1 /*
2  * Camera Flash and Torch On/Off Trigger
3  *
4  * based on ledtrig-ide-disk.c
5  *
6  * Copyright 2013 Texas Instruments
7  *
8  * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2 as
12  * published by the Free Software Foundation.
13  */
14 
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/init.h>
18 #include <linux/leds.h>
19 
20 DEFINE_LED_TRIGGER(ledtrig_flash);
21 DEFINE_LED_TRIGGER(ledtrig_torch);
22 
23 void ledtrig_flash_ctrl(bool on)
24 {
25 	enum led_brightness brt = on ? LED_FULL : LED_OFF;
26 
27 	led_trigger_event(ledtrig_flash, brt);
28 }
29 EXPORT_SYMBOL_GPL(ledtrig_flash_ctrl);
30 
31 void ledtrig_torch_ctrl(bool on)
32 {
33 	enum led_brightness brt = on ? LED_FULL : LED_OFF;
34 
35 	led_trigger_event(ledtrig_torch, brt);
36 }
37 EXPORT_SYMBOL_GPL(ledtrig_torch_ctrl);
38 
39 static int __init ledtrig_camera_init(void)
40 {
41 	led_trigger_register_simple("flash", &ledtrig_flash);
42 	led_trigger_register_simple("torch", &ledtrig_torch);
43 	return 0;
44 }
45 module_init(ledtrig_camera_init);
46 
47 static void __exit ledtrig_camera_exit(void)
48 {
49 	led_trigger_unregister_simple(ledtrig_torch);
50 	led_trigger_unregister_simple(ledtrig_flash);
51 }
52 module_exit(ledtrig_camera_exit);
53 
54 MODULE_DESCRIPTION("LED Trigger for Camera Flash/Torch Control");
55 MODULE_AUTHOR("Milo Kim");
56 MODULE_LICENSE("GPL v2");
57