| 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 | |
| 17 | DEFINE_LED_TRIGGER(ledtrig_flash); |
| 18 | DEFINE_LED_TRIGGER(ledtrig_torch); |
| 19 | |
| 20 | void ledtrig_flash_ctrl(bool on) |
| 21 | { |
| 22 | enum led_brightness brt = on ? LED_FULL : LED_OFF; |
| 23 | |
| 24 | led_trigger_event(trigger: ledtrig_flash, event: brt); |
| 25 | } |
| 26 | EXPORT_SYMBOL_GPL(ledtrig_flash_ctrl); |
| 27 | |
| 28 | void ledtrig_torch_ctrl(bool on) |
| 29 | { |
| 30 | enum led_brightness brt = on ? LED_FULL : LED_OFF; |
| 31 | |
| 32 | led_trigger_event(trigger: ledtrig_torch, event: brt); |
| 33 | } |
| 34 | EXPORT_SYMBOL_GPL(ledtrig_torch_ctrl); |
| 35 | |
| 36 | static int __init ledtrig_camera_init(void) |
| 37 | { |
| 38 | led_trigger_register_simple(name: "flash", trigger: &ledtrig_flash); |
| 39 | led_trigger_register_simple(name: "torch", trigger: &ledtrig_torch); |
| 40 | return 0; |
| 41 | } |
| 42 | module_init(ledtrig_camera_init); |
| 43 | |
| 44 | static void __exit ledtrig_camera_exit(void) |
| 45 | { |
| 46 | led_trigger_unregister_simple(trigger: ledtrig_torch); |
| 47 | led_trigger_unregister_simple(trigger: ledtrig_flash); |
| 48 | } |
| 49 | module_exit(ledtrig_camera_exit); |
| 50 | |
| 51 | MODULE_DESCRIPTION("LED Trigger for Camera Flash/Torch Control"); |
| 52 | MODULE_AUTHOR("Milo Kim"); |
| 53 | MODULE_LICENSE("GPL v2"); |
| 54 |