Merge tag 'gpio-v4.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "This is the bulk of GPIO changes for kernel cycle v4.7:

  Core infrastructural changes:

   - Support for natively single-ended GPIO driver stages.

     This means that if the hardware has registers to configure open
     drain or open source configuration, we use that rather than (as we
     did before) try to emulate it by switching the line to an input to
     get high impedance.

     This is also documented throughly in Documentation/gpio/driver.txt
     for those of you who did not understand one word of what I just
     wrote.

   - Start to do away with the unnecessarily complex and unitelligible
     ARCH_REQUIRE_GPIOLIB and ARCH_WANT_OPTIONAL_GPIOLIB, another
     evolutional artifact from the time when the GPIO subsystem was
     unmaintained.

     Archs can now just select GPIOLIB and be done with it, cleanups to
     arches will trickle in for the next kernel.  Some minor archs ACKed
     the changes immediately so these are included in this pull request.

   - Advancing the use of the data pointer inside the GPIO device for
     storing driver data by switching the PowerPC, Super-H Unicore and
     a few other subarches or subsystem drivers in ALSA SoC, Input,
     serial, SSB, staging etc to use it.

   - The initialization now reads the input/output state of the GPIO
     lines, so that each GPIO descriptor knows - if this callback is
     implemented - whether the line is input or output.  This also
     reflects nicely in userspace "lsgpio".

   - It is now possible to name GPIO producer names, line names, from
     the device tree.  (Platform data has been supported for a while).
     I bet we will get a similar mechanism for ACPI one of those days.
     This makes is possible to get sensible producer names for e.g.
     GPIO rails in "lsgpio" in userspace.

  New drivers:

   - New driver for the Loongson1.

   - The XLP driver now supports Broadcom Vulcan ARM64.

   - The IT87 driver now supports IT8620 and IT8628.

   - The PCA953X driver now supports Galileo Gen2.

  Driver improvements:

   - MCP23S08 was switched to use the gpiolib irqchip helpers and now
     also suppors level-triggered interrupts.

   - 74x164 and RCAR now supports the .set_multiple() callback

   - AMDPT was converted to use generic GPIO.

   - TC3589x, TPS65218, SX150X, F7188X, MENZ127, VX855, WM831X, WM8994
     support the new single ended callback for open drain and in some
     cases open source.

   - Implement the .get_direction() callback for a few more drivers like
     PL061, Xgene.

  Cleanups:

   - Paul Gortmaker combed through the drivers and de-modularized those
     who are not really modules.

   - Move the GPIO poweroff DT bindings to the power subdir where they
     belong.

   - Rename gpio-generic.c to gpio-mmio.c, which is much more to the
     point.  That's what it is handling, nothing more, nothing less"

* tag 'gpio-v4.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (126 commits)
  MIPS: do away with ARCH_[WANT_OPTIONAL|REQUIRE]_GPIOLIB
  gpio: zevio: make it explicitly non-modular
  gpio: timberdale: make it explicitly non-modular
  gpio: stmpe: make it explicitly non-modular
  gpio: sodaville: make it explicitly non-modular
  pinctrl: sh-pfc: Let gpio_chip.to_irq() return zero on error
  gpio: dwapb: Add ACPI device ID for DWAPB GPIO controller on X-Gene platforms
  gpio: dt-bindings: add wd,mbl-gpio bindings
  gpio: of: make it possible to name GPIO lines
  gpio: make gpiod_to_irq() return negative for NO_IRQ
  gpio: xgene: implement .get_direction()
  gpio: xgene: Enable ACPI support for X-Gene GFC GPIO driver
  gpio: tegra: Implement gpio_get_direction callback
  gpio: set up initial state from .get_direction()
  gpio: rename gpio-generic.c into gpio-mmio.c
  gpio: generic: fix GPIO_GENERIC_PLATFORM is set to module case
  gpio: dwapb: add gpio-signaled acpi event support
  gpio: dwapb: convert device node to fwnode
  gpio: dwapb: remove name from dwapb_port_property
  gpio/qoriq: select IRQ_DOMAIN
  ...

