MSCC: Add board support for Servalt SoC family

Add board support, configuration and DTS for Servalt SoC
family. Currently there is one board in this family.

Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>

3 files changed, 206 insertions, 0 deletions

diff --git a/arch/mips/dts/Makefile b/arch/mips/dts/Makefile
index 1484db92c8..af264ff4fb 100644
--- a/arch/mips/dts/Makefile
+++ b/arch/mips/dts/Makefile
@@ -20,6 +20,7 @@ dtb-$(CONFIG_TARGET_JZ4780_CI20) += ci20.dtb
 dtb-$(CONFIG_SOC_LUTON) += luton_pcb090.dtb luton_pcb091.dtb
 dtb-$(CONFIG_SOC_OCELOT) += ocelot_pcb120.dtb ocelot_pcb123.dtb
 dtb-$(CONFIG_SOC_JR2) += jr2_pcb110.dtb jr2_pcb111.dtb serval2_pcb112.dtb
+dtb-$(CONFIG_SOC_SERVALT) += servalt_pcb116.dtb
 
 targets += $(dtb-y)
 
diff --git a/arch/mips/dts/mscc,servalt.dtsi b/arch/mips/dts/mscc,servalt.dtsi
new file mode 100644
index 0000000000..4beb7a38d0
--- /dev/null
+++ b/arch/mips/dts/mscc,servalt.dtsi
@@ -0,0 +1,149 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2018 Microsemi Corporation
+ */
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+	compatible = "mscc,servalt";
+
+	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@0 {
+		#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>;
+	};
+
+	sys_clk: sys-clk {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <250000000>;
+	};
+
+	ahb_clk: ahb-clk {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <250000000>;
+	};
+
+	ahb {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0 0x70000000 0x2000000>;
+
+		interrupt-parent = <&intc>;
+
+		cpu_ctrl: syscon@0 {
+			compatible = "mscc,servalt-cpu-syscon", "syscon";
+			reg = <0x0 0x2c>;
+		};
+
+		intc: interrupt-controller@70 {
+			compatible = "mscc,servalt-icpu-intr";
+			reg = <0x70 0x74>;
+			#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@1010008 {
+			compatible = "mscc,servalt-chip-reset";
+			reg = <0x1010008 0x4>;
+		};
+
+		gpio: pinctrl@1010034 {
+			compatible = "mscc,servalt-pinctrl";
+			reg = <0x1010034 0x90>;
+			gpio-controller;
+			#gpio-cells = <2>;
+			gpio-ranges = <&gpio 0 0 36>;
+
+			sgpio_pins: sgpio-pins {
+				pins = "GPIO_0", "GPIO_1", "GPIO_2", "GPIO_3";
+				function = "sio";
+			};
+
+			uart_pins: uart-pins {
+				pins = "GPIO_6", "GPIO_7";
+				function = "uart";
+			};
+
+			uart2_pins: uart2-pins {
+				pins = "GPIO_20", "GPIO_21";
+				function = "uart2";
+			};
+		};
+
+		spi0: spi-bitbang {
+			compatible = "mscc,luton-bb-spi";
+			status = "okay";
+			reg = <0x50 0x4>;
+			num-chipselects = <1>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+
+		sgpio: gpio@1010120 {
+			compatible = "mscc,ocelot-sgpio";
+			status = "disabled";
+			clocks = <&sys_clk>;
+			pinctrl-0 = <&sgpio_pins>;
+			pinctrl-names = "default";
+			reg = <0x1010120 0x100>;
+			gpio-controller;
+			#gpio-cells = <2>;
+			gpio-ranges = <&sgpio 0 0 128>;
+		};
+	};
+};
diff --git a/arch/mips/dts/servalt_pcb116.dts b/arch/mips/dts/servalt_pcb116.dts
new file mode 100644
index 0000000000..fb3331204b
--- /dev/null
+++ b/arch/mips/dts/servalt_pcb116.dts
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2018 Microsemi Corporation
+ */
+
+/dts-v1/;
+#include "mscc,servalt.dtsi"
+
+/ {
+	model = "ServalT PCB116 Reference Board";
+	compatible = "mscc,servalt-pcb116", "mscc,servalt";
+
+	aliases {
+		spi0 = &spi0;
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		status_green {
+			label = "pcb116:green:status";
+			gpios = <&sgpio 70 0>; /* p6.2 */
+			default-state = "on";
+		};
+
+		status_red {
+			label = "pcb116:red:status";
+			gpios = <&sgpio 102 0>; /* p6.3 */
+			default-state = "off";
+		};
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&spi0 {
+	status = "okay";
+	spi-flash@0 {
+		compatible = "spi-flash";
+		spi-max-frequency = <18000000>; /* input clock */
+		reg = <0>; /* CS0 */
+		spi-cs-high;
+	};
+};
+
+&sgpio {
+	status = "okay";
+	sgpio-ports = <0x0000fe7f>;
+};