mips: xilfpga: Add device tree files

Mostly the same as the Kernel upstream device tree file except for

- alias for the serial console node
- ethernet node as the ethernet stuff isn't upstream on kernel.org yet
- uart clock-frequency passed directly in the node

Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
Reviewed-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

arch/mips/dts/Makefile

@@ -6,6 +6,7 @@ dtb-$(CONFIG_TARGET_AP121) += ap121.dtb
 dtb-$(CONFIG_TARGET_AP143) += ap143.dtb
 dtb-$(CONFIG_TARGET_MALTA) += mti,malta.dtb
 dtb-$(CONFIG_TARGET_PIC32MZDASK) += pic32mzda_sk.dtb
+dtb-$(CONFIG_TARGET_XILFPGA) += nexys4ddr.dtb
 dtb-$(CONFIG_BOARD_TPLINK_WDR4300) += tplink_wdr4300.dtb
 
 targets += $(dtb-y)

arch/mips/dts/microAptiv.dtsi

+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+	compatible = "img,xilfpga";
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		cpu@0 {
+			device_type = "cpu";
+			compatible = "mips,m14Kc";
+			clocks	= <&ext>;
+			reg = <0>;
+		};
+	};
+
+	ext: ext {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+	};
+};

arch/mips/dts/nexys4ddr.dts

+/dts-v1/;
+
+#include "microAptiv.dtsi"
+
+/ {
+	compatible = "digilent,nexys4ddr";
+
+	memory {
+		device_type = "memory";
+		reg = <0x0 0x08000000>;
+	};
+
+	cpuintc: interrupt-controller@0 {
+		#address-cells = <0>;
+		#interrupt-cells = <1>;
+		interrupt-controller;
+		compatible = "mti,cpu-interrupt-controller";
+	};
+
+	aliases {
+		console = &axi_uart16550;
+	};
+
+	axi_ethernetlite: ethernet@10e00000 {
+		compatible = "xlnx,xps-ethernetlite-1.00.a";
+		device_type = "network";
+		local-mac-address = [08 86 4C 0D F7 09];
+		phy-handle = <&phy0>;
+		reg = <0x10e00000 0x10000>;
+		xlnx,duplex = <0x1>;
+		xlnx,include-global-buffers = <0x1>;
+		xlnx,include-internal-loopback = <0x0>;
+		xlnx,include-mdio = <0x1>;
+		xlnx,instance = "axi_ethernetlite_inst";
+		xlnx,rx-ping-pong = <0x1>;
+		xlnx,s-axi-id-width = <0x1>;
+		xlnx,tx-ping-pong = <0x1>;
+		xlnx,use-internal = <0x0>;
+		mdio {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			phy0: phy@1 {
+				compatible = <0x0007c0f0 0xfffffff0>;
+				device_type = "ethernet-phy";
+				reg = <1>;
+			} ;
+		} ;
+        } ;
+
+
+	axi_uart16550: serial@10400000 {
+		compatible = "ns16550a";
+		reg = <0x10400000 0x10000>;
+
+		reg-shift = <2>;
+		reg-offset = <0x1000>;
+
+		clock-frequency = <50000000>;
+
+	};
+};
+