forked from Minki/linux
48a1d032c9
Some LED devices support flash/torch functionality through the LED subsystem. This patch enables direct LED trigger controls by the driver. Flash on/off and torch on/off can be done simply by other driver space. Two trigger APIs are added, ledtrig_flash_ctrl() and ledtrig_torch_ctrl(). Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
/*
|
|
* Camera Flash and Torch On/Off Trigger
|
|
*
|
|
* based on ledtrig-ide-disk.c
|
|
*
|
|
* Copyright 2013 Texas Instruments
|
|
*
|
|
* Author: Milo(Woogyom) Kim <milo.kim@ti.com>
|
|
*
|
|
* 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>
|
|
|
|
DEFINE_LED_TRIGGER(ledtrig_flash);
|
|
DEFINE_LED_TRIGGER(ledtrig_torch);
|
|
|
|
void ledtrig_flash_ctrl(bool on)
|
|
{
|
|
enum led_brightness brt = on ? LED_FULL : LED_OFF;
|
|
|
|
led_trigger_event(ledtrig_flash, brt);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ledtrig_flash_ctrl);
|
|
|
|
void ledtrig_torch_ctrl(bool on)
|
|
{
|
|
enum led_brightness brt = on ? LED_FULL : LED_OFF;
|
|
|
|
led_trigger_event(ledtrig_torch, brt);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ledtrig_torch_ctrl);
|
|
|
|
static int __init ledtrig_camera_init(void)
|
|
{
|
|
led_trigger_register_simple("flash", &ledtrig_flash);
|
|
led_trigger_register_simple("torch", &ledtrig_torch);
|
|
return 0;
|
|
}
|
|
module_init(ledtrig_camera_init);
|
|
|
|
static void __exit ledtrig_camera_exit(void)
|
|
{
|
|
led_trigger_unregister_simple(ledtrig_torch);
|
|
led_trigger_unregister_simple(ledtrig_flash);
|
|
}
|
|
module_exit(ledtrig_camera_exit);
|
|
|
|
MODULE_DESCRIPTION("LED Trigger for Camera Flash/Torch Control");
|
|
MODULE_AUTHOR("Milo Kim");
|
|
MODULE_LICENSE("GPL");
|