ARM: dts: qcom: pm8226: Add VADC node

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

Signed-off-by: Rayyan Ansari <[e-mail]>
Signed-off-by: Bjorn Andersson <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

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

···
 // SPDX-License-Identifier: BSD-3-Clause
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/spmi/spmi.h>
+#include <dt-bindings/iio/qcom,spmi-vadc.h>
 
 &spmi_bus {
 	pm8226_0: pm8226@0 {
···
 			reg = <0x6000>, <0x6100>;
 			reg-names = "rtc", "alarm";
 			interrupts = <0x0 0x61 0x1 IRQ_TYPE_EDGE_RISING>;
+		};
+
+		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 {