c72a1d608d
Add the foundations of a new LEDs subsystem. This patch adds a class which presents LED devices within sysfs and allows their brightness to be controlled. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
/*
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* Driver model for leds and led triggers
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*
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* Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu>
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* Copyright (C) 2005 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 __LINUX_LEDS_H_INCLUDED
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#define __LINUX_LEDS_H_INCLUDED
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struct device;
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struct class_device;
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/*
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* LED Core
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*/
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enum led_brightness {
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LED_OFF = 0,
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LED_HALF = 127,
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LED_FULL = 255,
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};
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struct led_classdev {
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const char *name;
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int brightness;
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int flags;
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#define LED_SUSPENDED (1 << 0)
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/* A function to set the brightness of the led */
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void (*brightness_set)(struct led_classdev *led_cdev,
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enum led_brightness brightness);
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struct class_device *class_dev;
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/* LED Device linked list */
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struct list_head node;
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/* Trigger data */
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char *default_trigger;
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};
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extern int led_classdev_register(struct device *parent,
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struct led_classdev *led_cdev);
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extern void led_classdev_unregister(struct led_classdev *led_cdev);
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extern void led_classdev_suspend(struct led_classdev *led_cdev);
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extern void led_classdev_resume(struct led_classdev *led_cdev);
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#endif /* __LINUX_LEDS_H_INCLUDED */
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