u-boot.git/include/asm-generic/gpio.h, branch v2017.09

dm: gpio: Add live tree support

2017-06-01T13:03:10+00:00

Add support for requesting GPIOs with a live device tree.

This involves adjusting the function signature for the legacy function
gpio_request_by_name_nodev(), so fix up all callers.

Signed-off-by: Simon Glass 
Fixes to stm32f746-disco.c:
Signed-off-by: Tom Rini

dm: gpio: Drop blank line in gpio_xlate_offs_flags() comment

2017-06-01T13:03:10+00:00

This is not needed. Drop it.

Signed-off-by: Simon Glass

dm: gpio: Refactor to prepare for live tree support

2017-06-01T13:03:10+00:00

Move the main part of the GPIO request function into a separate function
so that it can be used by the live tree function when added. Update the
xlate method to use a node reference.

Update all GPIO drivers to handle the modified xlate() method.

Signed-off-by: Simon Glass

dm: gpio: Add methods for open drain setting

2016-06-04T05:13:52+00:00

Certain GPIO devices have the capability to switch their GPIOs into
open-drain mode, that is, instead of actively driving the output
(Push-pull output), the pin is connected to the collector (for a NPN
transistor) or the drain (for a MOSFET) of a transistor, respectively.
The pin then either forms an open circuit or a connection to ground,
depending on the state of the transistor.

This patch adds functions to the GPIO uclass to switch GPIOs to
open-drain mode on devices that support it.

Signed-off-by: Mario Six 
Reviewed-by: Simon Glass 
Reviewed-by: York Sun

dm: gpio: add a default gpio xlate routine

2016-05-17T15:54:43+00:00

Many drivers use a common form of offset + flags for device
tree nodes. e.g.:
	<&gpio1 2 GPIO_ACTIVE_LOW>

This patch adds a common implementation of this type of parsing
and calls it when a gpio driver doesn't supply its' own xlate
routine.

This will allow removal of the driver-specific versions in a
handful of drivers and simplify the addition of new drivers.

Signed-off-by: Eric Nelson 
Reviewed-by: Stephen Warren 
Acked-by: Simon Glass

gpio: Use const where possible

2016-03-17T02:27:22+00:00

Some functions do not change the struct gpio_desc parameter. Update these to
use const so this is clear.

Signed-off-by: Simon Glass 
Reviewed-by: Bin Meng

gpio: Add a function to obtain a GPIO vector value

2016-03-17T02:27:22+00:00

We can use GPIOs as binary digits for reading 'strapping' values. Each GPIO
is assigned a single bit and can be set high or low on the circuit board. We
already have a legacy function for reading these values. Add one that
supports driver model.

Signed-off-by: Simon Glass 
Reviewed-by: Bin Meng

dm: gpio: Add dm_gpio_request() to manually request a GPIO

2015-07-21T23:39:23+00:00

This function can be used for testing to manually request a GPIO for use,
without resorting to the legacy GPIO API.

Signed-off-by: Simon Glass

dm: gpio: Add dm_gpio_lookup_name() to look up a GPIO name

2015-07-21T23:39:23+00:00

Provide a driver-model function to look up a GPIO name. Make the standard
function use it.

Signed-off-by: Simon Glass

gpio: fix typos in GPIO header

2015-06-04T09:38:05+00:00

Signed-off-by: Masahiro Yamada