arm64: dts: visconti: Add DTS for the VisROBO board

This board consists of two boards:
the SoM board (VRC SoM) with the SoC on board, and the board for I/O (VRB).

The functions of each board supported by this update are as follows:
  - VRC SoM
    - WDT
    - GPIO
    - SDCard (SPI-MMC mode)
    - I2C x1
  - VRB board
    - VRC SoM
    - UART x2
    - Ethernet phy
Signed-off-by: Yuji Ishikawa <yuji2.ishikawa@toshiba.co.jp>
Link: https://lore.kernel.org/r/20211014092703.15251-4-yuji2.ishikawa@toshiba.co.jpSigned-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>

arch/arm64/boot/dts/toshiba/Makefile

 # SPDX-License-Identifier: GPL-2.0
 dtb-$(CONFIG_ARCH_VISCONTI) += tmpv7708-rm-mbrc.dtb
+dtb-$(CONFIG_ARCH_VISCONTI) += tmpv7708-visrobo-vrb.dtb

arch/arm64/boot/dts/toshiba/tmpv7708-visrobo-vrb.dts

+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Device Tree File for TMPV7708 VisROBO VRB board
+ *
+ * (C) Copyright 2020, 2021, Toshiba Corporation.
+ * (C) Copyright 2020, Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
+ */
+
+/dts-v1/;
+
+#include "tmpv7708-visrobo-vrc.dtsi"
+
+/ {
+	model = "Toshiba TMPV7708 VisROBO (VRB) board";
+	compatible = "toshiba,tmpv7708-visrobo-vrb", "toshiba,tmpv7708";
+
+	aliases {
+		serial0 = &uart0;
+		serial1 = &uart1;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	/* 768MB memory */
+	memory@80000000 {
+		device_type = "memory";
+		reg = <0x0 0x80000000 0x0 0x30000000>;
+	};
+};
+
+&uart0 {
+	status = "okay";
+	clocks = <&uart_clk>;
+	clock-names = "apb_pclk";
+};
+
+&uart1 {
+	status = "okay";
+	clocks = <&uart_clk>;
+	clock-names = "apb_pclk";
+};
+
+&piether {
+	status = "okay";
+	phy-handle = <&phy0>;
+	phy-mode = "rgmii-id";
+	clocks = <&clk300mhz>, <&clk125mhz>;
+	clock-names = "stmmaceth", "phy_ref_clk";
+
+	mdio0 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "snps,dwmac-mdio";
+		phy0: ethernet-phy@1 {
+			device_type = "ethernet-phy";
+			reg = <0x1>;
+		};
+	};
+};

arch/arm64/boot/dts/toshiba/tmpv7708-visrobo-vrc.dtsi

+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Device Tree File for TMPV7708 VisROBO VRC SoM
+ *
+ * (C) Copyright 2020, 2021, Toshiba Corporation.
+ * (C) Copyright 2020, Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
+ */
+
+/dts-v1/;
+
+#include "tmpv7708.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+
+&wdt {
+	status = "okay";
+	clocks = <&wdt_clk>;
+};
+
+&gpio {
+	status = "okay";
+};
+
+&spi0_pins {
+	groups = "spi0_grp", "spi0_cs0_grp";
+};
+
+&spi0 {
+	status = "okay";
+	clocks = <&clk300mhz>, <&clk150mhz>;
+	clock-names = "sspclk", "apb_pclk";
+
+	mmc-slot@0 {
+		compatible = "mmc-spi-slot";
+		reg = <0>;
+		gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
+		voltage-ranges = <3200 3400>;
+		spi-max-frequency = <12000000>;
+	};
+};
+
+&i2c0 {
+	status = "okay";
+	clocks = <&clk150mhz>;
+};