[PATCH] Rewritten backlight infrastructure for portable Apple computers

This patch contains a total rewrite of the backlight infrastructure for
portable Apple computers.  Backward compatibility is retained.  A sysfs
interface allows userland to control the brightness with more steps than
before.  Userland is allowed to upload a brightness curve for different
monitors, similar to Mac OS X.

[akpm@osdl.org: add needed exports]
Signed-off-by: Michael Hanselmann <linux-kernel@hansmi.ch>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 56 insertions, 0 deletions

diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 5a2840aeb547..168ede7902bd 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -86,6 +86,11 @@ config FB_FIRMWARE_EDID
          combination with certain motherboards and monitors are known to
          suffer from this problem.
 
+config FB_BACKLIGHT
+       bool
+       depends on FB
+       default n
+
 config FB_MODE_HELPERS
         bool "Enable Video Mode Handling Helpers"
         depends on FB
@@ -717,6 +722,16 @@ config FB_NVIDIA_I2C
           independently validate video mode parameters, you should say Y
           here.
 
+config FB_NVIDIA_BACKLIGHT
+        bool "Support for backlight control"
+        depends on FB_NVIDIA && PPC_PMAC
+        select FB_BACKLIGHT
+        select BACKLIGHT_LCD_SUPPORT
+        select BACKLIGHT_CLASS_DEVICE
+        default y
+        help
+          Say Y here if you want to control the backlight of your display.
+
 config FB_RIVA
         tristate "nVidia Riva support"
         depends on FB && PCI
@@ -755,6 +770,16 @@ config FB_RIVA_DEBUG
           of debugging informations to provide to the maintainer when
           something goes wrong.
 
+config FB_RIVA_BACKLIGHT
+        bool "Support for backlight control"
+        depends on FB_RIVA && PPC_PMAC
+        select FB_BACKLIGHT
+        select BACKLIGHT_LCD_SUPPORT
+        select BACKLIGHT_CLASS_DEVICE
+        default y
+        help
+          Say Y here if you want to control the backlight of your display.
+
 config FB_I810
         tristate "Intel 810/815 support (EXPERIMENTAL)"
         depends on FB && EXPERIMENTAL && PCI && X86_32
@@ -993,6 +1018,7 @@ config FB_RADEON
 
           There is a product page at
           http://apps.ati.com/ATIcompare/
+
 config FB_RADEON_I2C
         bool "DDC/I2C for ATI Radeon support"
         depends on FB_RADEON
@@ -1000,6 +1026,16 @@ config FB_RADEON_I2C
         help
           Say Y here if you want DDC/I2C support for your Radeon board. 
 
+config FB_RADEON_BACKLIGHT
+        bool "Support for backlight control"
+        depends on FB_RADEON && PPC_PMAC
+        select FB_BACKLIGHT
+        select BACKLIGHT_LCD_SUPPORT
+        select BACKLIGHT_CLASS_DEVICE
+        default y
+        help
+          Say Y here if you want to control the backlight of your display.
+
 config FB_RADEON_DEBUG
         bool "Lots of debug output from Radeon driver"
         depends on FB_RADEON
@@ -1024,6 +1060,16 @@ config FB_ATY128
           To compile this driver as a module, choose M here: the
           module will be called aty128fb.
 
+config FB_ATY128_BACKLIGHT
+        bool "Support for backlight control"
+        depends on FB_ATY128 && PPC_PMAC
+        select FB_BACKLIGHT
+        select BACKLIGHT_LCD_SUPPORT
+        select BACKLIGHT_CLASS_DEVICE
+        default y
+        help
+          Say Y here if you want to control the backlight of your display.
+
 config FB_ATY
         tristate "ATI Mach64 display support" if PCI || ATARI
         depends on FB && !SPARC32
@@ -1066,6 +1112,16 @@ config FB_ATY_GX
           is at
           <http://support.ati.com/products/pc/mach64/graphics_xpression.html>.
 
+config FB_ATY_BACKLIGHT
+        bool "Support for backlight control"
+        depends on FB_ATY && PPC_PMAC
+        select FB_BACKLIGHT
+        select BACKLIGHT_LCD_SUPPORT
+        select BACKLIGHT_CLASS_DEVICE
+        default y
+        help
+          Say Y here if you want to control the backlight of your display.
+
 config FB_S3TRIO
         bool "S3 Trio display support"
         depends on (FB = y) && PPC && BROKEN