+ } else {
+ long value;
+
+ status = kstrtol(buf, 0, &value);
+ if (status == 0)
+ status = sysfs_set_active_low(desc, dev, value != 0);
+ }
+
+ mutex_unlock(&sysfs_lock);
+
+ return status ? : size;
+}
+
+static const DEVICE_ATTR(active_low, 0644,
+ gpio_active_low_show, gpio_active_low_store);
+
+static const struct attribute *gpio_attrs[] = {
+ &dev_attr_value.attr,
+ &dev_attr_active_low.attr,
+ NULL,
+};
+
+static const struct attribute_group gpio_attr_group = {
+ .attrs = (struct attribute **) gpio_attrs,
+};
+
+/*
+ * /sys/class/gpio/gpiochipN/
+ * /base ... matching gpio_chip.base (N)
+ * /label ... matching gpio_chip.label
+ * /ngpio ... matching gpio_chip.ngpio
+ */
+
+static ssize_t chip_base_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const struct gpio_chip *chip = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%d\n", chip->base);
+}
+static DEVICE_ATTR(base, 0444, chip_base_show, NULL);
+
+static ssize_t chip_label_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const struct gpio_chip *chip = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%s\n", chip->label ? : "");
+}
+static DEVICE_ATTR(label, 0444, chip_label_show, NULL);
+
+static ssize_t chip_ngpio_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const struct gpio_chip *chip = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", chip->ngpio);
+}
+static DEVICE_ATTR(ngpio, 0444, chip_ngpio_show, NULL);
+
+static const struct attribute *gpiochip_attrs[] = {
+ &dev_attr_base.attr,
+ &dev_attr_label.attr,
+ &dev_attr_ngpio.attr,
+ NULL,
+};
+
+static const struct attribute_group gpiochip_attr_group = {
+ .attrs = (struct attribute **) gpiochip_attrs,
+};
+
+/*
+ * /sys/class/gpio/export ... write-only
+ * integer N ... number of GPIO to export (full access)
+ * /sys/class/gpio/unexport ... write-only
+ * integer N ... number of GPIO to unexport
+ */
+static ssize_t export_store(struct class *class,
+ struct class_attribute *attr,
+ const char *buf, size_t len)
+{
+ long gpio;
+ struct gpio_desc *desc;
+ int status;
+
+ status = kstrtol(buf, 0, &gpio);
+ if (status < 0)
+ goto done;
+
+ desc = gpio_to_desc(gpio);
+ /* reject invalid GPIOs */
+ if (!desc) {
+ pr_warn("%s: invalid GPIO %ld\n", __func__, gpio);
+ return -EINVAL;
+ }
+
+ /* No extra locking here; FLAG_SYSFS just signifies that the
+ * request and export were done by on behalf of userspace, so
+ * they may be undone on its behalf too.
+ */
+
+ status = gpiod_request(desc, "sysfs");
+ if (status < 0) {
+ if (status == -EPROBE_DEFER)
+ status = -ENODEV;
+ goto done;
+ }
+ status = gpiod_export(desc, true);
+ if (status < 0)
+ gpiod_free(desc);
+ else
+ set_bit(FLAG_SYSFS, &desc->flags);
+
+done:
+ if (status)
+ pr_debug("%s: status %d\n", __func__, status);
+ return status ? : len;
+}
+
+static ssize_t unexport_store(struct class *class,
+ struct class_attribute *attr,
+ const char *buf, size_t len)
+{
+ long gpio;
+ struct gpio_desc *desc;
+ int status;
+
+ status = kstrtol(buf, 0, &gpio);
+ if (status < 0)
+ goto done;
+
+ desc = gpio_to_desc(gpio);
+ /* reject bogus commands (gpio_unexport ignores them) */
+ if (!desc) {
+ pr_warn("%s: invalid GPIO %ld\n", __func__, gpio);
+ return -EINVAL;
+ }
+
+ status = -EINVAL;
+
+ /* No extra locking here; FLAG_SYSFS just signifies that the
+ * request and export were done by on behalf of userspace, so
+ * they may be undone on its behalf too.
+ */
+ if (test_and_clear_bit(FLAG_SYSFS, &desc->flags)) {
+ status = 0;
+ gpiod_free(desc);
+ }
+done:
+ if (status)
+ pr_debug("%s: status %d\n", __func__, status);
+ return status ? : len;
+}
+
+static struct class_attribute gpio_class_attrs[] = {
+ __ATTR(export, 0200, NULL, export_store),
+ __ATTR(unexport, 0200, NULL, unexport_store),
+ __ATTR_NULL,
+};
+
+static struct class gpio_class = {
+ .name = "gpio",
+ .owner = THIS_MODULE,
+
+ .class_attrs = gpio_class_attrs,
+};
+
+
+/**
+ * gpiod_export - export a GPIO through sysfs
+ * @gpio: gpio to make available, already requested
+ * @direction_may_change: true if userspace may change gpio direction
+ * Context: arch_initcall or later
+ *
+ * When drivers want to make a GPIO accessible to userspace after they
+ * have requested it -- perhaps while debugging, or as part of their
+ * public interface -- they may use this routine. If the GPIO can
+ * change direction (some can't) and the caller allows it, userspace
+ * will see "direction" sysfs attribute which may be used to change
+ * the gpio's direction. A "value" attribute will always be provided.
+ *
+ * Returns zero on success, else an error.
+ */
+int gpiod_export(struct gpio_desc *desc, bool direction_may_change)
+{
+ unsigned long flags;
+ int status;
+ const char *ioname = NULL;
+ struct device *dev;
+ int offset;
+
+ /* can't export until sysfs is available ... */
+ if (!gpio_class.p) {
+ pr_debug("%s: called too early!\n", __func__);
+ return -ENOENT;
+ }
+
+ if (!desc) {
+ pr_debug("%s: invalid gpio descriptor\n", __func__);
+ return -EINVAL;
+ }
+
+ mutex_lock(&sysfs_lock);
+
+ spin_lock_irqsave(&gpio_lock, flags);
+ if (!test_bit(FLAG_REQUESTED, &desc->flags) ||
+ test_bit(FLAG_EXPORT, &desc->flags)) {
+ spin_unlock_irqrestore(&gpio_lock, flags);
+ gpiod_dbg(desc, "%s: unavailable (requested=%d, exported=%d)\n",
+ __func__,
+ test_bit(FLAG_REQUESTED, &desc->flags),
+ test_bit(FLAG_EXPORT, &desc->flags));
+ status = -EPERM;
+ goto fail_unlock;
+ }
+
+ if (!desc->chip->direction_input || !desc->chip->direction_output)
+ direction_may_change = false;
+ spin_unlock_irqrestore(&gpio_lock, flags);
+
+ offset = gpio_chip_hwgpio(desc);
+ if (desc->chip->names && desc->chip->names[offset])
+ ioname = desc->chip->names[offset];
+
+ dev = device_create(&gpio_class, desc->chip->dev, MKDEV(0, 0),
+ desc, ioname ? ioname : "gpio%u",
+ desc_to_gpio(desc));
+ if (IS_ERR(dev)) {
+ status = PTR_ERR(dev);
+ goto fail_unlock;
+ }
+
+ status = sysfs_create_group(&dev->kobj, &gpio_attr_group);
+ if (status)
+ goto fail_unregister_device;
+
+ if (direction_may_change) {
+ status = device_create_file(dev, &dev_attr_direction);
+ if (status)
+ goto fail_unregister_device;
+ }
+
+ if (gpiod_to_irq(desc) >= 0 && (direction_may_change ||
+ !test_bit(FLAG_IS_OUT, &desc->flags))) {
+ status = device_create_file(dev, &dev_attr_edge);
+ if (status)
+ goto fail_unregister_device;
+ }
+
+ set_bit(FLAG_EXPORT, &desc->flags);
+ mutex_unlock(&sysfs_lock);
+ return 0;
+
+fail_unregister_device:
+ device_unregister(dev);
+fail_unlock:
+ mutex_unlock(&sysfs_lock);
+ gpiod_dbg(desc, "%s: status %d\n", __func__, status);
+ return status;
+}
+EXPORT_SYMBOL_GPL(gpiod_export);
+
+static int match_export(struct device *dev, const void *data)
+{
+ return dev_get_drvdata(dev) == data;
+}
+
+/**
+ * gpiod_export_link - create a sysfs link to an exported GPIO node
+ * @dev: device under which to create symlink
+ * @name: name of the symlink
+ * @gpio: gpio to create symlink to, already exported
+ *
+ * Set up a symlink from /sys/.../dev/name to /sys/class/gpio/gpioN
+ * node. Caller is responsible for unlinking.
+ *
+ * Returns zero on success, else an error.
+ */
+int gpiod_export_link(struct device *dev, const char *name,
+ struct gpio_desc *desc)
+{
+ int status = -EINVAL;
+
+ if (!desc) {
+ pr_warn("%s: invalid GPIO\n", __func__);
+ return -EINVAL;
+ }
+
+ mutex_lock(&sysfs_lock);
+
+ if (test_bit(FLAG_EXPORT, &desc->flags)) {
+ struct device *tdev;
+
+ tdev = class_find_device(&gpio_class, NULL, desc, match_export);
+ if (tdev != NULL) {
+ status = sysfs_create_link(&dev->kobj, &tdev->kobj,
+ name);
+ } else {
+ status = -ENODEV;
+ }
+ }
+
+ mutex_unlock(&sysfs_lock);
+
+ if (status)
+ gpiod_dbg(desc, "%s: status %d\n", __func__, status);
+
+ return status;
+}
+EXPORT_SYMBOL_GPL(gpiod_export_link);
+
+/**
+ * gpiod_sysfs_set_active_low - set the polarity of gpio sysfs value
+ * @gpio: gpio to change
+ * @value: non-zero to use active low, i.e. inverted values
+ *
+ * Set the polarity of /sys/class/gpio/gpioN/value sysfs attribute.
+ * The GPIO does not have to be exported yet. If poll(2) support has
+ * been enabled for either rising or falling edge, it will be
+ * reconfigured to follow the new polarity.
+ *
+ * Returns zero on success, else an error.
