diff --git a/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts b/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts
index 346e3b016cae..da84bc853d75 100644
--- a/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts
@@ -215,3 +215,8 @@
 		compatible = "brcm,bcm4329-fmac";
 	};
 };
+
+&saradc {
+	status = "okay";
+	vref-supply = <&vddio_ao18>;
+};
diff --git a/arch/arm64/boot/dts/amlogic/meson-axg.dtsi b/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
index e11fec2ba06d..5f4d49e2922e 100644
--- a/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
@@ -91,6 +91,13 @@
 		method = "smc";
 	};
 
+	vddio_ao18: regulator-vddio_ao18 {
+		compatible = "regulator-fixed";
+		regulator-name = "VDDIO_AO18";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+	};
+
 	timer {
 		compatible = "arm,armv8-timer";
 		interrupts = <GIC_PPI 13
@@ -1236,6 +1243,20 @@
 				interrupts = <GIC_SPI 196 IRQ_TYPE_EDGE_RISING>;
 				status = "disabled";
 			};
+
+			saradc: adc@9000 {
+				compatible = "amlogic,meson-axg-saradc",
+					"amlogic,meson-saradc";
+				reg = <0x0 0x9000 0x0 0x38>;
+				#io-channel-cells = <1>;
+				interrupts = <GIC_SPI 73 IRQ_TYPE_EDGE_RISING>;
+				clocks = <&xtal>,
+					<&clkc_AO CLKID_AO_SAR_ADC>,
+					<&clkc_AO CLKID_AO_SAR_ADC_CLK>,
+					<&clkc_AO CLKID_AO_SAR_ADC_SEL>;
+				clock-names = "clkin", "core", "adc_clk", "adc_sel";
+				status = "disabled";
+			};
 		};
 	};
 };