1 files changed, 15 insertions, 108 deletions

diff --git a/drivers/gpio/gpio-amdpt.c b/drivers/gpio/gpio-amdpt.c
index c2484046e8e9..9b78dc837603 100644
--- a/drivers/gpio/gpio-amdpt.c
+++ b/drivers/gpio/gpio-amdpt.c
@@ -28,7 +28,6 @@
 struct pt_gpio_chip {
 	struct gpio_chip         gc;
 	void __iomem             *reg_base;
-	spinlock_t               lock;
 };
 
 static int pt_gpio_request(struct gpio_chip *gc, unsigned offset)
@@ -39,19 +38,19 @@ static int pt_gpio_request(struct gpio_chip *gc, unsigned offset)
 
 	dev_dbg(gc->parent, "pt_gpio_request offset=%x\n", offset);
 
-	spin_lock_irqsave(&pt_gpio->lock, flags);
+	spin_lock_irqsave(&gc->bgpio_lock, flags);
 
 	using_pins = readl(pt_gpio->reg_base + PT_SYNC_REG);
 	if (using_pins & BIT(offset)) {
 		dev_warn(gc->parent, "PT GPIO pin %x reconfigured\n",
 			 offset);
-		spin_unlock_irqrestore(&pt_gpio->lock, flags);
+		spin_unlock_irqrestore(&gc->bgpio_lock, flags);
 		return -EINVAL;
 	}
 
 	writel(using_pins | BIT(offset), pt_gpio->reg_base + PT_SYNC_REG);
 
-	spin_unlock_irqrestore(&pt_gpio->lock, flags);
+	spin_unlock_irqrestore(&gc->bgpio_lock, flags);
 
 	return 0;
 }
@@ -62,111 +61,17 @@ static void pt_gpio_free(struct gpio_chip *gc, unsigned offset)
 	unsigned long flags;
 	u32 using_pins;
 
-	spin_lock_irqsave(&pt_gpio->lock, flags);
+	spin_lock_irqsave(&gc->bgpio_lock, flags);
 
 	using_pins = readl(pt_gpio->reg_base + PT_SYNC_REG);
 	using_pins &= ~BIT(offset);
 	writel(using_pins, pt_gpio->reg_base + PT_SYNC_REG);
 
-	spin_unlock_irqrestore(&pt_gpio->lock, flags);
+	spin_unlock_irqrestore(&gc->bgpio_lock, flags);
 
