drivers/leds/trigger/ledtrig-camera.c

   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");