u-boot.git/drivers/misc/gpio_led.c, branch v2016.09

add generic stubs for GPIO LEDs

2015-10-23T16:15:28+00:00

For boards that support LEDs driven via GPIO (CONFIG_GPIO_LED),
it may be useful to have some generic stubs (wrapper functions)
for the "colored" LEDs.

This allows defining STATUS_LED_* values directly to GPIO numbers,
e.g.: #define STATUS_LED_GREEN	248 /* = PH24 */

To keep those optional, it's probably best to introduce an additional
configuration setting. I've chosen CONFIG_GPIO_LED_STUBS for that.
Placing the code in drivers/misc/gpio_led.c also ensures that it
automatically depends on CONFIG_GPIO_LED too.

Signed-off-by: Bernhard Nortmann 
Reviewed-by: Simon Glass

gpio_led: add support for inverted polarity

2013-11-25T15:41:52+00:00

Some GPIO connected LEDs have inverted polarity.
Introduce new config option: CONFIG_GPIO_LED_INVERTED_TABLE for the
specifying the inverted GPIO LEDs list and add support for this in the
gpio_led driver.

Signed-off-by: Igor Grinberg 
Tested-by: Ilya Ledvich

gpio_led: check gpio_request() return value

2013-11-25T15:41:52+00:00

Add a check for the gpio_request() function return value and do not try
to configure the GPIO if the gpio_request() call fails.
Also, print an error message indicating the gpio_request() has failed.

Signed-off-by: Igor Grinberg 
Tested-by: Ilya Ledvich

gpio_led: add gpio_request to __led_init

2010-07-12T15:30:52+00:00

This patch adds the gpio usage request. The polarity is changed to
positive as suggested by Mike Frysinger.

Signed-off-by: Thomas Chou 
Signed-off-by: Scott McNutt

misc: add gpio based status led driver

2010-05-28T14:56:03+00:00

This patch adds a status led driver followed the GPIO access
conventions of Linux. The led mask is used to specify the gpio pin.

Signed-off-by: Thomas Chou 
Tested-by: Ian Abbott 
Signed-off-by: Scott McNutt