 	dev_dbg(gc->parent, "pt_gpio_free offset=%x\n", offset);
 }
 
-static void pt_gpio_set_value(struct gpio_chip *gc, unsigned offset, int value)
-{
-	struct pt_gpio_chip *pt_gpio = gpiochip_get_data(gc);
-	unsigned long flags;
-	u32 data;
-
-	dev_dbg(gc->parent, "pt_gpio_set_value offset=%x, value=%x\n",
-		offset, value);
-
-	spin_lock_irqsave(&pt_gpio->lock, flags);
-
-	data = readl(pt_gpio->reg_base + PT_OUTPUTDATA_REG);
-	data &= ~BIT(offset);
-	if (value)
-		data |= BIT(offset);
-	writel(data, pt_gpio->reg_base + PT_OUTPUTDATA_REG);
-
-	spin_unlock_irqrestore(&pt_gpio->lock, flags);
-}
-
-static int pt_gpio_get_value(struct gpio_chip *gc, unsigned offset)
-{
-	struct pt_gpio_chip *pt_gpio = gpiochip_get_data(gc);
-	unsigned long flags;
-	u32 data;
-
-	spin_lock_irqsave(&pt_gpio->lock, flags);
-
-	data = readl(pt_gpio->reg_base + PT_DIRECTION_REG);
-
-	/* configure as output */
-	if (data & BIT(offset))
-		data = readl(pt_gpio->reg_base + PT_OUTPUTDATA_REG);
-	else	/* configure as input */
-		data = readl(pt_gpio->reg_base + PT_INPUTDATA_REG);
-
-	spin_unlock_irqrestore(&pt_gpio->lock, flags);
-
-	data >>= offset;
-	data &= 1;
-
-	dev_dbg(gc->parent, "pt_gpio_get_value offset=%x, value=%x\n",
-		offset, data);
-
-	return data;
-}
-
-static int pt_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
-{
-	struct pt_gpio_chip *pt_gpio = gpiochip_get_data(gc);
-	unsigned long flags;
-	u32 data;
-
-	dev_dbg(gc->parent, "pt_gpio_dirction_input offset=%x\n", offset);
-
-	spin_lock_irqsave(&pt_gpio->lock, flags);
-
-	data = readl(pt_gpio->reg_base + PT_DIRECTION_REG);
-	data &= ~BIT(offset);
-	writel(data, pt_gpio->reg_base + PT_DIRECTION_REG);
-
-	spin_unlock_irqrestore(&pt_gpio->lock, flags);
-
-	return 0;
-}
-
-static int pt_gpio_direction_output(struct gpio_chip *gc,
-					unsigned offset, int value)
-{
-	struct pt_gpio_chip *pt_gpio = gpiochip_get_data(gc);
-	unsigned long flags;
-	u32 data;
-
-	dev_dbg(gc->parent, "pt_gpio_direction_output offset=%x, value=%x\n",
-		offset, value);
-
-	spin_lock_irqsave(&pt_gpio->lock, flags);
-
-	data = readl(pt_gpio->reg_base + PT_OUTPUTDATA_REG);
-	if (value)
-		data |= BIT(offset);
-	else
-		data &= ~BIT(offset);
-	writel(data, pt_gpio->reg_base + PT_OUTPUTDATA_REG);
-
-	data = readl(pt_gpio->reg_base + PT_DIRECTION_REG);
-	data |= BIT(offset);
-	writel(data, pt_gpio->reg_base + PT_DIRECTION_REG);
-
-	spin_unlock_irqrestore(&pt_gpio->lock, flags);
-
-	return 0;
-}
-
 static int pt_gpio_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -196,18 +101,19 @@ static int pt_gpio_probe(struct platform_device *pdev)
 		return PTR_ERR(pt_gpio->reg_base);
 	}
 
-	spin_lock_init(&pt_gpio->lock);
+	ret = bgpio_init(&pt_gpio->gc, dev, 4,
+			 pt_gpio->reg_base + PT_INPUTDATA_REG,
+			 pt_gpio->reg_base + PT_OUTPUTDATA_REG, NULL,
+			 pt_gpio->reg_base + PT_DIRECTION_REG, NULL,
+			 BGPIOF_READ_OUTPUT_REG_SET);
+	if (ret) {
+		dev_err(&pdev->dev, "bgpio_init failed\n");
+		return ret;
+	}
 
-	pt_gpio->gc.label            = pdev->name;
 	pt_gpio->gc.owner            = THIS_MODULE;
-	pt_gpio->gc.parent              = dev;
 	pt_gpio->gc.request          = pt_gpio_request;
 	pt_gpio->gc.free             = pt_gpio_free;
-	pt_gpio->gc.direction_input  = pt_gpio_direction_input;
-	pt_gpio->gc.direction_output = pt_gpio_direction_output;
-	pt_gpio->gc.get              = pt_gpio_get_value;
-	pt_gpio->gc.set              = pt_gpio_set_value;
-	pt_gpio->gc.base             = -1;
 	pt_gpio->gc.ngpio            = PT_TOTAL_GPIO;
 #if defined(CONFIG_OF_GPIO)
 	pt_gpio->gc.of_node          = pdev->dev.of_node;
@@ -239,6 +145,7 @@ static int pt_gpio_remove(struct platform_device *pdev)
 
 static const struct acpi_device_id pt_gpio_acpi_match[] = {
 	{ "AMDF030", 0 },
+	{ "AMDIF030", 0 },
 	{ },
 };
 MODULE_DEVICE_TABLE(acpi, pt_gpio_acpi_match);