This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / linux / backlight.h

diff --git a/include/linux/backlight.h b/include/linux/backlight.h
new file mode 100644 (file)
index 0000000..bb9e543
--- /dev/null
+++ b/include/linux/backlight.h
@@ -0,0 +1,57 @@
+/*
+ * Backlight Lowlevel Control Abstraction
+ *
+ * Copyright (C) 2003,2004 Hewlett-Packard Company
+ *
+ */
+
+#ifndef _LINUX_BACKLIGHT_H
+#define _LINUX_BACKLIGHT_H
+
+#include <linux/device.h>
+#include <linux/notifier.h>
+
+struct backlight_device;
+struct fb_info;
+
+/* This structure defines all the properties of a backlight
+   (usually attached to a LCD). */
+struct backlight_properties {
+       /* Owner module */
+       struct module *owner;
+       /* Get the backlight power status (0: full on, 1..3: power saving
+          modes; 4: full off), see FB_BLANK_XXX */
+       int (*get_power)(struct backlight_device *);
+       /* Enable or disable power to the LCD (0: on; 4: off, see FB_BLANK_XXX) */
+       int (*set_power)(struct backlight_device *, int power);
+       /* Maximal value for brightness (read-only) */
+       int max_brightness;
+       /* Get current backlight brightness */
+       int (*get_brightness)(struct backlight_device *);
+       /* Set backlight brightness (0..max_brightness) */
+       int (*set_brightness)(struct backlight_device *, int brightness);
+       /* Check if given framebuffer device is the one bound to this backlight;
+          return 0 if not, !=0 if it is. If NULL, backlight always matches the fb. */
+       int (*check_fb)(struct fb_info *);
+};
+
+struct backlight_device {
+       /* This protects the 'props' field. If 'props' is NULL, the driver that
+          registered this device has been unloaded, and if class_get_devdata()
+          points to something in the body of that driver, it is also invalid. */
+       struct semaphore sem;
+       /* If this is NULL, the backing module is unloaded */
+       struct backlight_properties *props;
+       /* The framebuffer notifier block */
+       struct notifier_block fb_notif;
+       /* The class device structure */
+       struct class_device class_dev;
+};
+
+extern struct backlight_device *backlight_device_register(const char *name,
+       void *devdata, struct backlight_properties *bp);
+extern void backlight_device_unregister(struct backlight_device *bd);
+
+#define to_backlight_device(obj) container_of(obj, struct backlight_device, class_dev)
+
+#endif