diff --git a/arch/arm64/boot/dts/renesas/rzg2ul-smarc-som.dtsi b/arch/arm64/boot/dts/renesas/rzg2ul-smarc-som.dtsi
index b0822679a55bcc4460d73a120e1a7fe92baedcea..4c4cd7f2f17beffa508e14276e73db1228eeeac5 100644
--- a/arch/arm64/boot/dts/renesas/rzg2ul-smarc-som.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzg2ul-smarc-som.dtsi
@@ -115,6 +115,14 @@
 	clock-frequency = <24000000>;
 };
 
+&ostm1 {
+	status = "okay";
+};
+
+&ostm2 {
+	status = "okay";
+};
+
 &pinctrl {
 	eth0_pins: eth0 {
 		pinmux = <RZG2L_PORT_PINMUX(4, 5, 1)>, /* ET0_LINKSTA */