+ */
+int gpiod_sysfs_set_active_low(struct gpio_desc *desc, int value)
+{
+ struct device *dev = NULL;
+ int status = -EINVAL;
+
+ if (!desc) {
+ pr_warn("%s: invalid GPIO\n", __func__);
+ return -EINVAL;
+ }
+
+ mutex_lock(&sysfs_lock);
+
+ if (test_bit(FLAG_EXPORT, &desc->flags)) {
+ dev = class_find_device(&gpio_class, NULL, desc, match_export);
+ if (dev == NULL) {
+ status = -ENODEV;
+ goto unlock;
+ }
+ }
+
+ status = sysfs_set_active_low(desc, dev, value);
+
+unlock:
+ mutex_unlock(&sysfs_lock);
+
+ if (status)
+ gpiod_dbg(desc, "%s: status %d\n", __func__, status);
+
+ return status;
+}
+EXPORT_SYMBOL_GPL(gpiod_sysfs_set_active_low);
+
+/**
+ * gpiod_unexport - reverse effect of gpio_export()
+ * @gpio: gpio to make unavailable
+ *
+ * This is implicit on gpio_free().
+ */
+void gpiod_unexport(struct gpio_desc *desc)
+{
+ int status = 0;
+ struct device *dev = NULL;
+
+ if (!desc) {
+ pr_warn("%s: invalid GPIO\n", __func__);
+ return;
+ }
+
+ mutex_lock(&sysfs_lock);
+
+ if (test_bit(FLAG_EXPORT, &desc->flags)) {
+
+ dev = class_find_device(&gpio_class, NULL, desc, match_export);
+ if (dev) {
+ gpio_setup_irq(desc, dev, 0);
+ clear_bit(FLAG_EXPORT, &desc->flags);
+ } else
+ status = -ENODEV;
+ }
+
+ mutex_unlock(&sysfs_lock);
+
+ if (dev) {
+ device_unregister(dev);
+ put_device(dev);
+ }
+
+ if (status)
+ gpiod_dbg(desc, "%s: status %d\n", __func__, status);
+}
+EXPORT_SYMBOL_GPL(gpiod_unexport);
+
+int gpiochip_export(struct gpio_chip *chip)
+{
+ int status;
+ struct device *dev;
+
+ /* Many systems register gpio chips for SOC support very early,
+ * before driver model support is available. In those cases we
+ * export this later, in gpiolib_sysfs_init() ... here we just
+ * verify that _some_ field of gpio_class got initialized.
+ */
+ if (!gpio_class.p)
+ return 0;
+
+ /* use chip->base for the ID; it's already known to be unique */
+ mutex_lock(&sysfs_lock);
+ dev = device_create(&gpio_class, chip->dev, MKDEV(0, 0), chip,
+ "gpiochip%d", chip->base);
+ if (!IS_ERR(dev)) {
+ status = sysfs_create_group(&dev->kobj,
+ &gpiochip_attr_group);
+ } else
+ status = PTR_ERR(dev);
+ chip->exported = (status == 0);
+ mutex_unlock(&sysfs_lock);
+
+ if (status)
+ chip_dbg(chip, "%s: status %d\n", __func__, status);
+
+ return status;
+}
+
+void gpiochip_unexport(struct gpio_chip *chip)
+{
+ int status;
+ struct device *dev;
+
+ mutex_lock(&sysfs_lock);
+ dev = class_find_device(&gpio_class, NULL, chip, match_export);
+ if (dev) {
+ put_device(dev);
+ device_unregister(dev);
+ chip->exported = false;
+ status = 0;
+ } else
+ status = -ENODEV;
+ mutex_unlock(&sysfs_lock);
+
+ if (status)
+ chip_dbg(chip, "%s: status %d\n", __func__, status);
+}
+
+static int __init gpiolib_sysfs_init(void)
+{
+ int status;
+ unsigned long flags;
+ struct gpio_chip *chip;
+
+ status = class_register(&gpio_class);
+ if (status < 0)
+ return status;
+
+ /* Scan and register the gpio_chips which registered very
+ * early (e.g. before the class_register above was called).
+ *
+ * We run before arch_initcall() so chip->dev nodes can have
+ * registered, and so arch_initcall() can always gpio_export().
+ */
+ spin_lock_irqsave(&gpio_lock, flags);
+ list_for_each_entry(chip, &gpio_chips, list) {
+ if (chip->exported)
+ continue;
+
+ /*
+ * TODO we yield gpio_lock here because gpiochip_export()
+ * acquires a mutex. This is unsafe and needs to be fixed.
+ *
+ * Also it would be nice to use gpiochip_find() here so we
+ * can keep gpio_chips local to gpiolib.c, but the yield of
+ * gpio_lock prevents us from doing this.
+ */
+ spin_unlock_irqrestore(&gpio_lock, flags);
+ status = gpiochip_export(chip);
+ spin_lock_irqsave(&gpio_lock, flags);
+ }
+ spin_unlock_irqrestore(&gpio_lock, flags);
+
+
+ return status;
+}
+postcore_initcall(gpiolib_sysfs_init);
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 2ebc9071e354..15cc0bb65dda 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -14,6 +14,7 @@
#include <linux/slab.h>
#include <linux/acpi.h>
#include <linux/gpio/driver.h>
+#include <linux/gpio/machine.h>
#include "gpiolib.h"
@@ -44,111 +45,19 @@
* While any GPIO is requested, its gpio_chip is not removable;
* each GPIO's "requested" flag serves as a lock and refcount.
*/
-static DEFINE_SPINLOCK(gpio_lock);
+DEFINE_SPINLOCK(gpio_lock);
-struct gpio_desc {
- struct gpio_chip *chip;
- unsigned long flags;
-/* flag symbols are bit numbers */
-#define FLAG_REQUESTED 0
-#define FLAG_IS_OUT 1
-#define FLAG_EXPORT 2 /* protected by sysfs_lock */
-#define FLAG_SYSFS 3 /* exported via /sys/class/gpio/control */
-#define FLAG_TRIG_FALL 4 /* trigger on falling edge */
-#define FLAG_TRIG_RISE 5 /* trigger on rising edge */
-#define FLAG_ACTIVE_LOW 6 /* value has active low */
-#define FLAG_OPEN_DRAIN 7 /* Gpio is open drain type */
-#define FLAG_OPEN_SOURCE 8 /* Gpio is open source type */
-#define FLAG_USED_AS_IRQ 9 /* GPIO is connected to an IRQ */
-
-#define ID_SHIFT 16 /* add new flags before this one */
-
-#define GPIO_FLAGS_MASK ((1 << ID_SHIFT) - 1)
-#define GPIO_TRIGGER_MASK (BIT(FLAG_TRIG_FALL) | BIT(FLAG_TRIG_RISE))
-
-#ifdef CONFIG_DEBUG_FS
- const char *label;
-#endif
-};
static struct gpio_desc gpio_desc[ARCH_NR_GPIOS];
#define GPIO_OFFSET_VALID(chip, offset) (offset >= 0 && offset < chip->ngpio)
static DEFINE_MUTEX(gpio_lookup_lock);
static LIST_HEAD(gpio_lookup_list);
-static LIST_HEAD(gpio_chips);
-
-#ifdef CONFIG_GPIO_SYSFS
-static DEFINE_IDR(dirent_idr);
-#endif
-
-static int gpiod_request(struct gpio_desc *desc, const char *label);
-static void gpiod_free(struct gpio_desc *desc);
-
-/* With descriptor prefix */
-
-#ifdef CONFIG_DEBUG_FS
-#define gpiod_emerg(desc, fmt, ...) \
- pr_emerg("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?",\
- ##__VA_ARGS__)
-#define gpiod_crit(desc, fmt, ...) \
- pr_crit("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
- ##__VA_ARGS__)
-#define gpiod_err(desc, fmt, ...) \
- pr_err("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
- ##__VA_ARGS__)
-#define gpiod_warn(desc, fmt, ...) \
- pr_warn("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
- ##__VA_ARGS__)
-#define gpiod_info(desc, fmt, ...) \
- pr_info("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
- ##__VA_ARGS__)
-#define gpiod_dbg(desc, fmt, ...) \
- pr_debug("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?",\
- ##__VA_ARGS__)
-#else
-#define gpiod_emerg(desc, fmt, ...) \
- pr_emerg("gpio-%d: " fmt, desc_to_gpio(desc), ##__VA_ARGS__)
-#define gpiod_crit(desc, fmt, ...) \
- pr_crit("gpio-%d: " fmt, desc_to_gpio(desc), ##__VA_ARGS__)
-#define gpiod_err(desc, fmt, ...) \
- pr_err("gpio-%d: " fmt, desc_to_gpio(desc), ##__VA_ARGS__)
-#define gpiod_warn(desc, fmt, ...) \
- pr_warn("gpio-%d: " fmt, desc_to_gpio(desc), ##__VA_ARGS__)
-#define gpiod_info(desc, fmt, ...) \
- pr_info("gpio-%d: " fmt, desc_to_gpio(desc), ##__VA_ARGS__)
-#define gpiod_dbg(desc, fmt, ...) \
- pr_debug("gpio-%d: " fmt, desc_to_gpio(desc), ##__VA_ARGS__)
-#endif
-
-/* With chip prefix */
-
-#define chip_emerg(chip, fmt, ...) \
- pr_emerg("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
-#define chip_crit(chip, fmt, ...) \
- pr_crit("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
-#define chip_err(chip, fmt, ...) \
- pr_err("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
-#define chip_warn(chip, fmt, ...) \
- pr_warn("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
-#define chip_info(chip, fmt, ...) \
- pr_info("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
-#define chip_dbg(chip, fmt, ...) \
- pr_debug("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
+LIST_HEAD(gpio_chips);
static inline void desc_set_label(struct gpio_desc *d, const char *label)
{
-#ifdef CONFIG_DEBUG_FS
d->label = label;
-#endif
-}
-
-/*
- * Return the GPIO number of the passed descriptor relative to its chip
- */
-static int gpio_chip_hwgpio(const struct gpio_desc *desc)
-{
- return desc - &desc->chip->desc[0];
}
/**
@@ -174,7 +83,6 @@ struct gpio_desc *gpiochip_get_desc(struct gpio_chip *chip,
return &chip->desc[hwnum];
}
-EXPORT_SYMBOL_GPL(gpiochip_get_desc);
/**
* Convert a GPIO descriptor to the integer namespace.
@@ -188,39 +96,6 @@ int desc_to_gpio(const struct gpio_desc *desc)
EXPORT_SYMBOL_GPL(desc_to_gpio);
-/* Warn when drivers omit gpio_request() calls -- legal but ill-advised
- * when setting direction, and otherwise illegal. Until board setup code
- * and drivers use explicit requests everywhere (which won't happen when
- * those calls have no teeth) we can't avoid autorequesting. This nag
- * message should motivate switching to explicit requests... so should
- * the weaker cleanup after faults, compared to gpio_request().
