linux-toradex.git/include/linux/of_gpio.h, branch v4.4-rc6

gpiolib: Add and use OF_GPIO_SINGLE_ENDED flag

2015-10-16T20:49:26+00:00

The flag matches the DT GPIO_SINGLE_ENDED flag and allows drivers to
parse and use the DT flag to handle single-ended (open-drain or
open-source) GPIOs.

Signed-off-by: Laurent Pinchart 
Signed-off-by: Linus Walleij

gpio: defer probe if pinctrl cannot be found

2015-07-28T11:55:36+00:00

When an OF node has a pin range for its GPIOs, return -EPROBE_DEFER if
the pin controller isn't available.

Otherwise, the GPIO range wouldn't be set at all unless the pin
controller probed always before the GPIO chip.

With this change, the probe of the GPIO chip will be deferred and will
be retried at a later point, hopefully once the pin controller has been
registered and probed already.

Signed-off-by: Tomeu Vizoso 
Signed-off-by: Linus Walleij

gpio/gpiolib-of: Create of_mm_gpiochip_remove

2015-01-15T16:23:17+00:00

Create counterpart of of_mm_gpiochip_add(). This way the modules that
can be removable do not duplicate the cleanup code.

Suggested-by: Alexandre Courbot 
Signed-off-by: Ricardo Ribalda Delgado 
Signed-off-by: Linus Walleij

gpio: make of_get_named_gpiod_flags() private

2014-05-21T09:14:46+00:00

of_get_named_gpiod_flags() is visible and directly usable by GPIO
consumers, but it really should not as the gpiod interface relies
on the simpler gpiod_get() to provide properly-configured GPIOs.

of_get_named_gpiod_flags() is just used internally by gpiolib to
implement gpiod_get(), and by the old of_get_named_gpio_flags()
function, therefore it makes sense to make it gpiolib-private.

As a side-effect, the unused (and unneeded) of_get_gpiod_flags()
inline function is also removed, and of_get_named_gpio_flags() is moved
from a static inline function to a regular one in gpiolib-of.c

This results in all references to gpiod_* functions in of_gpio.h being
gone, which is the way it should be since this file is part of the old
integer GPIO interface.

Changes since v1:
- Fixed compilation error when CONFIG_OF_GPIO is not defined
- Fixed warning due to of_gpio_flags enum not being declared
  in private gpiolib.h header

Signed-off-by: Alexandre Courbot 
Signed-off-by: Linus Walleij

gpiolib: include gpio/consumer.h in of_gpio.h for desc_to_gpio()

2013-10-30T01:26:14+00:00

Fixes this build error on sparc:

In file included from drivers/spi/spi.c:33:0:
include/linux/of_gpio.h: In function 'of_get_named_gpio_flags':
include/linux/of_gpio.h:93:3: error: implicit declaration of function 'desc_to_gpio' [-Werror=implicit-function-declaration]

Signed-off-by: Stephen Rothwell 
Signed-off-by: Linus Walleij

gpiolib: port of_ functions to use gpiod

2013-10-19T21:24:52+00:00

Refactor the of_ functions of gpiolib to use the now public gpiod
interface, and export of_get_named_gpiod_flags() and
of_get_gpiod_flags() functions.

Signed-off-by: Alexandre Courbot 
Signed-off-by: Linus Walleij

gpio: Make of_count_named_gpios() use new of_count_phandle_with_args()

2013-02-13T10:11:53+00:00

This patch replaces the horribly coded of_count_named_gpios() with a
call to of_count_phandle_with_args() which is far more efficient. This
also changes the return value of of_gpio_count() & of_gpio_named_count()
from 'unsigned int' to 'int' so that it can return an error code. All
the users of that function are fixed up to correctly handle a negative
return value.

v2: Split GPIO portion into a separate patch

Tested-by: Andreas Larsson 
Signed-off-by: Grant Likely 
Cc: Linus Walleij 
Cc: Rob Herring

gpio: Adjust of_xlate API to support multiple GPIO chips

2012-05-18T22:48:36+00:00

This patch changes the of_xlate API to make it possible for multiple
gpio_chips to refer to the same device tree node.  This is useful for
banked GPIO controllers that use multiple gpio_chips for a single
device.  With this change the core code will try calling of_xlate on
each gpio_chip that references the device_node and will return the
gpio number for the first one to return 'true'.

Tested-by: Roland Stigge 
Acked-by: Arnd Bergmann 
Signed-off-by: Grant Likely

of_gpio: add support of of_gpio_named_count to be able to count named gpio

2012-02-06T06:08:30+00:00

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD 
Cc: devicetree-discuss@lists.ozlabs.org
Signed-off-by: Grant Likely

of: create of_phandle_args to simplify return of phandle parsing data

2011-12-12T20:40:16+00:00

of_parse_phandle_with_args() needs to return quite a bit of data.  Rather
than making each datum a separate **out_ argument, this patch creates
struct of_phandle_args to contain all the returned data and reworks the
user of the function.  This patch also enables of_parse_phandle_with_args()
to return the device node pointer for the phandle node.

This patch also ends up being fairly major surgery to
of_parse_handle_with_args().  The existing structure didn't work well
when extending to use of_phandle_args, and I discovered bugs during testing.
I also took the opportunity to rename the function to be like the
existing of_parse_phandle().

v2: - moved declaration of of_phandle_args to fix compile on non-DT builds
    - fixed incorrect index in example usage
    - fixed incorrect return code handling for empty entries

Reviewed-by: Shawn Guo 
Signed-off-by: Grant Likely