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48a1d032c9
Some LED devices support flash/torch functionality through the LED subsystem. This patch enables direct LED trigger controls by the driver. Flash on/off and torch on/off can be done simply by other driver space. Two trigger APIs are added, ledtrig_flash_ctrl() and ledtrig_torch_ctrl(). Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
/*
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* Camera Flash and Torch On/Off Trigger
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*
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* based on ledtrig-ide-disk.c
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*
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* Copyright 2013 Texas Instruments
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*
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* Author: Milo(Woogyom) Kim <milo.kim@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/leds.h>
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DEFINE_LED_TRIGGER(ledtrig_flash);
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DEFINE_LED_TRIGGER(ledtrig_torch);
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void ledtrig_flash_ctrl(bool on)
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{
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enum led_brightness brt = on ? LED_FULL : LED_OFF;
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led_trigger_event(ledtrig_flash, brt);
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}
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EXPORT_SYMBOL_GPL(ledtrig_flash_ctrl);
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void ledtrig_torch_ctrl(bool on)
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{
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enum led_brightness brt = on ? LED_FULL : LED_OFF;
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led_trigger_event(ledtrig_torch, brt);
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}
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EXPORT_SYMBOL_GPL(ledtrig_torch_ctrl);
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static int __init ledtrig_camera_init(void)
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{
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led_trigger_register_simple("flash", &ledtrig_flash);
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led_trigger_register_simple("torch", &ledtrig_torch);
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return 0;
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}
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module_init(ledtrig_camera_init);
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static void __exit ledtrig_camera_exit(void)
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{
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led_trigger_unregister_simple(ledtrig_torch);
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led_trigger_unregister_simple(ledtrig_flash);
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}
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module_exit(ledtrig_camera_exit);
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MODULE_DESCRIPTION("LED Trigger for Camera Flash/Torch Control");
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MODULE_AUTHOR("Milo Kim");
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MODULE_LICENSE("GPL");
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