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f745a93405
userspace can control all leds by one ioctl through file node: /dev/led_multi_ctrl. Change-Id: I10ac19b86b46b3dc9a88809f1be5ebc95398212c Signed-off-by: Wenping Zhang <wenping.zhang@rock-chips.com>
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
/*
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* LED Core
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*
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* Copyright 2005 Openedhand Ltd.
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*
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* Author: Richard Purdie <rpurdie@openedhand.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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#ifndef __LEDS_H_INCLUDED
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#define __LEDS_H_INCLUDED
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#include <linux/rwsem.h>
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#include <linux/leds.h>
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static inline void led_set_brightness_async(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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value = min(value, led_cdev->max_brightness);
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led_cdev->brightness = value;
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if (!(led_cdev->flags & LED_SUSPENDED))
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led_cdev->brightness_set(led_cdev, value);
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}
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static inline int led_set_brightness_sync(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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int ret = 0;
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led_cdev->brightness = min(value, led_cdev->max_brightness);
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if (!(led_cdev->flags & LED_SUSPENDED))
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ret = led_cdev->brightness_set_sync(led_cdev,
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led_cdev->brightness);
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return ret;
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}
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static inline int led_get_brightness(struct led_classdev *led_cdev)
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{
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return led_cdev->brightness;
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}
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void led_init_core(struct led_classdev *led_cdev);
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void led_stop_software_blink(struct led_classdev *led_cdev);
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extern struct rw_semaphore leds_list_lock;
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extern struct list_head leds_list;
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#ifdef CONFIG_LEDS_TRIGGER_MULTI_CTRL
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void led_trigger_set_by_name(struct led_classdev *led_cdev, char *trig_name);
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#else
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static inline void led_trigger_set_by_name(struct led_classdev *led_cdev,
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char *trig_name) {}
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#endif
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#endif /* __LEDS_H_INCLUDED */
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