1 /* Public domain. */ 2 3 #ifndef _LINUX_BACKLIGHT_H 4 #define _LINUX_BACKLIGHT_H 5 6 #include <sys/task.h> 7 8 struct backlight_device; 9 10 struct backlight_properties { 11 int type; 12 int max_brightness; 13 int brightness; 14 int power; 15 }; 16 17 struct backlight_ops { 18 int options; 19 int (*update_status)(struct backlight_device *); 20 int (*get_brightness)(struct backlight_device *); 21 }; 22 23 #define BL_CORE_SUSPENDRESUME 1 24 25 struct backlight_device { 26 const struct backlight_ops *ops; 27 struct backlight_properties props; 28 struct task task; 29 void *data; 30 }; 31 32 #define bl_get_data(bd) (bd)->data 33 34 #define BACKLIGHT_RAW 0 35 #define BACKLIGHT_FIRMWARE 1 36 37 #define BACKLIGHT_UPDATE_HOTKEY 0 38 39 struct backlight_device *backlight_device_register(const char *, void *, 40 void *, const struct backlight_ops *, struct backlight_properties *); 41 void backlight_device_unregister(struct backlight_device *); 42 43 static inline void 44 backlight_update_status(struct backlight_device *bd) 45 { 46 bd->ops->update_status(bd); 47 } 48 49 static inline void 50 backlight_force_update(struct backlight_device *bd, int reason) 51 { 52 bd->props.brightness = bd->ops->get_brightness(bd); 53 } 54 55 static inline void 56 backlight_device_set_brightness(struct backlight_device *bd, int level) 57 { 58 if (level > bd->props.max_brightness) 59 return; 60 bd->props.brightness = level; 61 bd->ops->update_status(bd); 62 } 63 64 void backlight_schedule_update_status(struct backlight_device *); 65 66 int backlight_enable(struct backlight_device *); 67 int backlight_disable(struct backlight_device *); 68 69 #define devm_of_find_backlight(x) NULL 70 71 #endif 72