backlight: Add OMAP1 PWL backlight driver

This adds the OMAP1 PWL-based LCD backlight driver.  It's been in the OMAP
tree for some time.  Note that OMAP2 can do similar things with the generic
timers which have PWM outputs.  Such timers are more generic than the PWL
found on OMAP1 chips, but have a different EMI profile because they aren't
driven by a pseudorandom number generator.

[akpm@linux-foundation.org: cleanups]
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrzej Zaborowski <balrogg@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index 924e2551044a..dcd8073c2369 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -80,6 +80,15 @@ config BACKLIGHT_LOCOMO
           If you have a Sharp Zaurus SL-5500 (Collie) or SL-5600 (Poodle) say y to
           enable the LCD/backlight driver.
 
+config BACKLIGHT_OMAP1
+        tristate "OMAP1 PWL-based LCD Backlight"
+        depends on BACKLIGHT_CLASS_DEVICE && ARCH_OMAP1
+        default y
+        help
+          This driver controls the LCD backlight level and power for
+          the PWL module of OMAP1 processors.  Say Y if your board
+          uses this hardware.
+
 config BACKLIGHT_HP680
         tristate "HP Jornada 680 Backlight Driver"
         depends on BACKLIGHT_CLASS_DEVICE && SH_HP6XX