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kernel/linux-imx6_3.14.28/drivers/leds/trigger/ledtrig-camera.c 1.34 KB
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  /*
   * 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");