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* add generic stubs for GPIO LEDsBernhard Nortmann2015-10-23-0/+54
| | | | | | | | | | | | | | | | | 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 <bernhard.nortmann@web.de> Reviewed-by: Simon Glass <sjg@chromium.org>
* gpio_led: add support for inverted polarityIgor Grinberg2013-11-25-2/+25
| | | | | | | | | | 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 <grinberg@compulab.co.il> Tested-by: Ilya Ledvich <ilya@compulab.co.il>
* gpio_led: check gpio_request() return valueIgor Grinberg2013-11-25-1/+5
| | | | | | | | | 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 <grinberg@compulab.co.il> Tested-by: Ilya Ledvich <ilya@compulab.co.il>
* gpio_led: add gpio_request to __led_initThomas Chou2010-07-12-8/+4
| | | | | | | | This patch adds the gpio usage request. The polarity is changed to positive as suggested by Mike Frysinger. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Scott McNutt <smcnutt@psyent.com>
* misc: add gpio based status led driverThomas Chou2010-05-28-0/+30
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 <thomas@wytron.com.tw> Tested-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Scott McNutt <smcnutt@psyent.com>