MIPS: mscc: Add ocelot dtsi

Add a device tree include file for the Microsemi Ocelot SoC.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Allan Nielsen <Allan.Nielsen@microsemi.com>
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/18855/Signed-off-by: James Hogan <jhogan@kernel.org>

arch/mips/boot/dts/Makefile

@@ -4,6 +4,7 @@ subdir-y	+= cavium-octeon
 subdir-y	+= img
 subdir-y	+= ingenic
 subdir-y	+= lantiq
+subdir-y	+= mscc
 subdir-y	+= mti
 subdir-y	+= netlogic
 subdir-y	+= ni

arch/mips/boot/dts/mscc/Makefile

+obj-y				+= $(patsubst %.dtb, %.dtb.o, $(dtb-y))

arch/mips/boot/dts/mscc/ocelot.dtsi

+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/* Copyright (c) 2017 Microsemi Corporation */
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+	compatible = "mscc,ocelot";
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			compatible = "mips,mips24KEc";
+			device_type = "cpu";
+			clocks = <&cpu_clk>;
+			reg = <0>;
+		};
+	};
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	cpuintc: interrupt-controller {
+		#address-cells = <0>;
+		#interrupt-cells = <1>;
+		interrupt-controller;
+		compatible = "mti,cpu-interrupt-controller";
+	};
+
+	cpu_clk: cpu-clock {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <500000000>;
+	};
+
+	ahb_clk: ahb-clk {
+		compatible = "fixed-factor-clock";
+		#clock-cells = <0>;
+		clocks = <&cpu_clk>;
+		clock-div = <2>;
+		clock-mult = <1>;
+	};
+
+	ahb@70000000 {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0 0x70000000 0x2000000>;
+
+		interrupt-parent = <&intc>;
+
+		cpu_ctrl: syscon@0 {
+			compatible = "mscc,ocelot-cpu-syscon", "syscon";
+			reg = <0x0 0x2c>;
+		};
+
+		intc: interrupt-controller@70 {
+			compatible = "mscc,ocelot-icpu-intr";
+			reg = <0x70 0x70>;
+			#interrupt-cells = <1>;
+			interrupt-controller;
+			interrupt-parent = <&cpuintc>;
+			interrupts = <2>;
+		};
+
+		uart0: serial@100000 {
+			pinctrl-0 = <&uart_pins>;
+			pinctrl-names = "default";
+			compatible = "ns16550a";
+			reg = <0x100000 0x20>;
+			interrupts = <6>;
+			clocks = <&ahb_clk>;
+			reg-io-width = <4>;
+			reg-shift = <2>;
+
+			status = "disabled";
+		};
+
+		uart2: serial@100800 {
+			pinctrl-0 = <&uart2_pins>;
+			pinctrl-names = "default";
+			compatible = "ns16550a";
+			reg = <0x100800 0x20>;
+			interrupts = <7>;
+			clocks = <&ahb_clk>;
+			reg-io-width = <4>;
+			reg-shift = <2>;
+
+			status = "disabled";
+		};
+
+		reset@1070008 {
+			compatible = "mscc,ocelot-chip-reset";
+			reg = <0x1070008 0x4>;
+		};
+
+		gpio: pinctrl@1070034 {
+			compatible = "mscc,ocelot-pinctrl";
+			reg = <0x1070034 0x68>;
+			gpio-controller;
+			#gpio-cells = <2>;
+			gpio-ranges = <&gpio 0 0 22>;
+
+			uart_pins: uart-pins {
+				pins = "GPIO_6", "GPIO_7";
+				function = "uart";
+			};
+
+			uart2_pins: uart2-pins {
+				pins = "GPIO_12", "GPIO_13";
+				function = "uart2";
+			};
+		};
+	};
+};