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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/linux/lcd.h | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
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!
Diffstat (limited to 'include/linux/lcd.h')
-rw-r--r-- | include/linux/lcd.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/include/linux/lcd.h b/include/linux/lcd.h new file mode 100644 index 000000000000..d739b2e7eac2 --- /dev/null +++ b/include/linux/lcd.h @@ -0,0 +1,56 @@ +/* + * LCD Lowlevel Control Abstraction + * + * Copyright (C) 2003,2004 Hewlett-Packard Company + * + */ + +#ifndef _LINUX_LCD_H +#define _LINUX_LCD_H + +#include <linux/device.h> +#include <linux/notifier.h> + +struct lcd_device; +struct fb_info; + +/* This structure defines all the properties of a LCD flat panel. */ +struct lcd_properties { + /* Owner module */ + struct module *owner; + /* Get the LCD panel power status (0: full on, 1..3: controller + power on, flat panel power off, 4: full off), see FB_BLANK_XXX */ + int (*get_power)(struct lcd_device *); + /* Enable or disable power to the LCD (0: on; 4: off, see FB_BLANK_XXX) */ + int (*set_power)(struct lcd_device *, int power); + /* The maximum value for contrast (read-only) */ + int max_contrast; + /* Get the current contrast setting (0-max_contrast) */ + int (*get_contrast)(struct lcd_device *); + /* Set LCD panel contrast */ + int (*set_contrast)(struct lcd_device *, int contrast); + /* Check if given framebuffer device is the one LCD is bound to; + return 0 if not, !=0 if it is. If NULL, lcd always matches the fb. */ + int (*check_fb)(struct fb_info *); +}; + +struct lcd_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 lcd_properties *props; + /* The framebuffer notifier block */ + struct notifier_block fb_notif; + /* The class device structure */ + struct class_device class_dev; +}; + +extern struct lcd_device *lcd_device_register(const char *name, + void *devdata, struct lcd_properties *lp); +extern void lcd_device_unregister(struct lcd_device *ld); + +#define to_lcd_device(obj) container_of(obj, struct lcd_device, class_dev) + +#endif |