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Commit 060856c7 authored by Nick Forbes's avatar Nick Forbes Committed by Richard Purdie
Browse files

leds: Add default-on trigger 



Add a trigger which allows LEDs to default to the full
brightness state.

Signed-off-by: default avatarNick Forbes <Nick.Forbes@huntsworth.com>
Signed-off-by: default avatarRichard Purdie <rpurdie@rpsys.net>
parent 2e214e0f

drivers/leds/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -183,4 +183,11 @@ config LEDS_TRIGGER_HEARTBEAT 
	  load average.

	  If unsure, say Y.



config LEDS_TRIGGER_DEFAULT_ON

	tristate "LED Default ON Trigger"

	depends on LEDS_TRIGGERS

	help

	  This allows LEDs to be initialised in the ON state.

	  If unsure, say Y.



endif # NEW_LEDS

drivers/leds/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -26,3 +26,4 @@ obj-$(CONFIG_LEDS_FSG) += leds-fsg.o 
obj-$(CONFIG_LEDS_TRIGGER_TIMER)	+= ledtrig-timer.o

obj-$(CONFIG_LEDS_TRIGGER_IDE_DISK)	+= ledtrig-ide-disk.o

obj-$(CONFIG_LEDS_TRIGGER_HEARTBEAT)	+= ledtrig-heartbeat.o

obj-$(CONFIG_LEDS_TRIGGER_DEFAULT_ON)	+= ledtrig-default-on.o

drivers/leds/ledtrig-default-on.c

0 → 100644
+45 −0
Original line number Diff line number Diff line 
/*

 * LED Kernel Default ON Trigger

 *

 * Copyright 2008 Nick Forbes <nick.forbes@incepta.com>

 *

 * Based on Richard Purdie's ledtrig-timer.c.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 */



#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/leds.h>

#include "leds.h"



static void defon_trig_activate(struct led_classdev *led_cdev)

{

	led_set_brightness(led_cdev, LED_FULL);

}



static struct led_trigger defon_led_trigger = {

	.name     = "default-on",

	.activate = defon_trig_activate,

};



static int __init defon_trig_init(void)

{

	return led_trigger_register(&defon_led_trigger);

}



static void __exit defon_trig_exit(void)

{

	led_trigger_unregister(&defon_led_trigger);

}



module_init(defon_trig_init);

module_exit(defon_trig_exit);



MODULE_AUTHOR("Nick Forbes <nick.forbes@incepta.com>");

MODULE_DESCRIPTION("Default-ON LED trigger");

MODULE_LICENSE("GPL");