| 7,4 → 7,36 |
|---|
| |
| #ifndef _LINUX_BACKLIGHT_H |
| #define _LINUX_BACKLIGHT_H |
| /* Notes on locking: |
| * |
| * backlight_device->ops_lock is an internal backlight lock protecting the |
| * ops pointer and no code outside the core should need to touch it. |
| * |
| * Access to update_status() is serialised by the update_lock mutex since |
| * most drivers seem to need this and historically get it wrong. |
| * |
| * Most drivers don't need locking on their get_brightness() method. |
| * If yours does, you need to implement it in the driver. You can use the |
| * update_lock mutex if appropriate. |
| * |
| * Any other use of the locks below is probably wrong. |
| */ |
| |
| enum backlight_update_reason { |
| BACKLIGHT_UPDATE_HOTKEY, |
| BACKLIGHT_UPDATE_SYSFS, |
| }; |
| |
| enum backlight_type { |
| BACKLIGHT_RAW = 1, |
| BACKLIGHT_PLATFORM, |
| BACKLIGHT_FIRMWARE, |
| BACKLIGHT_TYPE_MAX, |
| }; |
| |
| enum backlight_notification { |
| BACKLIGHT_REGISTERED, |
| BACKLIGHT_UNREGISTERED, |
| }; |
| |
| #endif |