atmel_lcdfb: Fix STN LCD support

Fixes STN LCD support for the atmel_lcdfb framebuffer driver.

This patch is the result of a work from Jan Altenberg and has
been tested on a Hitachi SP06Q002 on at91sam9261ek.

It adds a Kconfig switch that enables the proper LCD in the
board configuration file (STN or TFT). The switch is used
in arch/arm/mach-at91/at91sam9261_devices.c & board-sam9261ek.c
as an example.

This patch includes the "Fix wrong line_length calculation"
little one from Jan and Haavard (submitted earlier).

AT91 platform informations are directly submitted trough
the at91 maintainer, here :
http://article.gmane.org/gmane.linux.kernel/543158

Signed-off-by: Nicolas Ferre <nicolas.ferre@rfo.atmel.com>
Cc: "Antonino A. Daplas" <adaplas@gmail.com>
Cc: Jan Altenberg <jan.altenberg@linutronix.de>
Cc: Patrice Vilchez <patrice.vilchez@rfo.atmel.com>
Cc: Andrew Victor <andrew@sanpeople.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 3c0ed933d11d..2a237f09ee5d 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -849,6 +849,16 @@ config FB_INTSRAM
           Say Y if you want to map Frame Buffer in internal SRAM. Say N if you want
           to let frame buffer in external SDRAM.
 
+config FB_ATMEL_STN
+        bool "Use a STN display with AT91/AT32 LCD Controller"
+        depends on FB_ATMEL && MACH_AT91SAM9261EK
+        default n
+        help
+          Say Y if you want to connect a STN LCD display to the AT91/AT32 LCD
+          Controller. Say N if you want to connect a TFT.
+
+          If unsure, say N.
+
 config FB_NVIDIA
         tristate "nVidia Framebuffer Support"
         depends on FB && PCI