omap: ZOOM: QUART: Request reset GPIO

Reset GPIO (OMAP_GPIO_152) for QUART in zoom2/zoom3 debug-board is
not requested at all. This would lead to problems if this GPIO is
wrongly requested. Hence request OMAP GPIO 152 for QUART RESET but
do not apply a reset pulse as it would reset QUART and
disturb the QUART settings.

Signed-off-by: Charulatha V <charu@ti.com>
Acked-by: Kevin Hilman <khilman@ti.com>
Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/board-zoom-debugboard.c b/arch/arm/mach-omap2/board-zoom-debugboard.c
index 6402e781c458..369c2eb7715b 100644
--- a/arch/arm/mach-omap2/board-zoom-debugboard.c
+++ b/arch/arm/mach-omap2/board-zoom-debugboard.c
@@ -23,6 +23,7 @@
 #define ZOOM_SMSC911X_GPIO      158
 #define ZOOM_QUADUART_CS        3
 #define ZOOM_QUADUART_GPIO      102
+#define ZOOM_QUADUART_RST_GPIO  152
 #define QUART_CLK               1843200
 #define DEBUG_BASE              0x08000000
 #define ZOOM_ETHR_START DEBUG_BASE
@@ -67,6 +68,14 @@ static inline void __init zoom_init_quaduart(void)
         unsigned long cs_mem_base;
         int quart_gpio = 0;
 
+        if (gpio_request_one(ZOOM_QUADUART_RST_GPIO,
+                                GPIOF_OUT_INIT_LOW,
+                                "TL16CP754C GPIO") < 0) {
+                pr_err("Failed to request GPIO%d for TL16CP754C\n",
+                        ZOOM_QUADUART_RST_GPIO);
+                return;
+        }
+
         quart_cs = ZOOM_QUADUART_CS;
 
         if (gpmc_cs_request(quart_cs, SZ_1M, &cs_mem_base) < 0) {