diff --git a/arch/arm/boot/dts/stm32mp15xx-dhcor-som.dtsi b/arch/arm/boot/dts/stm32mp15xx-dhcor-som.dtsi
index 6336c3ca0f0e28..c69908adee1c8d 100644
--- a/arch/arm/boot/dts/stm32mp15xx-dhcor-som.dtsi
+++ b/arch/arm/boot/dts/stm32mp15xx-dhcor-som.dtsi
@@ -60,6 +60,11 @@
 			reg = <0x38000000 0x10000>;
 			no-map;
 		};
+
+		optee_memory: optee@fe000000 {
+			reg = <0xfe000000 0x2000000>;
+			no-map;
+		};
 	};
 };
 
@@ -240,6 +245,10 @@
 	status = "okay";
 };
 
+&optee {
+	status = "okay";
+};
+
 &pwr_regulators {
 	vdd-supply = <&vdd>;
 	vdd_3v3_usbfs-supply = <&vdd_usb>;