RFC [patch] backlight sysfs support for video.c

This patch adds brightness sysfs support for acpi video driver through backlight class. Any comments are appreciated.

--Luming

 Kconfig |    2 +-
 video.c |   50 +++++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 50 insertions(+), 2 deletions(-)

-- diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index 56c5ba8..d5507ea 100644

@@ -106,7 +106,7 @@ config ACPI_BUTTON
 
 config ACPI_VIDEO
 	tristate "Video"
-	depends on X86
+	depends on X86 && BACKLIGHT_DEVICE
 	help
 	  This driver implement the ACPI Extensions For Display Adapters
 	  for integrated graphics devices on motherboard, as specified in

Thanks,
Luming