From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- include/linux/backlight.h | 57 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 include/linux/backlight.h (limited to 'include/linux/backlight.h') diff --git a/include/linux/backlight.h b/include/linux/backlight.h new file mode 100644 index 00000000000..bb9e5432232 --- /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 +#include + +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 -- cgit v1.2.3