arm64: dts: qcom: sm8150-kumano: Add GPIO keys

Configure hardware buttons (V-, Camera Shutter/Focus) on Kumano
devices.
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Tested-by: Marijn Suijten <marijn.suijten@somainline.org> # On Xperia 1 and Xperia 5
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221210142525.16974-1-konrad.dybcio@linaro.org

arch/arm64/boot/dts/qcom/sm8150-sony-xperia-kumano.dtsi

@@ -47,6 +47,40 @@ framebuffer: framebuffer@9c000000 {
 		};
 	};
 
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&focus_n &snapshot_n &vol_down_n>;
+
+		key-camera-focus {
+			label = "Camera Focus";
+			linux,code = <KEY_CAMERA_FOCUS>;
+			gpios = <&pm8150b_gpios 2 GPIO_ACTIVE_LOW>;
+			debounce-interval = <15>;
+			linux,can-disable;
+			gpio-key,wakeup;
+		};
+
+		key-camera-snapshot {
+			label = "Camera Snapshot";
+			linux,code = <KEY_CAMERA>;
+			gpios = <&pm8150b_gpios 1 GPIO_ACTIVE_LOW>;
+			debounce-interval = <15>;
+			linux,can-disable;
+			gpio-key,wakeup;
+		};
+
+		key-vol-down {
+			label = "Volume Down";
+			linux,code = <KEY_VOLUMEDOWN>;
+			gpios = <&pm8150_gpios 1 GPIO_ACTIVE_LOW>;
+			debounce-interval = <15>;
+			linux,can-disable;
+			gpio-key,wakeup;
+		};
+	};
+
 	vph_pwr: vph-pwr-regulator {
 		compatible = "regulator-fixed";
 		regulator-name = "vph_pwr";
@@ -411,6 +445,34 @@ &i2c10 {
 	/* Samsung touchscreen @ 48 */
 };
 
+&pm8150_gpios {
+	vol_down_n: vol-down-n-state {
+		pins = "gpio1";
+		function = "normal";
+		power-source = <0>;
+		bias-pull-up;
+		input-enable;
+	};
+};
+
+&pm8150b_gpios {
+	snapshot_n: snapshot-n-state {
+		pins = "gpio1";
+		function = "normal";
+		power-source = <0>;
+		bias-pull-up;
+		input-enable;
+	};
+
+	focus_n: focus-n-state {
+		pins = "gpio2";
+		function = "normal";
+		power-source = <0>;
+		bias-pull-up;
+		input-enable;
+	};
+};
+
 &pon_pwrkey {
 	status = "okay";
 };