[ARM] pxa: add generic PWM backlight driver

Patch mostly from Eric Miao, with minor edits by rmk to convert
Eric's driver to a generic PWM-based backlight driver.

Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index dcd8073c2369..30bf7f2f1635 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -112,3 +112,10 @@ config BACKLIGHT_CARILLO_RANCH
         help
           If you have a Intel LE80578 (Carillo Ranch) say Y to enable the
           backlight driver.
+
+config BACKLIGHT_PWM
+        tristate "Generic PWM based Backlight Driver"
+        depends on BACKLIGHT_CLASS_DEVICE && HAVE_PWM
+        help
+          If you have a LCD backlight adjustable by PWM, say Y to enable
+          this driver.