xtensa: xtfpga: introduce SoC I/O bus

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

arch/xtensa/boot/dts/xtfpga-flash-16m.dtsi

 / {
-	flash: flash@f8000000 {
-		#address-cells = <1>;
-		#size-cells = <1>;
-		compatible = "cfi-flash";
-		reg = <0xf8000000 0x01000000>;
-		bank-width = <2>;
-		device-width = <2>;
-		partition@0x0 {
-			label = "boot loader area";
-			reg = <0x00000000 0x00400000>;
+	soc {
+		flash: flash@08000000 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "cfi-flash";
+			reg = <0x08000000 0x01000000>;
+			bank-width = <2>;
+			device-width = <2>;
+			partition@0x0 {
+				label = "boot loader area";
+				reg = <0x00000000 0x00400000>;
+			};
+			partition@0x400000 {
+				label = "kernel image";
+				reg = <0x00400000 0x00600000>;
+			};
+			partition@0xa00000 {
+				label = "data";
+				reg = <0x00a00000 0x005e0000>;
+			};
+			partition@0xfe0000 {
+				label = "boot environment";
+				reg = <0x00fe0000 0x00020000>;
+			};
 		};
-		partition@0x400000 {
-			label = "kernel image";
-			reg = <0x00400000 0x00600000>;
-		};
-		partition@0xa00000 {
-			label = "data";
-			reg = <0x00a00000 0x005e0000>;
-		};
-		partition@0xfe0000 {
-			label = "boot environment";
-			reg = <0x00fe0000 0x00020000>;
-		};
-        };
+	};
 };

arch/xtensa/boot/dts/xtfpga-flash-4m.dtsi

 / {
-	flash: flash@f8000000 {
-		#address-cells = <1>;
-		#size-cells = <1>;
-		compatible = "cfi-flash";
-		reg = <0xf8000000 0x00400000>;
-		bank-width = <2>;
-		device-width = <2>;
-		partition@0x0 {
-			label = "boot loader area";
-			reg = <0x00000000 0x003f0000>;
+	soc {
+		flash: flash@08000000 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "cfi-flash";
+			reg = <0x08000000 0x00400000>;
+			bank-width = <2>;
+			device-width = <2>;
+			partition@0x0 {
+				label = "boot loader area";
+				reg = <0x00000000 0x003f0000>;
+			};
+			partition@0x3f0000 {
+				label = "boot environment";
+				reg = <0x003f0000 0x00010000>;
+			};
 		};
-		partition@0x3f0000 {
-			label = "boot environment";
-			reg = <0x003f0000 0x00010000>;
-		};
-        };
+	};
 };

arch/xtensa/boot/dts/xtfpga.dtsi

@@ -42,21 +42,28 @@ osc: main-oscillator {
 		};
 	};
 
-	serial0: serial@fd050020 {
-		device_type = "serial";
-		compatible = "ns16550a";
-		no-loopback-test;
-		reg = <0xfd050020 0x20>;
-		reg-shift = <2>;
-		interrupts = <0 1>; /* external irq 0 */
-		clocks = <&osc>;
-	};
+	soc {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "simple-bus";
+		ranges = <0x00000000 0xf0000000 0x10000000>;
 
-	enet0: ethoc@fd030000 {
-		compatible = "opencores,ethoc";
-		reg = <0xfd030000 0x4000 0xfd800000 0x4000>;
-		interrupts = <1 1>; /* external irq 1 */
-		local-mac-address = [00 50 c2 13 6f 00];
-		clocks = <&osc>;
+		serial0: serial@0d050020 {
+			device_type = "serial";
+			compatible = "ns16550a";
+			no-loopback-test;
+			reg = <0x0d050020 0x20>;
+			reg-shift = <2>;
+			interrupts = <0 1>; /* external irq 0 */
+			clocks = <&osc>;
+		};
+
+		enet0: ethoc@0d030000 {
+			compatible = "opencores,ethoc";
+			reg = <0x0d030000 0x4000 0x0d800000 0x4000>;
+			interrupts = <1 1>; /* external irq 1 */
+			local-mac-address = [00 50 c2 13 6f 00];
+			clocks = <&osc>;
+		};
 	};
 };