diff --git a/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi b/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
index a5307745719a..93398cfae97e 100644
--- a/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
+++ b/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
@@ -80,6 +80,14 @@
 		dais = <&sai2a_port &sai2b_port &i2s2_port>;
 		status = "okay";
 	};
+
+	vin: vin {
+		compatible = "regulator-fixed";
+		regulator-name = "vin";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-always-on;
+	};
 };
 
 &adc {
@@ -240,9 +248,18 @@
 
 		regulators {
 			compatible = "st,stpmic1-regulators";
+			buck1-supply = <&vin>;
+			buck2-supply = <&vin>;
+			buck3-supply = <&vin>;
+			buck4-supply = <&vin>;
 			ldo1-supply = <&v3v3>;
+			ldo2-supply = <&vin>;
 			ldo3-supply = <&vdd_ddr>;
+			ldo4-supply = <&vin>;
+			ldo5-supply = <&vin>;
 			ldo6-supply = <&v3v3>;
+			vref_ddr-supply = <&vin>;
+			boost-supply = <&vin>;
 			pwr_sw1-supply = <&bst_out>;
 			pwr_sw2-supply = <&bst_out>;