@@ -27,6 +27,30 @@ arm-pmu {
 		interrupt-parent = <&intc>;
 	};
 
+	firmware {
+		optee {
+			method = "smc";
+			compatible = "linaro,optee-tz";
+		};
+
+		scmi: scmi {
+			compatible = "linaro,scmi-optee";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			linaro,optee-channel-id = <0>;
+			shmem = <&scmi_shm>;
+
+			scmi_clk: protocol@14 {
+				reg = <0x14>;
+				#clock-cells = <1>;
+			};
+
+			scmi_reset: protocol@16 {
+				reg = <0x16>;
+				#reset-cells = <1>;
+			};
+		};
+	};
 	clocks {
 		clk_axi: clk-axi {
 			#clock-cells = <0>;

@@ -113,6 +137,19 @@ soc {
 		interrupt-parent = <&intc>;
 		ranges;
 
+		scmi_sram: sram@2ffff000 {
+			compatible = "mmio-sram";
+			reg = <0x2ffff000 0x1000>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0 0x2ffff000 0x1000>;
+
+			scmi_shm: scmi-sram@0 {
+				compatible = "arm,scmi-shmem";
+				reg = <0 0x80>;
+			};
+		};
+
 		uart4: serial@40010000 {
 			compatible = "st,stm32h7-uart";
 			reg = <0x40010000 0x400>;