ARM: palmtreo: fix lcd initilialization on treo680

This patch gets the LCD working on my Palm Treo680 by adding some code that
manages the three gpios interfaced to the lcd on the Treo 680.  The precise role
of each gpio in the hardware architecture is not entirely clear to me; this
patch is the result of trial-and-error and observing how the PalmOS code
initializes the lcd.

The need for this patch is not evident when Linux is loaded from PalmOS, because
at that point the lcd-related gpios have already been configured.  But when
booting the kernel by other means, this patch is required unless the bootloader
has performed the necessary initialializations.

Signed-off-by: Mike Dunn <mikedunn@newsguy.com>
Acked-by: Tomas Cech <sleep_walker@suse.cz>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/arm/mach-pxa/include/mach/palmtreo.h b/arch/arm/mach-pxa/include/mach/palmtreo.h
index 2d3f14e3be29..32661945d4c3 100644
--- a/arch/arm/mach-pxa/include/mach/palmtreo.h
+++ b/arch/arm/mach-pxa/include/mach/palmtreo.h
@@ -44,6 +44,9 @@
 #define GPIO_NR_TREO680_VIBRATE_EN      44
 #define GPIO_NR_TREO680_KEYB_BL         24
 #define GPIO_NR_TREO680_BT_EN           43
+#define GPIO_NR_TREO680_LCD_POWER       77
+#define GPIO_NR_TREO680_LCD_EN          86
+#define GPIO_NR_TREO680_LCD_EN_N        25
 #endif /* CONFIG_MACH_TREO680 */
 
 /* Centro685 specific GPIOs */