summaryrefslogtreecommitdiff
path: root/include/linux/backlight.h
diff options
context:
space:
mode:
authorMatthew Garrett <mjg@redhat.com>2009-07-14 20:06:02 +0400
committerRichard Purdie <rpurdie@linux.intel.com>2009-09-22 00:03:58 +0400
commit325253a6b2de4bdfa9ef0e28b5df8a4a4fe2b677 (patch)
treea9fff6fda2ac9f36b494779e76e66222ce540b28 /include/linux/backlight.h
parent0f7e7273803aa03ad7a0e210461a3db9d35e7abb (diff)
downloadlinux-325253a6b2de4bdfa9ef0e28b5df8a4a4fe2b677.tar.xz
backlight: Allow drivers to update the core, and generate events on changes
Certain hardware will send us events when the backlight brightness changes. Add a function to update the value in the core, and additionally send a uevent so that userspace can pop up appropriate UI. The uevents are flagged depending on whether the update originated in the kernel or from userspace, making it easier to only display UI at the appropriate time. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Diffstat (limited to 'include/linux/backlight.h')
-rw-r--r--include/linux/backlight.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/backlight.h b/include/linux/backlight.h
index 79ca2da81c87..0f5f57858a23 100644
--- a/include/linux/backlight.h
+++ b/include/linux/backlight.h
@@ -27,6 +27,11 @@
* Any other use of the locks below is probably wrong.
*/
+enum backlight_update_reason {
+ BACKLIGHT_UPDATE_HOTKEY,
+ BACKLIGHT_UPDATE_SYSFS,
+};
+
struct backlight_device;
struct fb_info;
@@ -100,6 +105,8 @@ static inline void backlight_update_status(struct backlight_device *bd)
extern struct backlight_device *backlight_device_register(const char *name,
struct device *dev, void *devdata, struct backlight_ops *ops);
extern void backlight_device_unregister(struct backlight_device *bd);
+extern void backlight_force_update(struct backlight_device *bd,
+ enum backlight_update_reason reason);
#define to_backlight_device(obj) container_of(obj, struct backlight_device, dev)