MIPS: mscc: Add luton dtsi

Add a device tree include file for the Microsemi Luton SoC which
belongs to same family of the Ocelot SoC.

It is based on the work of Lars Povlsen <lars.povlsen@microchip.com>.

Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

diff --git a/arch/mips/boot/dts/mscc/luton.dtsi b/arch/mips/boot/dts/mscc/luton.dtsi
new file mode 100644 (file)
index 0000000..2a170b8
--- /dev/null
+++ b/arch/mips/boot/dts/mscc/luton.dtsi
@@ -0,0 +1,116 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/* Copyright (c) 2020 Microsemi Corporation */
+
+/ {
+       #address-cells = <1>;
+       #size-cells = <1>;
+       compatible = "mscc,luton";
+
+       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 = <416666666>;
+       };
+
+       ahb_clk: ahb-clk {
+               compatible = "fixed-factor-clock";
+               #clock-cells = <0>;
+               clocks = <&cpu_clk>;
+               clock-div = <2>;
+               clock-mult = <1>;
+       };
+
+       ahb@60000000 {
+               compatible = "simple-bus";
+               #address-cells = <1>;
+               #size-cells = <1>;
+               ranges = <0 0x60000000 0x20000000>;
+
+               interrupt-parent = <&intc>;
+
+               cpu_ctrl: syscon@10000000 {
+                       compatible = "mscc,ocelot-cpu-syscon", "syscon";
+                       reg = <0x10000000 0x2c>;
+               };
+
+               intc: interrupt-controller@10000084 {
+                       compatible = "mscc,luton-icpu-intr";
+                       reg = <0x10000084 0x70>;
+                       #interrupt-cells = <1>;
+                       interrupt-controller;
+                       interrupt-parent = <&cpuintc>;
+                       interrupts = <2>;
+               };
+
+               uart0: serial@10100000 {
+                       pinctrl-0 = <&uart_pins>;
+                       pinctrl-names = "default";
+                       compatible = "ns16550a";
+                       reg = <0x10100000 0x20>;
+                       interrupts = <6>;
+                       clocks = <&ahb_clk>;
+                       reg-io-width = <4>;
+                       reg-shift = <2>;
+
+                       status = "disabled";
+               };
+
+               i2c0: i2c@10100400 {
+                       compatible = "mscc,ocelot-i2c", "snps,designware-i2c";
+                       pinctrl-0 = <&i2c_pins>;
+                       pinctrl-names = "default";
+                       reg = <0x10100400 0x100>, <0x100002a4 0x8>;
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+                       interrupts = <11>;
+                       clocks = <&ahb_clk>;
+
+                       status = "disabled";
+               };
+
+               gpio: pinctrl@70068 {
+                       compatible = "mscc,luton-pinctrl";
+                       reg = <0x70068 0x28>;
+                       gpio-controller;
+                       #gpio-cells = <2>;
+                       gpio-ranges = <&gpio 0 0 32>;
+                       interrupt-controller;
+                       interrupts = <13>;
+                       #interrupt-cells = <2>;
+
+                       i2c_pins: i2c-pins {
+                               pins = "GPIO_5", "GPIO_6";
+                               function = "twi";
+                       };
+
+                       uart_pins: uart-pins {
+                               pins = "GPIO_30", "GPIO_31";
+                               function = "uart";
+                       };
+
+               };
+       };
+};