- *
- * NOTE: the autorequest mechanism is going away; at this point it's
- * only "legal" in the sense that (old) code using it won't break yet,
- * but instead only triggers a WARN() stack dump.
- */
-static int gpio_ensure_requested(struct gpio_desc *desc)
-{
- const struct gpio_chip *chip = desc->chip;
- const int gpio = desc_to_gpio(desc);
-
- if (WARN(test_and_set_bit(FLAG_REQUESTED, &desc->flags) == 0,
- "autorequest GPIO-%d\n", gpio)) {
- if (!try_module_get(chip->owner)) {
- gpiod_err(desc, "%s: module can't be gotten\n",
- __func__);
- clear_bit(FLAG_REQUESTED, &desc->flags);
- /* lose */
- return -EIO;
- }
- desc_set_label(desc, "[auto]");
- /* caller must chip->request() w/o spinlock */
- if (chip->request)
- return 1;
- }
- return 0;
-}
-
/**
* gpiod_to_chip - Return the GPIO chip to which a GPIO descriptor belongs
* @desc: descriptor to return the chip of
@@ -291,836 +166,6 @@ int gpiod_get_direction(const struct gpio_desc *desc)
}
EXPORT_SYMBOL_GPL(gpiod_get_direction);
-#ifdef CONFIG_GPIO_SYSFS
-
-/* lock protects against unexport_gpio() being called while
- * sysfs files are active.
- */
-static DEFINE_MUTEX(sysfs_lock);
-
-/*
- * /sys/class/gpio/gpioN... only for GPIOs that are exported
- * /direction
- * * MAY BE OMITTED if kernel won't allow direction changes
- * * is read/write as "in" or "out"
- * * may also be written as "high" or "low", initializing
- * output value as specified ("out" implies "low")
- * /value
- * * always readable, subject to hardware behavior
- * * may be writable, as zero/nonzero
- * /edge
- * * configures behavior of poll(2) on /value
- * * available only if pin can generate IRQs on input
- * * is read/write as "none", "falling", "rising", or "both"
- * /active_low
- * * configures polarity of /value
- * * is read/write as zero/nonzero
- * * also affects existing and subsequent "falling" and "rising"
- * /edge configuration
- */
-
-static ssize_t gpio_direction_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- const struct gpio_desc *desc = dev_get_drvdata(dev);
- ssize_t status;
-
- mutex_lock(&sysfs_lock);
-
- if (!test_bit(FLAG_EXPORT, &desc->flags)) {
- status = -EIO;
- } else {
- gpiod_get_direction(desc);
- status = sprintf(buf, "%s\n",
- test_bit(FLAG_IS_OUT, &desc->flags)
- ? "out" : "in");
- }
-
- mutex_unlock(&sysfs_lock);
- return status;
-}
-
-static ssize_t gpio_direction_store(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t size)
-{
- struct gpio_desc *desc = dev_get_drvdata(dev);
- ssize_t status;
-
- mutex_lock(&sysfs_lock);
-
- if (!test_bit(FLAG_EXPORT, &desc->flags))
- status = -EIO;
- else if (sysfs_streq(buf, "high"))
- status = gpiod_direction_output_raw(desc, 1);
- else if (sysfs_streq(buf, "out") || sysfs_streq(buf, "low"))
- status = gpiod_direction_output_raw(desc, 0);
- else if (sysfs_streq(buf, "in"))
- status = gpiod_direction_input(desc);
- else
- status = -EINVAL;
-
- mutex_unlock(&sysfs_lock);
- return status ? : size;
-}
-
-static /* const */ DEVICE_ATTR(direction, 0644,
- gpio_direction_show, gpio_direction_store);
-
-static ssize_t gpio_value_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct gpio_desc *desc = dev_get_drvdata(dev);
- ssize_t status;
-
- mutex_lock(&sysfs_lock);
-
- if (!test_bit(FLAG_EXPORT, &desc->flags))
- status = -EIO;
- else
- status = sprintf(buf, "%d\n", gpiod_get_value_cansleep(desc));
-
- mutex_unlock(&sysfs_lock);
- return status;
-}
-
-static ssize_t gpio_value_store(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t size)
-{
- struct gpio_desc *desc = dev_get_drvdata(dev);
- ssize_t status;
-
- mutex_lock(&sysfs_lock);
-
- if (!test_bit(FLAG_EXPORT, &desc->flags))
- status = -EIO;
- else if (!test_bit(FLAG_IS_OUT, &desc->flags))
- status = -EPERM;
- else {
- long value;
-
- status = kstrtol(buf, 0, &value);
- if (status == 0) {
- gpiod_set_value_cansleep(desc, value);
- status = size;
- }
- }
-
- mutex_unlock(&sysfs_lock);
- return status;
-}
-
-static const DEVICE_ATTR(value, 0644,
- gpio_value_show, gpio_value_store);
-
-static irqreturn_t gpio_sysfs_irq(int irq, void *priv)
-{
- struct kernfs_node *value_sd = priv;
-
- sysfs_notify_dirent(value_sd);
- return IRQ_HANDLED;
-}
-
-static int gpio_setup_irq(struct gpio_desc *desc, struct device *dev,
- unsigned long gpio_flags)
-{
- struct kernfs_node *value_sd;
- unsigned long irq_flags;
- int ret, irq, id;
-
- if ((desc->flags & GPIO_TRIGGER_MASK) == gpio_flags)
- return 0;
-
- irq = gpiod_to_irq(desc);
- if (irq < 0)
- return -EIO;
-
- id = desc->flags >> ID_SHIFT;
- value_sd = idr_find(&dirent_idr, id);
- if (value_sd)
- free_irq(irq, value_sd);
-
- desc->flags &= ~GPIO_TRIGGER_MASK;
-
- if (!gpio_flags) {
- gpiod_unlock_as_irq(desc);
- ret = 0;
- goto free_id;
- }
-
- irq_flags = IRQF_SHARED;
- if (test_bit(FLAG_TRIG_FALL, &gpio_flags))
- irq_flags |= test_bit(FLAG_ACTIVE_LOW, &desc->flags) ?
- IRQF_TRIGGER_RISING : IRQF_TRIGGER_FALLING;
- if (test_bit(FLAG_TRIG_RISE, &gpio_flags))
- irq_flags |= test_bit(FLAG_ACTIVE_LOW, &desc->flags) ?
- IRQF_TRIGGER_FALLING : IRQF_TRIGGER_RISING;
-
- if (!value_sd) {
- value_sd = sysfs_get_dirent(dev->kobj.sd, "value");
- if (!value_sd) {
- ret = -ENODEV;
- goto err_out;
- }
-
- ret = idr_alloc(&dirent_idr, value_sd, 1, 0, GFP_KERNEL);
- if (ret < 0)
- goto free_sd;
- id = ret;
-
- desc->flags &= GPIO_FLAGS_MASK;
- desc->flags |= (unsigned long)id << ID_SHIFT;
-
- if (desc->flags >> ID_SHIFT != id) {
- ret = -ERANGE;
- goto free_id;
- }
- }
-
- ret = request_any_context_irq(irq, gpio_sysfs_irq, irq_flags,
- "gpiolib", value_sd);
- if (ret < 0)
- goto free_id;
-
- ret = gpiod_lock_as_irq(desc);
- if (ret < 0) {
- gpiod_warn(desc, "failed to flag the GPIO for IRQ\n");
- goto free_id;
- }
-
- desc->flags |= gpio_flags;
- return 0;
-
-free_id:
- idr_remove(&dirent_idr, id);
- desc->flags &= GPIO_FLAGS_MASK;
-free_sd:
- if (value_sd)
- sysfs_put(value_sd);
-err_out:
- return ret;
-}
-
-static const struct {
- const char *name;
- unsigned long flags;
-} trigger_types[] = {
- { "none", 0 },
- { "falling", BIT(FLAG_TRIG_FALL) },
- { "rising", BIT(FLAG_TRIG_RISE) },
- { "both", BIT(FLAG_TRIG_FALL) | BIT(FLAG_TRIG_RISE) },
-};
-
-static ssize_t gpio_edge_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- const struct gpio_desc *desc = dev_get_drvdata(dev);
- ssize_t status;
-
- mutex_lock(&sysfs_lock);
-
- if (!test_bit(FLAG_EXPORT, &desc->flags))
- status = -EIO;
- else {
- int i;
-
- status = 0;
- for (i = 0; i < ARRAY_SIZE(trigger_types); i++)
- if ((desc->flags & GPIO_TRIGGER_MASK)
- == trigger_types[i].flags) {
- status = sprintf(buf, "%s\n",
- trigger_types[i].name);
- break;
- }
- }
-
- mutex_unlock(&sysfs_lock);
- return status;
-}
-
-static ssize_t gpio_edge_store(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t size)
-{
- struct gpio_desc *desc = dev_get_drvdata(dev);
- ssize_t status;
- int i;
-
- for (i = 0; i < ARRAY_SIZE(trigger_types); i++)
- if (sysfs_streq(trigger_types[i].name, buf))
- goto found;
- return -EINVAL;
-
-found:
- mutex_lock(&sysfs_lock);
-
- if (!test_bit(FLAG_EXPORT, &desc->flags))
- status = -EIO;
- else {
- status = gpio_setup_irq(desc, dev, trigger_types[i].flags);
- if (!status)
- status = size;
- }
-
- mutex_unlock(&sysfs_lock);
-
- return status;
-}
-
-static DEVICE_ATTR(edge, 0644, gpio_edge_show, gpio_edge_store);
-
-static int sysfs_set_active_low(struct gpio_desc *desc, struct device *dev,
- int value)
-{
- int status = 0;
-
- if (!!test_bit(FLAG_ACTIVE_LOW, &desc->flags) == !!value)
- return 0;
-
- if (value)
- set_bit(FLAG_ACTIVE_LOW, &desc->flags);
- else
- clear_bit(FLAG_ACTIVE_LOW, &desc->flags);
-
- /* reconfigure poll(2) support if enabled on one edge only */
- if (dev != NULL && (!!test_bit(FLAG_TRIG_RISE, &desc->flags) ^
- !!test_bit(FLAG_TRIG_FALL, &desc->flags))) {
- unsigned long trigger_flags = desc->flags & GPIO_TRIGGER_MASK;
-
- gpio_setup_irq(desc, dev, 0);
- status = gpio_setup_irq(desc, dev, trigger_flags);
- }
-
- return status;
-}
-
-static ssize_t gpio_active_low_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- const struct gpio_desc *desc = dev_get_drvdata(dev);
- ssize_t status;
-
- mutex_lock(&sysfs_lock);
-
- if (!test_bit(FLAG_EXPORT, &desc->flags))
- status = -EIO;
- else
- status = sprintf(buf, "%d\n",
- !!test_bit(FLAG_ACTIVE_LOW, &desc->flags));
-
- mutex_unlock(&sysfs_lock);
-
- return status;
-}
-
-static ssize_t gpio_active_low_store(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t size)
