1 /*
2  * Routines for handling backlight control on PowerBooks
3  *
4  * For now, implementation resides in arch/ppc/kernel/pmac_support.c
5  *
6  */
7 #ifdef __KERNEL__
8 #ifndef __ASM_PPC_BACKLIGHT_H
9 #define __ASM_PPC_BACKLIGHT_H
10 
11 /* Abstract values */
12 #define BACKLIGHT_OFF	0
13 #define BACKLIGHT_MIN	1
14 #define BACKLIGHT_MAX	0xf
15 
16 struct backlight_controller {
17 	int (*set_enable)(int enable, int level, void *data);
18 	int (*set_level)(int level, void *data);
19 };
20 
21 extern void register_backlight_controller(struct backlight_controller *ctrler, void *data, char *type);
22 extern void unregister_backlight_controller(struct backlight_controller *ctrler, void *data);
23 
24 extern int set_backlight_enable(int enable);
25 extern int get_backlight_enable(void);
26 extern int set_backlight_level(int level);
27 extern int get_backlight_level(void);
28 
29 #endif
30 #endif /* __KERNEL__ */
31