DT: MIPS: ralink: add MT7620A dts files

Add a dtsi file for MT7620A SoC and a sample dts file.
Signed-off-by: John Crispin <blogic@openwrt.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Patchwork: http://patchwork.linux-mips.org/patch/5190/

arch/mips/ralink/Kconfig

@@ -46,6 +46,10 @@ choice
 		bool "RT3883 eval kit"
 		depends on SOC_RT3883
 
+	config DTB_MT7620A_EVAL
+		bool "MT7620A eval kit"
+		depends on SOC_MT7620
+
 endchoice
 
 endif

arch/mips/ralink/dts/Makefile

 obj-$(CONFIG_DTB_RT2880_EVAL) := rt2880_eval.dtb.o
 obj-$(CONFIG_DTB_RT305X_EVAL) := rt3052_eval.dtb.o
 obj-$(CONFIG_DTB_RT3883_EVAL) := rt3883_eval.dtb.o
+obj-$(CONFIG_DTB_MT7620A_EVAL) := mt7620a_eval.dtb.o

arch/mips/ralink/dts/mt7620a.dtsi

+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+	compatible = "ralink,mtk7620a-soc";
+
+	cpus {
+		cpu@0 {
+			compatible = "mips,mips24KEc";
+		};
+	};
+
+	cpuintc: cpuintc@0 {
+		#address-cells = <0>;
+		#interrupt-cells = <1>;
+		interrupt-controller;
+		compatible = "mti,cpu-interrupt-controller";
+	};
+
+	palmbus@10000000 {
+		compatible = "palmbus";
+		reg = <0x10000000 0x200000>;
+                ranges = <0x0 0x10000000 0x1FFFFF>;
+
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		sysc@0 {
+			compatible = "ralink,mt7620a-sysc";
+			reg = <0x0 0x100>;
+		};
+
+		intc: intc@200 {
+			compatible = "ralink,mt7620a-intc", "ralink,rt2880-intc";
+			reg = <0x200 0x100>;
+
+			interrupt-controller;
+			#interrupt-cells = <1>;
+
+			interrupt-parent = <&cpuintc>;
+			interrupts = <2>;
+		};
+
+		memc@300 {
+			compatible = "ralink,mt7620a-memc", "ralink,rt3050-memc";
+			reg = <0x300 0x100>;
+		};
+
+		uartlite@c00 {
+			compatible = "ralink,mt7620a-uart", "ralink,rt2880-uart", "ns16550a";
+			reg = <0xc00 0x100>;
+
+			interrupt-parent = <&intc>;
+			interrupts = <12>;
+
+			reg-shift = <2>;
+		};
+	};
+};

arch/mips/ralink/dts/mt7620a_eval.dts

+/dts-v1/;
+
+/include/ "mt7620a.dtsi"
+
+/ {
+	compatible = "ralink,mt7620a-eval-board", "ralink,mt7620a-soc";
+	model = "Ralink MT7620A evaluation board";
+
+	memory@0 {
+		reg = <0x0 0x2000000>;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,57600";
+	};
+};