LXR linux/drivers/leds/trigger/ledtrig-camera.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Camera Flash and Torch On/Off Trigger
   4 *
   5 * based on ledtrig-ide-disk.c
   6 *
   7 * Copyright 2013 Texas Instruments
   8 *
   9 * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
  10 */
  11
  12#include <linux/module.h>
  13#include <linux/kernel.h>
  14#include <linux/init.h>
  15#include <linux/leds.h>
  16
  17DEFINE_LED_TRIGGER(ledtrig_flash);
  18DEFINE_LED_TRIGGER(ledtrig_torch);
  19
  20void ledtrig_flash_ctrl(bool on)
  21{
  22        enum led_brightness brt = on ? LED_FULL : LED_OFF;
  23
  24        led_trigger_event(ledtrig_flash, brt);
  25}
  26EXPORT_SYMBOL_GPL(ledtrig_flash_ctrl);
  27
  28void ledtrig_torch_ctrl(bool on)
  29{
  30        enum led_brightness brt = on ? LED_FULL : LED_OFF;
  31
  32        led_trigger_event(ledtrig_torch, brt);
  33}
  34EXPORT_SYMBOL_GPL(ledtrig_torch_ctrl);
  35
  36static int __init ledtrig_camera_init(void)
  37{
  38        led_trigger_register_simple("flash", &ledtrig_flash);
  39        led_trigger_register_simple("torch", &ledtrig_torch);
  40        return 0;
  41}
  42module_init(ledtrig_camera_init);
  43
  44static void __exit ledtrig_camera_exit(void)
  45{
  46        led_trigger_unregister_simple(ledtrig_torch);
  47        led_trigger_unregister_simple(ledtrig_flash);
  48}
  49module_exit(ledtrig_camera_exit);
  50
  51MODULE_DESCRIPTION("LED Trigger for Camera Flash/Torch Control");
  52MODULE_AUTHOR("Milo Kim");
  53MODULE_LICENSE("GPL v2");
  54