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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/linux/lcd.h
Linux-2.6.12-rc2v2.6.12-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.h56
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 @@
1/*
2 * LCD Lowlevel Control Abstraction
3 *
4 * Copyright (C) 2003,2004 Hewlett-Packard Company
5 *
6 */
7
8#ifndef _LINUX_LCD_H
9#define _LINUX_LCD_H
10
11#include <linux/device.h>
12#include <linux/notifier.h>
13
14struct lcd_device;
15struct fb_info;
16
17/* This structure defines all the properties of a LCD flat panel. */
18struct lcd_properties {
19 /* Owner module */
20 struct module *owner;
21 /* Get the LCD panel power status (0: full on, 1..3: controller
22 power on, flat panel power off, 4: full off), see FB_BLANK_XXX */
23 int (*get_power)(struct lcd_device *);
24 /* Enable or disable power to the LCD (0: on; 4: off, see FB_BLANK_XXX) */
25 int (*set_power)(struct lcd_device *, int power);
26 /* The maximum value for contrast (read-only) */
27 int max_contrast;
28 /* Get the current contrast setting (0-max_contrast) */
29 int (*get_contrast)(struct lcd_device *);
30 /* Set LCD panel contrast */
31 int (*set_contrast)(struct lcd_device *, int contrast);
32 /* Check if given framebuffer device is the one LCD is bound to;
33 return 0 if not, !=0 if it is. If NULL, lcd always matches the fb. */
34 int (*check_fb)(struct fb_info *);
35};
36
37struct lcd_device {
38 /* This protects the 'props' field. If 'props' is NULL, the driver that
39 registered this device has been unloaded, and if class_get_devdata()
40 points to something in the body of that driver, it is also invalid. */
41 struct semaphore sem;
42 /* If this is NULL, the backing module is unloaded */
43 struct lcd_properties *props;
44 /* The framebuffer notifier block */
45 struct notifier_block fb_notif;
46 /* The class device structure */
47 struct class_device class_dev;
48};
49
50extern struct lcd_device *lcd_device_register(const char *name,
51 void *devdata, struct lcd_properties *lp);
52extern void lcd_device_unregister(struct lcd_device *ld);
53
54#define to_lcd_device(obj) container_of(obj, struct lcd_device, class_dev)
55
56#endif