-{
- struct gpio_desc *desc = dev_get_drvdata(dev);
- ssize_t status;
-
- mutex_lock(&sysfs_lock);
-
- if (!test_bit(FLAG_EXPORT, &desc->flags)) {
- status = -EIO;
- } else {
- long value;
-
- status = kstrtol(buf, 0, &value);
- if (status == 0)
- status = sysfs_set_active_low(desc, dev, value != 0);
- }
-
- mutex_unlock(&sysfs_lock);
-
- return status ? : size;
-}
-
-static const DEVICE_ATTR(active_low, 0644,
- gpio_active_low_show, gpio_active_low_store);
-
-static const struct attribute *gpio_attrs[] = {
- &dev_attr_value.attr,
- &dev_attr_active_low.attr,
- NULL,
-};
-
-static const struct attribute_group gpio_attr_group = {
- .attrs = (struct attribute **) gpio_attrs,
-};
-
-/*
- * /sys/class/gpio/gpiochipN/
- * /base ... matching gpio_chip.base (N)
- * /label ... matching gpio_chip.label
- * /ngpio ... matching gpio_chip.ngpio
- */
-
-static ssize_t chip_base_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- const struct gpio_chip *chip = dev_get_drvdata(dev);
-
- return sprintf(buf, "%d\n", chip->base);
-}
-static DEVICE_ATTR(base, 0444, chip_base_show, NULL);
-
-static ssize_t chip_label_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- const struct gpio_chip *chip = dev_get_drvdata(dev);
-
- return sprintf(buf, "%s\n", chip->label ? : "");
-}
-static DEVICE_ATTR(label, 0444, chip_label_show, NULL);
-
-static ssize_t chip_ngpio_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- const struct gpio_chip *chip = dev_get_drvdata(dev);
-
- return sprintf(buf, "%u\n", chip->ngpio);
-}
-static DEVICE_ATTR(ngpio, 0444, chip_ngpio_show, NULL);
-
-static const struct attribute *gpiochip_attrs[] = {
- &dev_attr_base.attr,
- &dev_attr_label.attr,
- &dev_attr_ngpio.attr,
- NULL,
-};
-
-static const struct attribute_group gpiochip_attr_group = {
- .attrs = (struct attribute **) gpiochip_attrs,
-};
-
-/*
- * /sys/class/gpio/export ... write-only
- * integer N ... number of GPIO to export (full access)
- * /sys/class/gpio/unexport ... write-only
- * integer N ... number of GPIO to unexport
- */
-static ssize_t export_store(struct class *class,
- struct class_attribute *attr,
- const char *buf, size_t len)
-{
- long gpio;
- struct gpio_desc *desc;
- int status;
-
- status = kstrtol(buf, 0, &gpio);
- if (status < 0)
- goto done;
-
- desc = gpio_to_desc(gpio);
- /* reject invalid GPIOs */
- if (!desc) {
- pr_warn("%s: invalid GPIO %ld\n", __func__, gpio);
- return -EINVAL;
- }
-
- /* No extra locking here; FLAG_SYSFS just signifies that the
- * request and export were done by on behalf of userspace, so
- * they may be undone on its behalf too.
- */
-
- status = gpiod_request(desc, "sysfs");
- if (status < 0) {
- if (status == -EPROBE_DEFER)
- status = -ENODEV;
- goto done;
- }
- status = gpiod_export(desc, true);
- if (status < 0)
- gpiod_free(desc);
- else
- set_bit(FLAG_SYSFS, &desc->flags);
-
-done:
- if (status)
- pr_debug("%s: status %d\n", __func__, status);
- return status ? : len;
-}
-
-static ssize_t unexport_store(struct class *class,
- struct class_attribute *attr,
- const char *buf, size_t len)
-{
- long gpio;
- struct gpio_desc *desc;
- int status;
-
- status = kstrtol(buf, 0, &gpio);
- if (status < 0)
- goto done;
-
- desc = gpio_to_desc(gpio);
- /* reject bogus commands (gpio_unexport ignores them) */
- if (!desc) {
- pr_warn("%s: invalid GPIO %ld\n", __func__, gpio);
- return -EINVAL;
- }
-
- status = -EINVAL;
-
- /* No extra locking here; FLAG_SYSFS just signifies that the
- * request and export were done by on behalf of userspace, so
- * they may be undone on its behalf too.
- */
- if (test_and_clear_bit(FLAG_SYSFS, &desc->flags)) {
- status = 0;
- gpiod_free(desc);
- }
-done:
- if (status)
- pr_debug("%s: status %d\n", __func__, status);
- return status ? : len;
-}
-
-static struct class_attribute gpio_class_attrs[] = {
- __ATTR(export, 0200, NULL, export_store),
- __ATTR(unexport, 0200, NULL, unexport_store),
- __ATTR_NULL,
-};
-
-static struct class gpio_class = {
- .name = "gpio",
- .owner = THIS_MODULE,
-
- .class_attrs = gpio_class_attrs,
-};
-
-
-/**
- * gpiod_export - export a GPIO through sysfs
- * @gpio: gpio to make available, already requested
- * @direction_may_change: true if userspace may change gpio direction
- * Context: arch_initcall or later
- *
- * When drivers want to make a GPIO accessible to userspace after they
- * have requested it -- perhaps while debugging, or as part of their
- * public interface -- they may use this routine. If the GPIO can
- * change direction (some can't) and the caller allows it, userspace
- * will see "direction" sysfs attribute which may be used to change
- * the gpio's direction. A "value" attribute will always be provided.
- *
- * Returns zero on success, else an error.
- */
-int gpiod_export(struct gpio_desc *desc, bool direction_may_change)
-{
- unsigned long flags;
- int status;
- const char *ioname = NULL;
- struct device *dev;
- int offset;
-
- /* can't export until sysfs is available ... */
- if (!gpio_class.p) {
- pr_debug("%s: called too early!\n", __func__);
- return -ENOENT;
- }
-
- if (!desc) {
- pr_debug("%s: invalid gpio descriptor\n", __func__);
- return -EINVAL;
- }
-
- mutex_lock(&sysfs_lock);
-
- spin_lock_irqsave(&gpio_lock, flags);
- if (!test_bit(FLAG_REQUESTED, &desc->flags) ||
- test_bit(FLAG_EXPORT, &desc->flags)) {
- spin_unlock_irqrestore(&gpio_lock, flags);
- gpiod_dbg(desc, "%s: unavailable (requested=%d, exported=%d)\n",
- __func__,
- test_bit(FLAG_REQUESTED, &desc->flags),
- test_bit(FLAG_EXPORT, &desc->flags));
- status = -EPERM;
- goto fail_unlock;
- }
-
- if (!desc->chip->direction_input || !desc->chip->direction_output)
- direction_may_change = false;
- spin_unlock_irqrestore(&gpio_lock, flags);
-
- offset = gpio_chip_hwgpio(desc);
- if (desc->chip->names && desc->chip->names[offset])
- ioname = desc->chip->names[offset];
-
- dev = device_create(&gpio_class, desc->chip->dev, MKDEV(0, 0),
- desc, ioname ? ioname : "gpio%u",
- desc_to_gpio(desc));
- if (IS_ERR(dev)) {
- status = PTR_ERR(dev);
- goto fail_unlock;
- }
-
- status = sysfs_create_group(&dev->kobj, &gpio_attr_group);
- if (status)
- goto fail_unregister_device;
-
- if (direction_may_change) {
- status = device_create_file(dev, &dev_attr_direction);
- if (status)
- goto fail_unregister_device;
- }
-
- if (gpiod_to_irq(desc) >= 0 && (direction_may_change ||
- !test_bit(FLAG_IS_OUT, &desc->flags))) {
- status = device_create_file(dev, &dev_attr_edge);
- if (status)
- goto fail_unregister_device;
- }
-
- set_bit(FLAG_EXPORT, &desc->flags);
- mutex_unlock(&sysfs_lock);
- return 0;
-
-fail_unregister_device:
- device_unregister(dev);
-fail_unlock:
- mutex_unlock(&sysfs_lock);
- gpiod_dbg(desc, "%s: status %d\n", __func__, status);
- return status;
-}
-EXPORT_SYMBOL_GPL(gpiod_export);
-
-static int match_export(struct device *dev, const void *data)
-{
- return dev_get_drvdata(dev) == data;
-}
-
-/**
- * gpiod_export_link - create a sysfs link to an exported GPIO node
- * @dev: device under which to create symlink
- * @name: name of the symlink
- * @gpio: gpio to create symlink to, already exported
- *
- * Set up a symlink from /sys/.../dev/name to /sys/class/gpio/gpioN
- * node. Caller is responsible for unlinking.
- *
- * Returns zero on success, else an error.
- */
-int gpiod_export_link(struct device *dev, const char *name,
- struct gpio_desc *desc)
-{
- int status = -EINVAL;
-
- if (!desc) {
- pr_warn("%s: invalid GPIO\n", __func__);
- return -EINVAL;
- }
-
- mutex_lock(&sysfs_lock);
-
- if (test_bit(FLAG_EXPORT, &desc->flags)) {
- struct device *tdev;
-
- tdev = class_find_device(&gpio_class, NULL, desc, match_export);
- if (tdev != NULL) {
- status = sysfs_create_link(&dev->kobj, &tdev->kobj,
- name);
- } else {
- status = -ENODEV;
- }
- }
-
- mutex_unlock(&sysfs_lock);
-
- if (status)
- gpiod_dbg(desc, "%s: status %d\n", __func__, status);
-
- return status;
-}
-EXPORT_SYMBOL_GPL(gpiod_export_link);
-
-/**
- * gpiod_sysfs_set_active_low - set the polarity of gpio sysfs value
- * @gpio: gpio to change
- * @value: non-zero to use active low, i.e. inverted values
- *
- * Set the polarity of /sys/class/gpio/gpioN/value sysfs attribute.
- * The GPIO does not have to be exported yet. If poll(2) support has
- * been enabled for either rising or falling edge, it will be
- * reconfigured to follow the new polarity.
- *
- * Returns zero on success, else an error.
