backlight: Add Epson L4F00242T03 LCD driver

The Epson LCD L4F00242T03 is mounted on the Freescale i.MX31 PDK board. 
Based upon Marek Vasut work in l4f00242t03.c, this driver provides
basic init and power on/off functionality for this device through the
sysfs lcd interface.

Unfortunately Datasheet for this device are not available and
all the control sequences sent to the display were copied from the
freescale driver that in the i.MX31 Linux BSP.

As in the i.MX31PDK board the core and io suppliers are voltage
regulators, that functionality is embedded here, but not strict.

Signed-off-by: Alberto Panizzo <maramaopercheseimorto@gmail.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index 0c77fc610212..c025c84601b0 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -31,6 +31,13 @@ config LCD_CORGI
           Say y here to support the LCD panels usually found on SHARP
           corgi (C7x0) and spitz (Cxx00) models.
 
+config LCD_L4F00242T03
+        tristate "Epson L4F00242T03 LCD"
+        depends on LCD_CLASS_DEVICE && SPI_MASTER && GENERIC_GPIO
+        help
+          SPI driver for Epson L4F00242T03. This provides basic support
+          for init and powering the LCD up/down through a sysfs interface.
+
 config LCD_LMS283GF05
         tristate "Samsung LMS283GF05 LCD"
         depends on LCD_CLASS_DEVICE && SPI_MASTER && GENERIC_GPIO