1 files changed, 56 insertions, 0 deletions
diff --git a/include/linux/lcd.h b/include/linux/lcd.h
new file mode 100644
index 0000000..d739b2e
--- /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