- */
-int gpiod_sysfs_set_active_low(struct gpio_desc *desc, int value)
-{
- struct device *dev = NULL;
- int status = -EINVAL;
-
- if (!desc) {
- pr_warn("%s: invalid GPIO\n", __func__);
- return -EINVAL;
- }
-
- mutex_lock(&sysfs_lock);
-
- if (test_bit(FLAG_EXPORT, &desc->flags)) {
- dev = class_find_device(&gpio_class, NULL, desc, match_export);
- if (dev == NULL) {
- status = -ENODEV;
- goto unlock;
- }
- }
-
- status = sysfs_set_active_low(desc, dev, value);
-
-unlock:
- mutex_unlock(&sysfs_lock);
-
- if (status)
- gpiod_dbg(desc, "%s: status %d\n", __func__, status);
-
- return status;
-}
-EXPORT_SYMBOL_GPL(gpiod_sysfs_set_active_low);
-
-/**
- * gpiod_unexport - reverse effect of gpio_export()
- * @gpio: gpio to make unavailable
- *
- * This is implicit on gpio_free().
- */
-void gpiod_unexport(struct gpio_desc *desc)
-{
- int status = 0;
- struct device *dev = NULL;
-
- if (!desc) {
- pr_warn("%s: invalid GPIO\n", __func__);
- return;
- }
-
- mutex_lock(&sysfs_lock);
-
- if (test_bit(FLAG_EXPORT, &desc->flags)) {
-
- dev = class_find_device(&gpio_class, NULL, desc, match_export);
- if (dev) {
- gpio_setup_irq(desc, dev, 0);
- clear_bit(FLAG_EXPORT, &desc->flags);
- } else
- status = -ENODEV;
- }
-
- mutex_unlock(&sysfs_lock);
-
- if (dev) {
- device_unregister(dev);
- put_device(dev);
- }
-
- if (status)
- gpiod_dbg(desc, "%s: status %d\n", __func__, status);
-}
-EXPORT_SYMBOL_GPL(gpiod_unexport);
-
-static int gpiochip_export(struct gpio_chip *chip)
-{
- int status;
- struct device *dev;
-
- /* Many systems register gpio chips for SOC support very early,
- * before driver model support is available. In those cases we
- * export this later, in gpiolib_sysfs_init() ... here we just
- * verify that _some_ field of gpio_class got initialized.
- */
- if (!gpio_class.p)
- return 0;
-
- /* use chip->base for the ID; it's already known to be unique */
- mutex_lock(&sysfs_lock);
- dev = device_create(&gpio_class, chip->dev, MKDEV(0, 0), chip,
- "gpiochip%d", chip->base);
- if (!IS_ERR(dev)) {
- status = sysfs_create_group(&dev->kobj,
- &gpiochip_attr_group);
- } else
- status = PTR_ERR(dev);
- chip->exported = (status == 0);
- mutex_unlock(&sysfs_lock);
-
- if (status) {
- unsigned long flags;
- unsigned gpio;
-
- spin_lock_irqsave(&gpio_lock, flags);
- gpio = 0;
- while (gpio < chip->ngpio)
- chip->desc[gpio++].chip = NULL;
- spin_unlock_irqrestore(&gpio_lock, flags);
-
- chip_dbg(chip, "%s: status %d\n", __func__, status);
- }
-
- return status;
-}
-
-static void gpiochip_unexport(struct gpio_chip *chip)
-{
- int status;
- struct device *dev;
-
- mutex_lock(&sysfs_lock);
- dev = class_find_device(&gpio_class, NULL, chip, match_export);
- if (dev) {
- put_device(dev);
- device_unregister(dev);
- chip->exported = false;
- status = 0;
- } else
- status = -ENODEV;
- mutex_unlock(&sysfs_lock);
-
- if (status)
- chip_dbg(chip, "%s: status %d\n", __func__, status);
-}
-
-static int __init gpiolib_sysfs_init(void)
-{
- int status;
- unsigned long flags;
- struct gpio_chip *chip;
-
- status = class_register(&gpio_class);
- if (status < 0)
- return status;
-
- /* Scan and register the gpio_chips which registered very
- * early (e.g. before the class_register above was called).
- *
- * We run before arch_initcall() so chip->dev nodes can have
- * registered, and so arch_initcall() can always gpio_export().
- */
- spin_lock_irqsave(&gpio_lock, flags);
- list_for_each_entry(chip, &gpio_chips, list) {
- if (!chip || chip->exported)
- continue;
-
- spin_unlock_irqrestore(&gpio_lock, flags);
- status = gpiochip_export(chip);
- spin_lock_irqsave(&gpio_lock, flags);
- }
- spin_unlock_irqrestore(&gpio_lock, flags);
-
-
- return status;
-}
-postcore_initcall(gpiolib_sysfs_init);
-
-#else
-static inline int gpiochip_export(struct gpio_chip *chip)
-{
- return 0;
-}
-
-static inline void gpiochip_unexport(struct gpio_chip *chip)
-{
-}
-
-#endif /* CONFIG_GPIO_SYSFS */
-
/*
* Add a new chip to the global chips list, keeping the list of chips sorted
* by base order.
@@ -1474,6 +519,8 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip)
{
unsigned int offset;
+ acpi_gpiochip_free_interrupts(gpiochip);
+
/* Remove all IRQ mappings and delete the domain */
if (gpiochip->irqdomain) {
for (offset = 0; offset < gpiochip->ngpio; offset++)
@@ -1567,6 +614,8 @@ int gpiochip_irqchip_add(struct gpio_chip *gpiochip,
gpiochip->irq_base = irq_base;
}
+ acpi_gpiochip_request_interrupts(gpiochip);
+
return 0;
}
EXPORT_SYMBOL_GPL(gpiochip_irqchip_add);
@@ -1740,7 +789,7 @@ done:
return status;
}
-static int gpiod_request(struct gpio_desc *desc, const char *label)
+int gpiod_request(struct gpio_desc *desc, const char *label)
{
int status = -EPROBE_DEFER;
struct gpio_chip *chip;
@@ -1767,12 +816,6 @@ done:
return status;
}
-int gpio_request(unsigned gpio, const char *label)
-{
- return gpiod_request(gpio_to_desc(gpio), label);
-}
-EXPORT_SYMBOL_GPL(gpio_request);
-
static bool __gpiod_free(struct gpio_desc *desc)
{
bool ret = false;
@@ -1805,7 +848,7 @@ static bool __gpiod_free(struct gpio_desc *desc)
return ret;
}
-static void gpiod_free(struct gpio_desc *desc)
+void gpiod_free(struct gpio_desc *desc)
{
if (desc && __gpiod_free(desc))
module_put(desc->chip->owner);
@@ -1813,101 +856,14 @@ static void gpiod_free(struct gpio_desc *desc)
WARN_ON(extra_checks);
}
-void gpio_free(unsigned gpio)
-{
- gpiod_free(gpio_to_desc(gpio));
-}
-EXPORT_SYMBOL_GPL(gpio_free);
-
-/**
- * gpio_request_one - request a single GPIO with initial configuration
- * @gpio: the GPIO number
- * @flags: GPIO configuration as specified by GPIOF_*
- * @label: a literal description string of this GPIO
- */
-int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
-{
- struct gpio_desc *desc;
- int err;
-
- desc = gpio_to_desc(gpio);
-
- err = gpiod_request(desc, label);
- if (err)
- return err;
-
- if (flags & GPIOF_OPEN_DRAIN)
- set_bit(FLAG_OPEN_DRAIN, &desc->flags);
-
- if (flags & GPIOF_OPEN_SOURCE)
- set_bit(FLAG_OPEN_SOURCE, &desc->flags);
-
- if (flags & GPIOF_DIR_IN)
- err = gpiod_direction_input(desc);
- else
- err = gpiod_direction_output_raw(desc,
- (flags & GPIOF_INIT_HIGH) ? 1 : 0);
-
- if (err)
- goto free_gpio;
-
- if (flags & GPIOF_EXPORT) {
- err = gpiod_export(desc, flags & GPIOF_EXPORT_CHANGEABLE);
- if (err)
- goto free_gpio;
- }
-
- return 0;
-
- free_gpio:
- gpiod_free(desc);
- return err;
-}
-EXPORT_SYMBOL_GPL(gpio_request_one);
-
-/**
- * gpio_request_array - request multiple GPIOs in a single call
- * @array: array of the 'struct gpio'
- * @num: how many GPIOs in the array
- */
-int gpio_request_array(const struct gpio *array, size_t num)
-{
- int i, err;
-
- for (i = 0; i < num; i++, array++) {
- err = gpio_request_one(array->gpio, array->flags, array->label);
- if (err)
- goto err_free;
- }
- return 0;
-
-err_free:
- while (i--)
- gpio_free((--array)->gpio);
- return err;
-}
-EXPORT_SYMBOL_GPL(gpio_request_array);
-
-/**
- * gpio_free_array - release multiple GPIOs in a single call
- * @array: array of the 'struct gpio'
- * @num: how many GPIOs in the array
- */
-void gpio_free_array(const struct gpio *array, size_t num)
-{
- while (num--)
- gpio_free((array++)->gpio);
-}
-EXPORT_SYMBOL_GPL(gpio_free_array);
-
/**
* gpiochip_is_requested - return string iff signal was requested
* @chip: controller managing the signal
* @offset: of signal within controller's 0..(ngpio - 1) range
*
* Returns NULL if the GPIO is not currently requested, else a string.
- * If debugfs support is enabled, the string returned is the label passed
- * to gpio_request(); otherwise it is a meaningless constant.
+ * The string returned is the label passed to gpio_request(); if none has been
+ * passed it is a meaningless, non-NULL constant.
*
* This function is for use by GPIO controller drivers. The label can
* help with diagnostics, and knowing that the signal is used as a GPIO
@@ -1924,11 +880,7 @@ const char *gpiochip_is_requested(struct gpio_chip *chip, unsigned offset)
if (test_bit(FLAG_REQUESTED, &desc->flags) == 0)
return NULL;
-#ifdef CONFIG_DEBUG_FS
return desc->label;
-#else
- return "?";
-#endif
}
EXPORT_SYMBOL_GPL(gpiochip_is_requested);
@@ -1950,6 +902,7 @@ int gpiochip_request_own_desc(struct gpio_desc *desc, const char *label)
return __gpiod_request(desc, label);
}
+EXPORT_SYMBOL_GPL(gpiochip_request_own_desc);
/**
* gpiochip_free_own_desc - Free GPIO requested by the chip driver
@@ -1963,6 +916,7 @@ void gpiochip_free_own_desc(struct gpio_desc *desc)
if (desc)
__gpiod_free(desc);
}
+EXPORT_SYMBOL_GPL(gpiochip_free_own_desc);
/* Drivers MUST set GPIO direction before making get/set calls. In
* some cases this is done in early boot, before IRQs are enabled.
