diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
index 2ddad9318554..56504578c464 100644
--- a/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
@@ -655,4 +655,44 @@
 		power-domains = <&k3_pds 154 TI_SCI_PD_SHARED>;
 		#thermal-sensor-cells = <1>;
 	};
+
+	mcu_r5fss0: r5fss@41000000 {
+		compatible = "ti,j721s2-r5fss";
+		ti,cluster-mode = <1>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0x41000000 0x00 0x41000000 0x20000>,
+			 <0x41400000 0x00 0x41400000 0x20000>;
+		power-domains = <&k3_pds 283 TI_SCI_PD_EXCLUSIVE>;
+
+		mcu_r5fss0_core0: r5f@41000000 {
+			compatible = "ti,j721s2-r5f";
+			reg = <0x41000000 0x00010000>,
+			      <0x41010000 0x00010000>;
+			reg-names = "atcm", "btcm";
+			ti,sci = <&sms>;
+			ti,sci-dev-id = <284>;
+			ti,sci-proc-ids = <0x01 0xff>;
+			resets = <&k3_reset 284 1>;
+			firmware-name = "j721s2-mcu-r5f0_0-fw";
+			ti,atcm-enable = <1>;
+			ti,btcm-enable = <1>;
+			ti,loczrama = <1>;
+		};
+
+		mcu_r5fss0_core1: r5f@41400000 {
+			compatible = "ti,j721s2-r5f";
+			reg = <0x41400000 0x00010000>,
+			      <0x41410000 0x00010000>;
+			reg-names = "atcm", "btcm";
+			ti,sci = <&sms>;
+			ti,sci-dev-id = <285>;
+			ti,sci-proc-ids = <0x02 0xff>;
+			resets = <&k3_reset 285 1>;
+			firmware-name = "j721s2-mcu-r5f0_1-fw";
+			ti,atcm-enable = <1>;
+			ti,btcm-enable = <1>;
+			ti,loczrama = <1>;
+		};
+	};
 };