ARM: rockchip: Add rv1108-elgin-r1 board support

Add the initial support for Elgin R1 board, which is based on the
RV1108 SoC and has the following features currently supported in
U-Boot:

- UART
- eMMC
- USB

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

arch/arm/dts/Makefile

@@ -53,6 +53,7 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += \
 	rk3399-puma-ddr1600.dtb \
 	rk3399-puma-ddr1866.dtb \
 	rk3399-rock960.dtb \
+	rv1108-elgin-r1.dtb \
 	rv1108-evb.dtb
 dtb-$(CONFIG_ARCH_MESON) += \
 	meson-gxbb-nanopi-k2.dtb \

arch/arm/dts/rv1108-elgin-r1.dts

@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2016 Rockchip Electronics Co., Ltd
+ */
+
+/dts-v1/;
+
+#include "rv1108.dtsi"
+
+/ {
+	model = "Elgin RV1108 R1 board";
+	compatible = "elgin,rv1108-elgin", "rockchip,rv1108";
+
+	memory@60000000 {
+		device_type = "memory";
+		reg = <0x60000000 0x08000000>;
+	};
+
+	chosen {
+		stdout-path = "serial2:1500000n8";
+	};
+};
+
+&emmc {
+	pinctrl-names = "default";
+	pinctrl-0 = <&emmc_clk &emmc_cmd &emmc_bus8>;
+	bus-width = <8>;
+	cap-mmc-highspeed;
+	disable-wp;
+	non-removable;
+	status = "okay";
+};
+
+&u2phy {
+	status = "okay";
+
+	u2phy_otg: otg-port {
+		status = "okay";
+	};
+};
+
+&uart2 {
+	status = "okay";
+};
+
+&usb20_otg {
+	status = "okay";
+};