@@ -1984,10 +938,8 @@ void gpiochip_free_own_desc(struct gpio_desc *desc)
*/
int gpiod_direction_input(struct gpio_desc *desc)
{
- unsigned long flags;
struct gpio_chip *chip;
int status = -EINVAL;
- int offset;
if (!desc || !desc->chip) {
pr_warn("%s: invalid GPIO\n", __func__);
@@ -2002,52 +954,20 @@ int gpiod_direction_input(struct gpio_desc *desc)
return -EIO;
}
- spin_lock_irqsave(&gpio_lock, flags);
-
- status = gpio_ensure_requested(desc);
- if (status < 0)
- goto fail;
-
- /* now we know the gpio is valid and chip won't vanish */
-
- spin_unlock_irqrestore(&gpio_lock, flags);
-
- might_sleep_if(chip->can_sleep);
-
- offset = gpio_chip_hwgpio(desc);
- if (status) {
- status = chip->request(chip, offset);
- if (status < 0) {
- gpiod_dbg(desc, "%s: chip request fail, %d\n",
- __func__, status);
- /* and it's not available to anyone else ...
- * gpio_request() is the fully clean solution.
- */
- goto lose;
- }
- }
-
- status = chip->direction_input(chip, offset);
+ status = chip->direction_input(chip, gpio_chip_hwgpio(desc));
if (status == 0)
clear_bit(FLAG_IS_OUT, &desc->flags);
trace_gpio_direction(desc_to_gpio(desc), 1, status);
-lose:
- return status;
-fail:
- spin_unlock_irqrestore(&gpio_lock, flags);
- if (status)
- gpiod_dbg(desc, "%s: status %d\n", __func__, status);
+
return status;
}
EXPORT_SYMBOL_GPL(gpiod_direction_input);
static int _gpiod_direction_output_raw(struct gpio_desc *desc, int value)
{
- unsigned long flags;
struct gpio_chip *chip;
int status = -EINVAL;
- int offset;
/* GPIOs used for IRQs shall not be set as output */
if (test_bit(FLAG_USED_AS_IRQ, &desc->flags)) {
@@ -2073,42 +993,11 @@ static int _gpiod_direction_output_raw(struct gpio_desc *desc, int value)
return -EIO;
}
- spin_lock_irqsave(&gpio_lock, flags);
-
- status = gpio_ensure_requested(desc);
- if (status < 0)
- goto fail;
-
- /* now we know the gpio is valid and chip won't vanish */
-
- spin_unlock_irqrestore(&gpio_lock, flags);
-
- might_sleep_if(chip->can_sleep);
-
- offset = gpio_chip_hwgpio(desc);
- if (status) {
- status = chip->request(chip, offset);
- if (status < 0) {
- gpiod_dbg(desc, "%s: chip request fail, %d\n",
- __func__, status);
- /* and it's not available to anyone else ...
- * gpio_request() is the fully clean solution.
- */
- goto lose;
- }
- }
-
- status = chip->direction_output(chip, offset, value);
+ status = chip->direction_output(chip, gpio_chip_hwgpio(desc), value);
if (status == 0)
set_bit(FLAG_IS_OUT, &desc->flags);
trace_gpio_value(desc_to_gpio(desc), 0, value);
trace_gpio_direction(desc_to_gpio(desc), 0, status);
-lose:
- return status;
-fail:
- spin_unlock_irqrestore(&gpio_lock, flags);
- if (status)
- gpiod_dbg(desc, "%s: gpio status %d\n", __func__, status);
return status;
}
@@ -2167,10 +1056,7 @@ EXPORT_SYMBOL_GPL(gpiod_direction_output);
*/
int gpiod_set_debounce(struct gpio_desc *desc, unsigned debounce)
{
- unsigned long flags;
struct gpio_chip *chip;
- int status = -EINVAL;
- int offset;
if (!desc || !desc->chip) {
pr_warn("%s: invalid GPIO\n", __func__);
@@ -2185,27 +1071,7 @@ int gpiod_set_debounce(struct gpio_desc *desc, unsigned debounce)
return -ENOTSUPP;
}
- spin_lock_irqsave(&gpio_lock, flags);
-
- status = gpio_ensure_requested(desc);
- if (status < 0)
- goto fail;
-
- /* now we know the gpio is valid and chip won't vanish */
-
- spin_unlock_irqrestore(&gpio_lock, flags);
-
- might_sleep_if(chip->can_sleep);
-
- offset = gpio_chip_hwgpio(desc);
- return chip->set_debounce(chip, offset, debounce);
-
-fail:
- spin_unlock_irqrestore(&gpio_lock, flags);
- if (status)
- gpiod_dbg(desc, "%s: status %d\n", __func__, status);
-
- return status;
+ return chip->set_debounce(chip, gpio_chip_hwgpio(desc), debounce);
}
EXPORT_SYMBOL_GPL(gpiod_set_debounce);
@@ -2448,54 +1314,44 @@ int gpiod_to_irq(const struct gpio_desc *desc)
EXPORT_SYMBOL_GPL(gpiod_to_irq);
/**
- * gpiod_lock_as_irq() - lock a GPIO to be used as IRQ
- * @gpio: the GPIO line to lock as used for IRQ
+ * gpio_lock_as_irq() - lock a GPIO to be used as IRQ
+ * @chip: the chip the GPIO to lock belongs to
+ * @offset: the offset of the GPIO to lock as IRQ
*
* This is used directly by GPIO drivers that want to lock down
* a certain GPIO line to be used for IRQs.
*/
-int gpiod_lock_as_irq(struct gpio_desc *desc)
+int gpio_lock_as_irq(struct gpio_chip *chip, unsigned int offset)
{
- if (!desc)
+ if (offset >= chip->ngpio)
return -EINVAL;
- if (test_bit(FLAG_IS_OUT, &desc->flags)) {
- gpiod_err(desc,
+ if (test_bit(FLAG_IS_OUT, &chip->desc[offset].flags)) {
+ chip_err(chip,
"%s: tried to flag a GPIO set as output for IRQ\n",
__func__);
return -EIO;
}
- set_bit(FLAG_USED_AS_IRQ, &desc->flags);
+ set_bit(FLAG_USED_AS_IRQ, &chip->desc[offset].flags);
return 0;
}
-EXPORT_SYMBOL_GPL(gpiod_lock_as_irq);
-
-int gpio_lock_as_irq(struct gpio_chip *chip, unsigned int offset)
-{
- return gpiod_lock_as_irq(gpiochip_get_desc(chip, offset));
-}
EXPORT_SYMBOL_GPL(gpio_lock_as_irq);
/**
- * gpiod_unlock_as_irq() - unlock a GPIO used as IRQ
- * @gpio: the GPIO line to unlock from IRQ usage
+ * gpio_unlock_as_irq() - unlock a GPIO used as IRQ
+ * @chip: the chip the GPIO to lock belongs to
+ * @offset: the offset of the GPIO to lock as IRQ
*
* This is used directly by GPIO drivers that want to indicate
* that a certain GPIO is no longer used exclusively for IRQ.
*/
-void gpiod_unlock_as_irq(struct gpio_desc *desc)
+void gpio_unlock_as_irq(struct gpio_chip *chip, unsigned int offset)
{
- if (!desc)
+ if (offset >= chip->ngpio)
return;
- clear_bit(FLAG_USED_AS_IRQ, &desc->flags);
-}
-EXPORT_SYMBOL_GPL(gpiod_unlock_as_irq);
-
-void gpio_unlock_as_irq(struct gpio_chip *chip, unsigned int offset)
-{
- return gpiod_unlock_as_irq(gpiochip_get_desc(chip, offset));
+ clear_bit(FLAG_USED_AS_IRQ, &chip->desc[offset].flags);
}
EXPORT_SYMBOL_GPL(gpio_unlock_as_irq);
@@ -2726,38 +1582,43 @@ static struct gpio_desc *gpiod_find(struct device *dev, const char *con_id,
* gpiod_get - obtain a GPIO for a given GPIO function
* @dev: GPIO consumer, can be NULL for system-global GPIOs
* @con_id: function within the GPIO consumer
+ * @flags: optional GPIO initialization flags
*
* Return the GPIO descriptor corresponding to the function con_id of device
* dev, -ENOENT if no GPIO has been assigned to the requested function, or
* another IS_ERR() code if an error occured while trying to acquire the GPIO.
*/
-struct gpio_desc *__must_check gpiod_get(struct device *dev, const char *con_id)
+struct gpio_desc *__must_check __gpiod_get(struct device *dev, const char *con_id,
+ enum gpiod_flags flags)
{
- return gpiod_get_index(dev, con_id, 0);
+ return gpiod_get_index(dev, con_id, 0, flags);
}
-EXPORT_SYMBOL_GPL(gpiod_get);
+EXPORT_SYMBOL_GPL(__gpiod_get);
/**
* gpiod_get_optional - obtain an optional GPIO for a given GPIO function
* @dev: GPIO consumer, can be NULL for system-global GPIOs
* @con_id: function within the GPIO consumer
+ * @flags: optional GPIO initialization flags
*
* This is equivalent to gpiod_get(), except that when no GPIO was assigned to
* the requested function it will return NULL. This is convenient for drivers
* that need to handle optional GPIOs.
*/
-struct gpio_desc *__must_check gpiod_get_optional(struct device *dev,
- const char *con_id)
+struct gpio_desc *__must_check __gpiod_get_optional(struct device *dev,
+ const char *con_id,
+ enum gpiod_flags flags)
{
- return gpiod_get_index_optional(dev, con_id, 0);
+ return gpiod_get_index_optional(dev, con_id, 0, flags);
}
-EXPORT_SYMBOL_GPL(gpiod_get_optional);
+EXPORT_SYMBOL_GPL(__gpiod_get_optional);
/**
* gpiod_get_index - obtain a GPIO from a multi-index GPIO function
* @dev: GPIO consumer, can be NULL for system-global GPIOs
* @con_id: function within the GPIO consumer
* @idx: index of the GPIO to obtain in the consumer
+ * @flags: optional GPIO initialization flags
*
* This variant of gpiod_get() allows to access GPIOs other than the first
* defined one for functions that define several GPIOs.
