diff --git a/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi
index bfe3907b4b55..230d14fe11b4 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi
@@ -317,6 +317,21 @@
 		};
 	};
 
+	secure_proxy_mcu: mailbox@2a480000 {
+		compatible = "ti,am654-secure-proxy";
+		#mbox-cells = <1>;
+		reg-names = "target_data", "rt", "scfg";
+		reg = <0x0 0x2a480000 0x0 0x80000>,
+		      <0x0 0x2a380000 0x0 0x80000>,
+		      <0x0 0x2a400000 0x0 0x80000>;
+		/*
+		 * Marked Disabled:
+		 * Node is incomplete as it is meant for bootloaders and
+		 * firmware on non-MPU processors
+		 */
+		status = "disabled";
+	};
+
 	mcu_cpsw: ethernet@46000000 {
 		compatible = "ti,j721e-cpsw-nuss";
 		#address-cells = <2>;