diff --git a/arch/arm64/boot/dts/renesas/salvator-common.dtsi b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
index d298f7c9ada1..7f91ff524109 100644
--- a/arch/arm64/boot/dts/renesas/salvator-common.dtsi
+++ b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
@@ -474,6 +474,8 @@ adv7482_txb: endpoint {
 &i2c_dvfs {
 	status = "okay";
 
+	clock-frequency = <400000>;
+
 	pmic: pmic@30 {
 		pinctrl-0 = <&irq0_pins>;
 		pinctrl-names = "default";
diff --git a/arch/arm64/boot/dts/renesas/ulcb.dtsi b/arch/arm64/boot/dts/renesas/ulcb.dtsi
index 7e6078508ba0..30506c5ba4e9 100644
--- a/arch/arm64/boot/dts/renesas/ulcb.dtsi
+++ b/arch/arm64/boot/dts/renesas/ulcb.dtsi
@@ -241,6 +241,8 @@ versaclock5: clock-generator@6a {
 &i2c_dvfs {
 	status = "okay";
 
+	clock-frequency = <400000>;
+
 	pmic: pmic@30 {
 		pinctrl-0 = <&irq0_pins>;
 		pinctrl-names = "default";