@@ -2766,23 +1627,24 @@ EXPORT_SYMBOL_GPL(gpiod_get_optional);
* requested function and/or index, or another IS_ERR() code if an error
* occured while trying to acquire the GPIO.
*/
-struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
+struct gpio_desc *__must_check __gpiod_get_index(struct device *dev,
const char *con_id,
- unsigned int idx)
+ unsigned int idx,
+ enum gpiod_flags flags)
{
struct gpio_desc *desc = NULL;
int status;
- enum gpio_lookup_flags flags = 0;
+ enum gpio_lookup_flags lookupflags = 0;
dev_dbg(dev, "GPIO lookup for consumer %s\n", con_id);
/* Using device tree? */
if (IS_ENABLED(CONFIG_OF) && dev && dev->of_node) {
dev_dbg(dev, "using device tree for GPIO lookup\n");
- desc = of_find_gpio(dev, con_id, idx, &flags);
+ desc = of_find_gpio(dev, con_id, idx, &lookupflags);
} else if (IS_ENABLED(CONFIG_ACPI) && dev && ACPI_HANDLE(dev)) {
dev_dbg(dev, "using ACPI for GPIO lookup\n");
- desc = acpi_find_gpio(dev, con_id, idx, &flags);
+ desc = acpi_find_gpio(dev, con_id, idx, &lookupflags);
}
/*
@@ -2791,7 +1653,7 @@ struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
*/
if (!desc || desc == ERR_PTR(-ENOENT)) {
dev_dbg(dev, "using lookup tables for GPIO lookup");
- desc = gpiod_find(dev, con_id, idx, &flags);
+ desc = gpiod_find(dev, con_id, idx, &lookupflags);
}
if (IS_ERR(desc)) {
@@ -2804,16 +1666,33 @@ struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
if (status < 0)
return ERR_PTR(status);
- if (flags & GPIO_ACTIVE_LOW)
+ if (lookupflags & GPIO_ACTIVE_LOW)
set_bit(FLAG_ACTIVE_LOW, &desc->flags);
- if (flags & GPIO_OPEN_DRAIN)
+ if (lookupflags & GPIO_OPEN_DRAIN)
set_bit(FLAG_OPEN_DRAIN, &desc->flags);
- if (flags & GPIO_OPEN_SOURCE)
+ if (lookupflags & GPIO_OPEN_SOURCE)
set_bit(FLAG_OPEN_SOURCE, &desc->flags);
+ /* No particular flag request, return here... */
+ if (flags & GPIOD_FLAGS_BIT_DIR_SET)
+ return desc;
+
+ /* Process flags */
+ if (flags & GPIOD_FLAGS_BIT_DIR_OUT)
+ status = gpiod_direction_output(desc,
+ flags & GPIOD_FLAGS_BIT_DIR_VAL);
+ else
+ status = gpiod_direction_input(desc);
+
+ if (status < 0) {
+ dev_dbg(dev, "setup of GPIO %s failed\n", con_id);
+ gpiod_put(desc);
+ return ERR_PTR(status);
+ }
+
return desc;
}
-EXPORT_SYMBOL_GPL(gpiod_get_index);
+EXPORT_SYMBOL_GPL(__gpiod_get_index);
/**
* gpiod_get_index_optional - obtain an optional GPIO from a multi-index GPIO
@@ -2821,18 +1700,20 @@ EXPORT_SYMBOL_GPL(gpiod_get_index);
* @dev: GPIO consumer, can be NULL for system-global GPIOs
* @con_id: function within the GPIO consumer
* @index: index of the GPIO to obtain in the consumer
+ * @flags: optional GPIO initialization flags
*
* This is equivalent to gpiod_get_index(), except that when no GPIO with the
* specified index was assigned to the requested function it will return NULL.
* This is convenient for drivers that need to handle optional GPIOs.
*/
-struct gpio_desc *__must_check gpiod_get_index_optional(struct device *dev,
+struct gpio_desc *__must_check __gpiod_get_index_optional(struct device *dev,
const char *con_id,
- unsigned int index)
+ unsigned int index,
+ enum gpiod_flags flags)
{
struct gpio_desc *desc;
- desc = gpiod_get_index(dev, con_id, index);
+ desc = gpiod_get_index(dev, con_id, index, flags);
if (IS_ERR(desc)) {
if (PTR_ERR(desc) == -ENOENT)
return NULL;
@@ -2840,7 +1721,7 @@ struct gpio_desc *__must_check gpiod_get_index_optional(struct device *dev,
return desc;
}
-EXPORT_SYMBOL_GPL(gpiod_get_index_optional);
+EXPORT_SYMBOL_GPL(__gpiod_get_index_optional);
/**
* gpiod_put - dispose of a GPIO descriptor
diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h
index 1a4103dd38df..9db2b6a71c5d 100644
--- a/drivers/gpio/gpiolib.h
+++ b/drivers/gpio/gpiolib.h
@@ -31,12 +31,21 @@ struct acpi_gpio_info {
void acpi_gpiochip_add(struct gpio_chip *chip);
void acpi_gpiochip_remove(struct gpio_chip *chip);
+void acpi_gpiochip_request_interrupts(struct gpio_chip *chip);
+void acpi_gpiochip_free_interrupts(struct gpio_chip *chip);
+
struct gpio_desc *acpi_get_gpiod_by_index(struct device *dev, int index,
struct acpi_gpio_info *info);
#else
static inline void acpi_gpiochip_add(struct gpio_chip *chip) { }
static inline void acpi_gpiochip_remove(struct gpio_chip *chip) { }
+static inline void
+acpi_gpiochip_request_interrupts(struct gpio_chip *chip) { }
+
+static inline void
+acpi_gpiochip_free_interrupts(struct gpio_chip *chip) { }
+
static inline struct gpio_desc *
acpi_get_gpiod_by_index(struct device *dev, int index,
struct acpi_gpio_info *info)
@@ -45,10 +54,100 @@ acpi_get_gpiod_by_index(struct device *dev, int index,
}
#endif
-int gpiochip_request_own_desc(struct gpio_desc *desc, const char *label);
-void gpiochip_free_own_desc(struct gpio_desc *desc);
-
struct gpio_desc *of_get_named_gpiod_flags(struct device_node *np,
const char *list_name, int index, enum of_gpio_flags *flags);
+struct gpio_desc *gpiochip_get_desc(struct gpio_chip *chip, u16 hwnum);
+
+extern struct spinlock gpio_lock;
+extern struct list_head gpio_chips;
+
+struct gpio_desc {
+ struct gpio_chip *chip;
+ unsigned long flags;
+/* flag symbols are bit numbers */
+#define FLAG_REQUESTED 0
+#define FLAG_IS_OUT 1
+#define FLAG_EXPORT 2 /* protected by sysfs_lock */
+#define FLAG_SYSFS 3 /* exported via /sys/class/gpio/control */
+#define FLAG_TRIG_FALL 4 /* trigger on falling edge */
+#define FLAG_TRIG_RISE 5 /* trigger on rising edge */
+#define FLAG_ACTIVE_LOW 6 /* value has active low */
+#define FLAG_OPEN_DRAIN 7 /* Gpio is open drain type */
+#define FLAG_OPEN_SOURCE 8 /* Gpio is open source type */
+#define FLAG_USED_AS_IRQ 9 /* GPIO is connected to an IRQ */
+
+#define ID_SHIFT 16 /* add new flags before this one */
+
+#define GPIO_FLAGS_MASK ((1 << ID_SHIFT) - 1)
+#define GPIO_TRIGGER_MASK (BIT(FLAG_TRIG_FALL) | BIT(FLAG_TRIG_RISE))
+
+ const char *label;
+};
+
+int gpiod_request(struct gpio_desc *desc, const char *label);
+void gpiod_free(struct gpio_desc *desc);
+
+/*
+ * Return the GPIO number of the passed descriptor relative to its chip
+ */
+static int __maybe_unused gpio_chip_hwgpio(const struct gpio_desc *desc)
+{
+ return desc - &desc->chip->desc[0];
+}
+
+/* With descriptor prefix */
+
+#define gpiod_emerg(desc, fmt, ...) \
+ pr_emerg("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?",\
+ ##__VA_ARGS__)
+#define gpiod_crit(desc, fmt, ...) \
+ pr_crit("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
+ ##__VA_ARGS__)
+#define gpiod_err(desc, fmt, ...) \
+ pr_err("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
+ ##__VA_ARGS__)
+#define gpiod_warn(desc, fmt, ...) \
+ pr_warn("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
+ ##__VA_ARGS__)
+#define gpiod_info(desc, fmt, ...) \
+ pr_info("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
+ ##__VA_ARGS__)
+#define gpiod_dbg(desc, fmt, ...) \
+ pr_debug("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?",\
+ ##__VA_ARGS__)
+
+/* With chip prefix */
+
+#define chip_emerg(chip, fmt, ...) \
+ pr_emerg("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
+#define chip_crit(chip, fmt, ...) \
+ pr_crit("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
+#define chip_err(chip, fmt, ...) \
+ pr_err("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
+#define chip_warn(chip, fmt, ...) \
+ pr_warn("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
+#define chip_info(chip, fmt, ...) \
+ pr_info("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
+#define chip_dbg(chip, fmt, ...) \
+ pr_debug("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
+
+#ifdef CONFIG_GPIO_SYSFS
+
+int gpiochip_export(struct gpio_chip *chip);
+void gpiochip_unexport(struct gpio_chip *chip);
+
+#else
+
+static inline int gpiochip_export(struct gpio_chip *chip)
+{
+ return 0;
+}
+
+static inline void gpiochip_unexport(struct gpio_chip *chip)
+{
+}
+
+#endif /* CONFIG_GPIO_SYSFS */
+
#endif /* GPIOLIB_H */
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
index 23e364538ab5..c1d4105e1c1d 100644
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -110,9 +110,6 @@ static inline int __gpio_to_irq(unsigned gpio)
return gpiod_to_irq(gpio_to_desc(gpio));
}
-extern int gpio_lock_as_irq(struct gpio_chip *chip, unsigned int offset);
-extern void gpio_unlock_as_irq(struct gpio_chip *chip, unsigned int offset);
-
extern int gpio_request_one(unsigned gpio, unsigned long flags, const char *label);
extern int gpio_request_array(const struct gpio *array, size_t num);
extern void gpio_free_array(const struct gpio *array, size_t num);
diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h
index 05e53ccb708b..b7ce0c64c6f3 100644
--- a/include/linux/gpio/consumer.h
+++ b/include/linux/gpio/consumer.h
@@ -18,30 +18,79 @@ struct gpio_desc;
#ifdef CONFIG_GPIOLIB
+#define GPIOD_FLAGS_BIT_DIR_SET BIT(0)
+#define GPIOD_FLAGS_BIT_DIR_OUT BIT(1)
+#define GPIOD_FLAGS_BIT_DIR_VAL BIT(2)
+
+/**
+ * Optional flags that can be passed to one of gpiod_* to configure direction
+ * and output value. These values cannot be OR'd.
