Simon Glass 3669e0e759 dm: gpio: Add better functions to request GPIOs ...

At present U-Boot sort-of supports the standard way of reading GPIOs from
device tree nodes, but the support is incomplete, a bit clunky and only
works for GPIO bindings where #gpio-cells is 2.

Add new functions to request GPIOs, taking full account of the device
tree binding. These permit requesting a GPIO with a simple call like:

   gpio_request_by_name(dev, "cd-gpios", 0, &desc, GPIOD_IS_IN);

This will request the GPIO, looking at the device's node which might be
this, for example:

   cd-gpios = <&gpio TEGRA_GPIO(B, 3) GPIO_ACTIVE_LOW>;

The GPIO will be set to input mode in this case and polarity will be
honoured by the GPIO calls.

It is also possible to request and free a list of GPIOs.

Signed-off-by: Simon Glass <sjg@chromium.org>

2015-01-29 17:09:51 -07:00

..

adi_gpio2.c

blackfin: Move machine specific gpio_port_t structure back to blackfin arch folder.

2013-11-04 16:50:46 +08:00

altera_pio.c

Add GPL-2.0+ SPDX-License-Identifier to source files

2013-07-24 09:44:38 -04:00

at91_gpio.c

dm: at91: Add driver model support for atmel GPIO driver

2014-11-21 08:08:19 +01:00

bcm2835_gpio.c

dm: gpio: rpi_b: Drop request()/free() in the driver

2014-10-23 19:30:51 -06:00

da8xx_gpio.c

Add GPL-2.0+ SPDX-License-Identifier to source files

2013-07-24 09:44:38 -04:00

db8500_gpio.c

snowball: Add support for ux500 based snowball board

2012-09-01 14:58:19 +02:00

gpio-uclass.c

dm: gpio: Add better functions to request GPIOs

2015-01-29 17:09:51 -07:00

intel_ich6_gpio.c

x86: ich6-gpio: Add Intel Tunnel Creek GPIO support

2014-12-18 17:26:06 -07:00

Kconfig

dm: add entries to Kconfig

2014-10-23 21:43:09 -06:00

kona_gpio.c

gpio: kona: Add Kona gpio driver

2014-02-22 19:30:27 +01:00

kw_gpio.c

gpio: make local functions static

2014-10-25 07:02:01 -04:00

Makefile

Merge branch 'u-boot-sunxi/master' into 'u-boot-arm/master'

2014-07-28 10:12:45 +02:00

mpc83xx_gpio.c

Add GPL-2.0+ SPDX-License-Identifier to source files

2013-07-24 09:44:38 -04:00

mvgpio.c

Add GPL-2.0+ SPDX-License-Identifier to source files

2013-07-24 09:44:38 -04:00

mvgpio.h

Add GPL-2.0+ SPDX-License-Identifier to source files

2013-07-24 09:44:38 -04:00

mvmfp.c

Add GPL-2.0+ SPDX-License-Identifier to source files

2013-07-24 09:44:38 -04:00

mxc_gpio.c

dm: gpio: imx: Drop request()/free() in the driver

2014-10-23 19:30:51 -06:00

mxs_gpio.c

mxs_gpio: fix the handling in gpio_direction_output()

2013-11-13 10:09:09 +01:00

omap_gpio.c

dm: gpio: omap3: Drop request()/free() in the driver

2014-10-23 19:30:50 -06:00

pca953x.c

gpio: pca953x: Use ARRAY_SIZE instead of reinventing it

2013-08-16 13:45:15 -04:00

pca9698.c

Add GPL-2.0+ SPDX-License-Identifier to source files

2013-07-24 09:44:38 -04:00

s3c2440_gpio.c

Add GPL-2.0+ SPDX-License-Identifier to source files

2013-07-24 09:44:38 -04:00

s5p_gpio.c

dm: gpio: exynos: Drop request()/free() in the driver

2014-10-23 19:30:51 -06:00

sandbox.c

dm: gpio: Add better functions to request GPIOs

2015-01-29 17:09:51 -07:00

sh_pfc.c

sh: Add support pin function control using GPIO

2012-08-08 10:24:41 +09:00

spear_gpio.c

gpio: spear_gpio: Fix gpio_set_value() implementation

2014-07-04 21:37:29 +02:00

sunxi_gpio.c

sunxi: gpio: Add support for gpio pins on the AXP209 pmic

2015-01-14 14:56:38 +01:00

sx151x.c

Add support for SX151x SPI GPIO Expanders

2013-11-08 09:39:13 -05:00

tca642x.c

gpio: tca642x: Add the tca642x gpio expander driver

2013-07-30 09:21:42 -04:00

tegra_gpio.c

dm: gpio: tegra: Drop request()/free() in the driver

2014-10-23 19:29:53 -06:00

xilinx_gpio.c

Add GPL-2.0+ SPDX-License-Identifier to source files

2013-07-24 09:44:38 -04:00