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