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authorRichard Purdie <rpurdie@rpsys.net>2006-03-31 02:31:04 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-31 12:18:56 -0800
commitc72a1d608dd0eb3d553a08bfdf1c0041bebaa8a0 (patch)
tree56715f0e0af8a9c33725f3db2f14cf7f870ad46d /include/linux/leds.h
parent75c1d31d9ea71025b73430c696b727e8aa15872d (diff)
downloadlinux-linaro-c72a1d608dd0eb3d553a08bfdf1c0041bebaa8a0.tar.gz
[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/linux/leds.h')
-rw-r--r--include/linux/leds.h51
1 files changed, 51 insertions, 0 deletions
diff --git a/include/linux/leds.h b/include/linux/leds.h
new file mode 100644
index 00000000000..6812640b39c
--- /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 */