[PATCH V3] ARM: tegra: enable gpio-keys on dalmore

[Laxman Dewangan <ldewangan@nvidia.com>]

Dalmore have the keys mounted on board which are connected
to different pins of Tegra.

Add the keys entry in DTS file to enable key functionality.
This will enable KEY_POWER, KEY_HOME, KEY_VOLUMEUP and
KEY_VOLUMEDOWN.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
---
Changes from V1:
- Reorder the nodes

Changes from V2:
- Remove unwanted line insertion.
- Rename VolumeUP/Volume down lables.

 arch/arm/boot/dts/tegra114-dalmore.dts |   29 +++++++++++++++++++++++++++++
 1 files changed, 29 insertions(+), 0 deletions(-)

diff --git a/arch/arm/boot/dts/tegra114-dalmore.dts b/arch/arm/boot/dts/tegra114-dalmore.dts
index cb640eb..a42bfa4 100644
--- a/arch/arm/boot/dts/tegra114-dalmore.dts
+++ b/arch/arm/boot/dts/tegra114-dalmore.dts
@@ -883,6 +883,35 @@
 		};
 	};
 
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		home {
+			label = "Home";
+			gpios = <&gpio TEGRA_GPIO(I, 5) GPIO_ACTIVE_LOW>;
+			linux,code = <102>; /* KEY_HOME */
+		};
+
+		power {
+			label = "Power";
+			gpios = <&gpio TEGRA_GPIO(Q, 0) GPIO_ACTIVE_LOW>;
+			linux,code = <116>; /* KEY_POWER */
+			gpio-key,wakeup;
+		};
+
+		volume_down {
+			label = "Volume Down";
+			gpios = <&gpio TEGRA_GPIO(R, 1) GPIO_ACTIVE_LOW>;
+			linux,code = <114>; /* KEY_VOLUMEDOWN */
+		};
+
+		volume_up {
+			label = "Volume Up";
+			gpios = <&gpio TEGRA_GPIO(R, 2) GPIO_ACTIVE_LOW>;
+			linux,code = <115>; /* KEY_VOLUMEUP */
+		};
+	};
+
 	regulators {
 		compatible = "simple-bus";
 		#address-cells = <1>;
-- 
1.7.1.1