diff --git a/arch/arm/boot/dts/qcom-sdx55.dtsi b/arch/arm/boot/dts/qcom-sdx55.dtsi
index 21308e87cae6..87a62e018446 100644
--- a/arch/arm/boot/dts/qcom-sdx55.dtsi
+++ b/arch/arm/boot/dts/qcom-sdx55.dtsi
@@ -106,6 +106,12 @@ tz_apps_mem: memory@0x90000000 {
 		};
 	};
 
+	smem {
+		compatible = "qcom,smem";
+		memory-region = <&smem_mem>;
+		hwlocks = <&tcsr_mutex 3>;
+	};
+
 	soc: soc {
 		#address-cells = <1>;
 		#size-cells = <1>;