backlight: Add Samsung LTV350QV LCD driver

This patch adds support for powering on and off the Samsung LTV350QV LCD
panel via SPI.  The driver responds to framebuffer power management, it
powers off the panel on reboot/halt/poweroff.  It can also be controlled
through sysfs.  The panel is powered up when the module is loaded, and off
when the module is unloaded.  Verified on AVR32 STK1000.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index 2580f5fa2486..b6f936a09185 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -24,6 +24,18 @@ config LCD_CLASS_DEVICE
           To have support for your specific LCD panel you will have to
           select the proper drivers which depend on this option.
 
+config LCD_LTV350QV
+        tristate "Samsung LTV350QV LCD Panel"
+        depends on LCD_CLASS_DEVICE && SPI_MASTER
+        default n
+        help
+          If you have a Samsung LTV350QV LCD panel, say y to include a
+          power control driver for it.  The panel starts up in power
+          off state, so you need this driver in order to see any
+          output.
+
+          The LTV350QV panel is present on all ATSTK1000 boards.
+
 #
 # Backlight
 #