feat(morello): expose scmi protocols in fdts

Add 'firmware' node in morello-soc.dts to expose SCMI
support to the kernel. The SCMI protocols supported at
the moment are SCMI Base, Clock and Perf (DVFS).

The current mailbox memory region in MHU SRAM has an issue
with any access not aligned to a 4-byte boundary. So, the SCMI
mailbox memory region has been relocated to AP non-trusted
RAM to get around the problem.

Signed-off-by: Anurag Koul <anurag.koul@arm.com>
Change-Id: Ibcbce8823b751a0fc3be7e9bc3588c1dc47ae024

fdts/morello-soc.dts

@@ -32,24 +32,28 @@
 			reg = <0x0 0x0>;
 			device_type = "cpu";
 			enable-method = "psci";
+			clocks = <&scmi_dvfs 0>;
 		};
 		cpu1@100 {
 			compatible = "arm,armv8";
 			reg = <0x0 0x100>;
 			device_type = "cpu";
 			enable-method = "psci";
+			clocks = <&scmi_dvfs 0>;
 		};
 		cpu2@10000 {
 			compatible = "arm,armv8";
 			reg = <0x0 0x10000>;
 			device_type = "cpu";
 			enable-method = "psci";
+			clocks = <&scmi_dvfs 1>;
 		};
 		cpu3@10100 {
 			compatible = "arm,armv8";
 			reg = <0x0 0x10100>;
 			device_type = "cpu";
 			enable-method = "psci";
+			clocks = <&scmi_dvfs 1>;
 		};
 	};
 
@@ -166,7 +170,7 @@
 
 		pl0: pipeline@0 {
 			reg = <0>;
-			clocks = <&dpu_pixel_clk>;
+			clocks = <&scmi_clk 1>;
 			clock-names = "pxclk";
 			pl_id = <0>;
 			ports {
@@ -212,11 +216,23 @@
 		clock-output-names = "aclk";
 	};
 
-	dpu_pixel_clk: dpu-pixel-clk {
+	firmware {
-		compatible = "fixed-clock";
+		scmi {
-		#clock-cells = <0>;
+			compatible = "arm,scmi";
-		clock-frequency = <148500000>;
+			mbox-names = "tx", "rx";
-		clock-output-names = "pxclk";
+			mboxes = <&mailbox 1 0 &mailbox 1 1>;
+			shmem = <&cpu_scp_hpri0 &cpu_scp_hpri1>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			scmi_dvfs: protocol@13 {
+				reg = <0x13>;
+				#clock-cells = <1>;
+			};
+			scmi_clk: protocol@14 {
+				reg = <0x14>;
+				#clock-cells = <1>;
+			};
+		};
 	};
 };
 

fdts/morello.dtsi

@@ -64,11 +64,11 @@
 
 	sram: sram@45200000 {
 		compatible = "mmio-sram";
-		reg = <0x0 0x45200000 0x0 0x8000>;
+		reg = <0x0 0x06000000 0x0 0x8000>;
 
 		#address-cells = <1>;
 		#size-cells = <1>;
-		ranges = <0 0x0 0x45200000 0x8000>;
+		ranges = <0 0x0 0x06000000 0x8000>;
 
 		cpu_scp_hpri0: scp-shmem@0 {
 			compatible = "arm,scmi-shmem";