[PATCH 6/6] arm64: dts: db820c: add support to volume up key

[Srinivas Kandagatla]

This patch adds support to volume-up key found on the board.

Signed-off-by: Srinivas Kandagatla <srinivas.kandaga...@linaro.org>
---
 .../arm64/boot/dts/qcom/apq8096-db820c-pmic-pins.dtsi | 12 ++++++++++++
 arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi          | 19 +++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/apq8096-db820c-pmic-pins.dtsi 
b/arch/arm64/boot/dts/qcom/apq8096-db820c-pmic-pins.dtsi
index 6c1628c..b1142c4 100644
--- a/arch/arm64/boot/dts/qcom/apq8096-db820c-pmic-pins.dtsi
+++ b/arch/arm64/boot/dts/qcom/apq8096-db820c-pmic-pins.dtsi
@@ -12,4 +12,16 @@
                        power-source = <2>; // PM8994_GPIO_S4, 1.8V
                };
        };
+
+       volume_up_gpio: pm8996_gpio2 {
+               pinconf {
+                       pins = "gpio2";
+                       function = "normal";
+                       input-enable;
+                       drive-push-pull;
+                       bias-pull-up;
+                       qcom,drive-strength = <PMIC_GPIO_STRENGTH_NO>;
+                       power-source = <PM8994_GPIO_S4>; // 1.8V
+               };
+       };
 };
diff --git a/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi 
b/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
index 422959b..d2196fc 100644
--- a/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
+++ b/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
@@ -15,6 +15,8 @@
 #include "pm8994.dtsi"
 #include "apq8096-db820c-pins.dtsi"
 #include "apq8096-db820c-pmic-pins.dtsi"
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/gpio/gpio.h>
 
 / {
        aliases {
@@ -87,4 +89,21 @@
                        status = "okay";
                };
        };
+
+
+       gpio_keys {
+               compatible = "gpio-keys";
+               #address-cells = <1>;
+               #size-cells = <0>;
+               autorepeat;
+
+               pinctrl-names = "default";
+               pinctrl-0 = <&volume_up_gpio>;
+
+               button@0 {
+                       label = "Volume Up";
+                       linux,code = <KEY_VOLUMEUP>;
+                       gpios = <&pm8994_gpios 2 GPIO_ACTIVE_LOW>;
+               };
+       };
 };
-- 
2.10.1