ARM: dts: qcom: pm8226: Add VADC node

Add a node for the voltage ADC (VADC) found in PM8226.

Signed-off-by: Rayyan Ansari <rayyan@ansari.sh>

arch/arm/boot/dts/qcom-pm8226.dtsi

@@ -40,6 +40,39 @@
 			chg_otg: otg-vbus { };
 		};
 
+		pm8226_vadc: adc@3100 {
+			compatible = "qcom,spmi-vadc";
+			reg = <0x3100>;
+			interrupts = <0x0 0x31 0x0 IRQ_TYPE_EDGE_RISING>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			#io-channel-cells = <1>;
+
+			adc-chan@7 {
+				reg = <VADC_VSYS>;
+				qcom,pre-scaling = <1 3>;
+				label = "vph_pwr";
+			};
+			adc-chan@8 {
+				reg = <VADC_DIE_TEMP>;
+				label = "die_temp";
+			};
+			adc-chan@9 {
+				reg = <VADC_REF_625MV>;
+				label = "ref_625mv";
+			};
+			adc-chan@a {
+				reg = <VADC_REF_1250MV>;
+				label = "ref_1250mv";
+			};
+			adc-chan@e {
+				reg = <VADC_GND_REF>;
+			};
+			adc-chan@f {
+				reg = <VADC_VDD_VADC>;
+			};
+		};
+
 		pm8226_mpps: mpps@a000 {
 			compatible = "qcom,pm8226-mpp", "qcom,spmi-mpp";
 			reg = <0xa000>;