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 <ldewan...@nvidia.com>
---
Changes from V1:
- Reorder the nodes.

 arch/arm/boot/dts/tegra114-dalmore.dts |   30 ++++++++++++++++++++++++++++++
 1 files changed, 30 insertions(+), 0 deletions(-)

diff --git a/arch/arm/boot/dts/tegra114-dalmore.dts 
b/arch/arm/boot/dts/tegra114-dalmore.dts
index cb640eb..259b517 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 = "VolumeDown";
+                       gpios = <&gpio TEGRA_GPIO(R, 1) GPIO_ACTIVE_LOW>;
+                       linux,code = <114>; /* KEY_VOLUMEDOWN */
+               };
+
+               volume_up {
+                       label = "VolumeUp";
+                       gpios = <&gpio TEGRA_GPIO(R, 2) GPIO_ACTIVE_LOW>;
+                       linux,code = <115>; /* KEY_VOLUMEUP */
+               };
+       };
+
        regulators {
                compatible = "simple-bus";
                #address-cells = <1>;
@@ -976,4 +1005,5 @@
                         <&tegra_car TEGRA114_CLK_EXTERN1>;
                clock-names = "pll_a", "pll_a_out0", "mclk";
        };
+
 };
-- 
1.7.1.1

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