From 17354bfe85275f1bdde7f4a27ebc1ba53e053939 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Tue, 17 Feb 2009 13:18:11 +0200 Subject: leds: Add gpio-led trigger The gpio led trigger will allow leds to be triggered by gpio events. When we give the led a gpio number, the trigger will request_irq() on that so we don't have to keep polling for gpio state. It's useful for usecases as n810's keypad leds that could be triggered by the gpio event generated when user slides up to show the keypad. We also provide means for userland to tell us what is the desired brightness for that special led when it goes on so userland could use information from ambient light sensors and not set led brightness too high if it's not necessary. Signed-off-by: Felipe Balbi Signed-off-by: Richard Purdie --- drivers/leds/Kconfig | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'drivers/leds/Kconfig') diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index db5e6a64c7cf..9c131f30757c 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -255,6 +255,19 @@ config LEDS_TRIGGER_BACKLIGHT If unsure, say N. +config LEDS_TRIGGER_GPIO + tristate "LED GPIO Trigger" + depends on LEDS_TRIGGERS + depends on GPIOLIB + help + This allows LEDs to be controlled by gpio events. It's good + when using gpios as switches and triggering the needed LEDs + from there. One use case is n810's keypad LEDs that could + be triggered by this trigger when user slides up to show + keypad. + + If unsure, say N. + config LEDS_TRIGGER_DEFAULT_ON tristate "LED Default ON Trigger" depends on LEDS_TRIGGERS -- cgit v1.2.3