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 
16 #include <linux/module.h>
17 #include <linux/kernel.h>
18 #include <linux/init.h>
19 #include <linux/leds.h>
20 
21 DEFINE_LED_TRIGGER(ledtrig_flash);
22 DEFINE_LED_TRIGGER(ledtrig_torch);
23 
24 void ledtrig_flash_ctrl(bool on)
25 {
26 	enum led_brightness brt = on ? LED_FULL : LED_OFF;
27 
28 	led_trigger_event(ledtrig_flash, brt);
29 }
30 EXPORT_SYMBOL_GPL(ledtrig_flash_ctrl);
31 
32 void ledtrig_torch_ctrl(bool on)
33 {
34 	enum led_brightness brt = on ? LED_FULL : LED_OFF;
35 
36 	led_trigger_event(ledtrig_torch, brt);
37 }
38 EXPORT_SYMBOL_GPL(ledtrig_torch_ctrl);
39 
40 static int __init ledtrig_camera_init(void)
41 {
42 	led_trigger_register_simple("flash", &ledtrig_flash);
43 	led_trigger_register_simple("torch", &ledtrig_torch);
44 	return 0;
45 }
46 module_init(ledtrig_camera_init);
47 
48 static void __exit ledtrig_camera_exit(void)
49 {
50 	led_trigger_unregister_simple(ledtrig_torch);
51 	led_trigger_unregister_simple(ledtrig_flash);
52 }
53 module_exit(ledtrig_camera_exit);
54 
55 MODULE_DESCRIPTION("LED Trigger for Camera Flash/Torch Control");
56 MODULE_AUTHOR("Milo Kim");
57 MODULE_LICENSE("GPL");
58