diff --git a/arch/arm64/boot/dts/renesas/ulcb.dtsi b/arch/arm64/boot/dts/renesas/ulcb.dtsi
index 84b4daddced0..0467cd051710 100644
--- a/arch/arm64/boot/dts/renesas/ulcb.dtsi
+++ b/arch/arm64/boot/dts/renesas/ulcb.dtsi
@@ -189,6 +189,12 @@ cs2000: clk-multiplier@4f {
 	};
 };
 
+&i2c4 {
+	status = "okay";
+
+	clock-frequency = <400000>;
+};
+
 &i2c_dvfs {
 	status = "okay";
 };