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| author | Richard Purdie <rpurdie@rpsys.net> | 2006-03-31 02:31:04 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-31 12:18:56 -0800 |
| commit | c72a1d608dd0eb3d553a08bfdf1c0041bebaa8a0 (patch) | |
| tree | 56715f0e0af8a9c33725f3db2f14cf7f870ad46d /include | |
| parent | 75c1d31d9ea71025b73430c696b727e8aa15872d (diff) | |
| download | lwn-c72a1d608dd0eb3d553a08bfdf1c0041bebaa8a0.tar.gz lwn-c72a1d608dd0eb3d553a08bfdf1c0041bebaa8a0.zip | |
[PATCH] LED: add LED class
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/leds.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/include/linux/leds.h b/include/linux/leds.h new file mode 100644 index 000000000000..6812640b39cc --- /dev/null +++ b/include/linux/leds.h @@ -0,0 +1,51 @@ +/* + * Driver model for leds and led triggers + * + * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu> + * Copyright (C) 2005 Richard Purdie <rpurdie@openedhand.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ +#ifndef __LINUX_LEDS_H_INCLUDED +#define __LINUX_LEDS_H_INCLUDED + +struct device; +struct class_device; +/* + * LED Core + */ + +enum led_brightness { + LED_OFF = 0, + LED_HALF = 127, + LED_FULL = 255, +}; + +struct led_classdev { + const char *name; + int brightness; + int flags; +#define LED_SUSPENDED (1 << 0) + + /* A function to set the brightness of the led */ + void (*brightness_set)(struct led_classdev *led_cdev, + enum led_brightness brightness); + + struct class_device *class_dev; + /* LED Device linked list */ + struct list_head node; + + /* Trigger data */ + char *default_trigger; +}; + +extern int led_classdev_register(struct device *parent, + struct led_classdev *led_cdev); +extern void led_classdev_unregister(struct led_classdev *led_cdev); +extern void led_classdev_suspend(struct led_classdev *led_cdev); +extern void led_classdev_resume(struct led_classdev *led_cdev); + +#endif /* __LINUX_LEDS_H_INCLUDED */ |