tree 21cdbb8c988eed585437bb502ca15c2998ea7fbc
parent b5c6916b3118d4301dc2f8cf8d33f13e5324a3a5
author Richard Purdie <rpurdie@rpsys.net> 1171116633 +0000
committer Richard Purdie <rpurdie@rpsys.net> 1171960726 +0000

backlight: Rework backlight/fb interaction simplifying, lots

fb_info->bl_mutex is badly thought out and the backlight class doesn't
need it if the framebuffer/backlight register/unregister order is
consistent, particularly after the backlight locking fixes.

Fix the drivers to use the order:

backlight_device_register()
register_framebuffer()
unregister_framebuffer()
backlight_device_unregister()

and turn bl_mutex into a lock for the bl_curve data only.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>