arm64: dts: qcom: sm8250-edo: Add hardware keys

Volume Down, GAssist (pdx206 only) and camera keys live on PMIC pins,
with the latter kind being broken for now.. Add these and PON-connected
Volume Up & PWR.

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Link: https://lore.kernel.org/r/20210616122708.144770-1-konrad.dybcio@somainline.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/sm8250-sony-xperia-edo-pdx206.dts

@@ -18,6 +18,17 @@
 	stride = <(1080 * 4)>;
 };
 
+&gpio_keys {
+	g-assist-key {
+		label = "Google Assistant Key";
+		linux,code = <KEY_LEFTMETA>;
+		gpios = <&pm8150_gpios 6 GPIO_ACTIVE_LOW>;
+		debounce-interval = <15>;
+		linux,can-disable;
+		gpio-key,wakeup;
+	};
+};
+
 &vreg_l2f_1p3 {
 	regulator-min-microvolt = <1200000>;
 	regulator-max-microvolt = <1200000>;

arch/arm64/boot/dts/qcom/sm8250-sony-xperia-edo.dtsi

@@ -47,6 +47,26 @@
 		};
 	};
 
+	gpio_keys: gpio-keys {
+		compatible = "gpio-keys";
+
+		/*
+		 * Camera focus (light press) and camera snapshot (full press)
+		 * seem not to work properly.. Adding the former one stalls the CPU
+		 * and the latter kills the volume down key for whatever reason. In any
+		 * case, they are both on &pm8150b_gpios: camera focus(2), camera snapshot(1).
+		 */
+
+		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";
@@ -436,6 +456,16 @@
 	/* Richwave RTC6226 FM Radio Receiver @ 64 */
 };
 
+&pon_pwrkey {
+	status = "okay";
+};
+
+&pon_resin {
+	status = "okay";
+
+	linux,code = <KEY_VOLUMEUP>;
+};
+
 &qupv3_id_0 {
 	status = "okay";
 };