+ */
+enum gpiod_flags {
+ GPIOD_ASIS = 0,
+ GPIOD_IN = GPIOD_FLAGS_BIT_DIR_SET,
+ GPIOD_OUT_LOW = GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT,
+ GPIOD_OUT_HIGH = GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT |
+ GPIOD_FLAGS_BIT_DIR_VAL,
+};
+
/* Acquire and dispose GPIOs */
-struct gpio_desc *__must_check gpiod_get(struct device *dev,
- const char *con_id);
-struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
+struct gpio_desc *__must_check __gpiod_get(struct device *dev,
+ const char *con_id,
+ enum gpiod_flags flags);
+#define __gpiod_get(dev, con_id, flags, ...) __gpiod_get(dev, con_id, flags)
+#define gpiod_get(varargs...) __gpiod_get(varargs, 0)
+struct gpio_desc *__must_check __gpiod_get_index(struct device *dev,
const char *con_id,
- unsigned int idx);
-struct gpio_desc *__must_check gpiod_get_optional(struct device *dev,
- const char *con_id);
-struct gpio_desc *__must_check gpiod_get_index_optional(struct device *dev,
+ unsigned int idx,
+ enum gpiod_flags flags);
+#define __gpiod_get_index(dev, con_id, index, flags, ...) \
+ __gpiod_get_index(dev, con_id, index, flags)
+#define gpiod_get_index(varargs...) __gpiod_get_index(varargs, 0)
+struct gpio_desc *__must_check __gpiod_get_optional(struct device *dev,
+ const char *con_id,
+ enum gpiod_flags flags);
+#define __gpiod_get_optional(dev, con_id, flags, ...) \
+ __gpiod_get_optional(dev, con_id, flags)
+#define gpiod_get_optional(varargs...) __gpiod_get_optional(varargs, 0)
+struct gpio_desc *__must_check __gpiod_get_index_optional(struct device *dev,
const char *con_id,
- unsigned int index);
+ unsigned int index,
+ enum gpiod_flags flags);
+#define __gpiod_get_index_optional(dev, con_id, index, flags, ...) \
+ __gpiod_get_index_optional(dev, con_id, index, flags)
+#define gpiod_get_index_optional(varargs...) \
+ __gpiod_get_index_optional(varargs, 0)
void gpiod_put(struct gpio_desc *desc);
-struct gpio_desc *__must_check devm_gpiod_get(struct device *dev,
- const char *con_id);
-struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev,
+struct gpio_desc *__must_check __devm_gpiod_get(struct device *dev,
+ const char *con_id,
+ enum gpiod_flags flags);
+#define __devm_gpiod_get(dev, con_id, flags, ...) \
+ __devm_gpiod_get(dev, con_id, flags)
+#define devm_gpiod_get(varargs...) __devm_gpiod_get(varargs, 0)
+struct gpio_desc *__must_check __devm_gpiod_get_index(struct device *dev,
const char *con_id,
- unsigned int idx);
-struct gpio_desc *__must_check devm_gpiod_get_optional(struct device *dev,
- const char *con_id);
+ unsigned int idx,
+ enum gpiod_flags flags);
+#define __devm_gpiod_get_index(dev, con_id, index, flags, ...) \
+ __devm_gpiod_get_index(dev, con_id, index, flags)
+#define devm_gpiod_get_index(varargs...) __devm_gpiod_get_index(varargs, 0)
+struct gpio_desc *__must_check __devm_gpiod_get_optional(struct device *dev,
+ const char *con_id,
+ enum gpiod_flags flags);
+#define __devm_gpiod_get_optional(dev, con_id, flags, ...) \
+ __devm_gpiod_get_optional(dev, con_id, flags)
+#define devm_gpiod_get_optional(varargs...) \
+ __devm_gpiod_get_optional(varargs, 0)
struct gpio_desc *__must_check
-devm_gpiod_get_index_optional(struct device *dev, const char *con_id,
- unsigned int index);
+__devm_gpiod_get_index_optional(struct device *dev, const char *con_id,
+ unsigned int index, enum gpiod_flags flags);
+#define __devm_gpiod_get_index_optional(dev, con_id, index, flags, ...) \
+ __devm_gpiod_get_index_optional(dev, con_id, index, flags)
+#define devm_gpiod_get_index_optional(varargs...) \
+ __devm_gpiod_get_index_optional(varargs, 0)
void devm_gpiod_put(struct device *dev, struct gpio_desc *desc);
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index 573e4f3243d0..e78a2373e374 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -141,73 +141,16 @@ extern const char *gpiochip_is_requested(struct gpio_chip *chip,
/* add/remove chips */
extern int gpiochip_add(struct gpio_chip *chip);
-extern int __must_check gpiochip_remove(struct gpio_chip *chip);
+extern int gpiochip_remove(struct gpio_chip *chip);
extern struct gpio_chip *gpiochip_find(void *data,
int (*match)(struct gpio_chip *chip, void *data));
/* lock/unlock as IRQ */
-int gpiod_lock_as_irq(struct gpio_desc *desc);
-void gpiod_unlock_as_irq(struct gpio_desc *desc);
+int gpio_lock_as_irq(struct gpio_chip *chip, unsigned int offset);
+void gpio_unlock_as_irq(struct gpio_chip *chip, unsigned int offset);
struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc);
-struct gpio_desc *gpiochip_get_desc(struct gpio_chip *chip,
- u16 hwnum);
-
-enum gpio_lookup_flags {
- GPIO_ACTIVE_HIGH = (0 << 0),
- GPIO_ACTIVE_LOW = (1 << 0),
- GPIO_OPEN_DRAIN = (1 << 1),
- GPIO_OPEN_SOURCE = (1 << 2),
-};
-
-/**
- * struct gpiod_lookup - lookup table
- * @chip_label: name of the chip the GPIO belongs to
- * @chip_hwnum: hardware number (i.e. relative to the chip) of the GPIO
- * @con_id: name of the GPIO from the device's point of view
- * @idx: index of the GPIO in case several GPIOs share the same name
- * @flags: mask of GPIO_* values
- *
- * gpiod_lookup is a lookup table for associating GPIOs to specific devices and
- * functions using platform data.
- */
-struct gpiod_lookup {
- const char *chip_label;
- u16 chip_hwnum;
- const char *con_id;
- unsigned int idx;
- enum gpio_lookup_flags flags;
-};
-
-struct gpiod_lookup_table {
- struct list_head list;
- const char *dev_id;
- struct gpiod_lookup table[];
-};
-
-/*
- * Simple definition of a single GPIO under a con_id
- */
-#define GPIO_LOOKUP(_chip_label, _chip_hwnum, _con_id, _flags) \
- GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _con_id, 0, _flags)
-
-/*
- * Use this macro if you need to have several GPIOs under the same con_id.
- * Each GPIO needs to use a different index and can be accessed using
- * gpiod_get_index()
- */
-#define GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _con_id, _idx, _flags) \
-{ \
- .chip_label = _chip_label, \
- .chip_hwnum = _chip_hwnum, \
- .con_id = _con_id, \
- .idx = _idx, \
- .flags = _flags, \
-}
-
-void gpiod_add_lookup_table(struct gpiod_lookup_table *table);
-
#ifdef CONFIG_GPIOLIB_IRQCHIP
void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,
@@ -223,6 +166,9 @@ int gpiochip_irqchip_add(struct gpio_chip *gpiochip,
#endif /* CONFIG_GPIO_IRQCHIP */
+int gpiochip_request_own_desc(struct gpio_desc *desc, const char *label);
+void gpiochip_free_own_desc(struct gpio_desc *desc);
+
#else /* CONFIG_GPIOLIB */
static inline struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc)
diff --git a/include/linux/gpio/machine.h b/include/linux/gpio/machine.h
new file mode 100644
index 000000000000..e2706140eaff
--- /dev/null
+++ b/include/linux/gpio/machine.h
@@ -0,0 +1,61 @@
+#ifndef __LINUX_GPIO_MACHINE_H
+#define __LINUX_GPIO_MACHINE_H
+
+#include <linux/types.h>
+#include <linux/list.h>
+
+enum gpio_lookup_flags {
+ GPIO_ACTIVE_HIGH = (0 << 0),
+ GPIO_ACTIVE_LOW = (1 << 0),
+ GPIO_OPEN_DRAIN = (1 << 1),
+ GPIO_OPEN_SOURCE = (1 << 2),
+};
+
+/**
+ * struct gpiod_lookup - lookup table
+ * @chip_label: name of the chip the GPIO belongs to
+ * @chip_hwnum: hardware number (i.e. relative to the chip) of the GPIO
+ * @con_id: name of the GPIO from the device's point of view
+ * @idx: index of the GPIO in case several GPIOs share the same name
+ * @flags: mask of GPIO_* values
+ *
+ * gpiod_lookup is a lookup table for associating GPIOs to specific devices and
+ * functions using platform data.
+ */
+struct gpiod_lookup {
+ const char *chip_label;
+ u16 chip_hwnum;
+ const char *con_id;
+ unsigned int idx;
+ enum gpio_lookup_flags flags;
+};
+
+struct gpiod_lookup_table {
+ struct list_head list;
+ const char *dev_id;
+ struct gpiod_lookup table[];
+};
+
+/*
+ * Simple definition of a single GPIO under a con_id
+ */
+#define GPIO_LOOKUP(_chip_label, _chip_hwnum, _con_id, _flags) \
+ GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _con_id, 0, _flags)
+
+/*
+ * Use this macro if you need to have several GPIOs under the same con_id.
+ * Each GPIO needs to use a different index and can be accessed using
+ * gpiod_get_index()
+ */
+#define GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _con_id, _idx, _flags) \
+{ \
+ .chip_label = _chip_label, \
+ .chip_hwnum = _chip_hwnum, \
+ .con_id = _con_id, \
+ .idx = _idx, \
+ .flags = _flags, \
+}
+
+void gpiod_add_lookup_table(struct gpiod_lookup_table *table);
+
+#endif /* __LINUX_GPIO_MACHINE_H */