Added GPIO buttons DT node to Arndale board file.

Signed-off-by: Tushar Behera <tushar.beh...@linaro.org>
Signed-off-by: Sachin Kamat <sachin.ka...@linaro.org>
---
Changes for V3:
* Removed redundant #address-cells and #size-cells
* Pin-control related modifications.


 arch/arm/boot/dts/exynos5250-arndale.dts |   46 ++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5250-arndale.dts 
b/arch/arm/boot/dts/exynos5250-arndale.dts
index d07a21f..03c9ad5 100644
--- a/arch/arm/boot/dts/exynos5250-arndale.dts
+++ b/arch/arm/boot/dts/exynos5250-arndale.dts
@@ -122,4 +122,50 @@
                        clock-frequency = <24000000>;
                };
        };
+
+       gpio_keys {
+               compatible = "gpio-keys";
+
+               menu {
+                       label = "SW-TACT2";
+                       gpios = <&gpx1 4 1>;
+                       linux,code = <139>;
+                       gpio-key,wakeup;
+               };
+
+               home {
+                       label = "SW-TACT3";
+                       gpios = <&gpx1 5 1>;
+                       linux,code = <102>;
+                       gpio-key,wakeup;
+               };
+
+               up {
+                       label = "SW-TACT4";
+                       gpios = <&gpx1 6 1>;
+                       linux,code = <103>;
+                       gpio-key,wakeup;
+               };
+
+               down {
+                       label = "SW-TACT5";
+                       gpios = <&gpx1 7 1>;
+                       linux,code = <108>;
+                       gpio-key,wakeup;
+               };
+
+               back {
+                       label = "SW-TACT6";
+                       gpios = <&gpx2 0 1>;
+                       linux,code = <158>;
+                       gpio-key,wakeup;
+               };
+
+               wakeup {
+                       label = "SW-TACT7";
+                       gpios = <&gpx2 1 1>;
+                       linux,code = <143>;
+                       gpio-key,wakeup;
+               };
+       };
 };
-- 
1.7.9.5

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