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leds: add camera LED triggers

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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>
This commit is contained in:
Kim, Milo 2013-03-14 04:29:24 -07:00 • committed by Bryan Wu
parent 39f7e08af3
commit 48a1d032c9
4 changed files with 74 additions and 0 deletions
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8
include/linux/leds.h
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@ -218,6 +218,14 @@ extern void ledtrig_ide_activity(void);
static inline void ledtrig_ide_activity(void) {}
#endif
#if defined(CONFIG_LEDS_TRIGGER_CAMERA) || defined(CONFIG_LEDS_TRIGGER_CAMERA_MODULE)
extern void ledtrig_flash_ctrl(bool on);
extern void ledtrig_torch_ctrl(bool on);
#else
static inline void ledtrig_flash_ctrl(bool on) {}
static inline void ledtrig_torch_ctrl(bool on) {}
#endif
/*
* Generic LED platform data for describing LED names and default triggers.
*/