Add support for MT7622 reference board

This adds a general board file based on MT7622 SoCs from MediaTek.
This commit is adding the basic boot support for the MT7622 rfb.

Signed-off-by: Sam Shih <sam.shih@mediatek.com>
Reviewed-by: Ryder Lee <ryder.lee@mediatek.com>
Tested-by: Frank Wunderlich <frank-w@public-files.de>

1 files changed, 180 insertions, 0 deletions

diff --git a/arch/arm/dts/mt7622-rfb.dts b/arch/arm/dts/mt7622-rfb.dts
new file mode 100644
index 0000000000..ec30f5c6eb
--- /dev/null
+++ b/arch/arm/dts/mt7622-rfb.dts
@@ -0,0 +1,180 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2019 MediaTek Inc.
+ * Author: Sam Shih <sam.shih@mediatek.com>
+ */
+
+/dts-v1/;
+#include "mt7622.dtsi"
+#include "mt7622-u-boot.dtsi"
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+	model = "mt7622-rfb";
+	compatible = "mediatek,mt7622", "mediatek,mt7622-rfb";
+	chosen {
+		stdout-path = &uart0;
+		tick-timer = &timer0;
+	};
+
+	aliases {
+		spi0 = &snfi;
+	};
+
+	memory@40000000 {
+		device_type = "memory";
+		reg = <0x40000000 0x10000000>;
+	};
+
+	reg_1p8v: regulator-1p8v {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-1.8V";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+	reg_3p3v: regulator-3p3v {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-3.3V";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+};
+
+
+&pinctrl {
+	snfi_pins: snfi-pins {
+		mux {
+			function = "flash";
+			groups = "snfi";
+		};
+	};
+
+	snor_pins: snor-pins {
+		mux {
+			function = "flash";
+			groups = "spi_nor";
+		};
+	};
+
+	uart0_pins: uart0 {
+		mux {
+			function = "uart";
+			groups = "uart0_0_tx_rx" ;
+		};
+	};
+
+	watchdog_pins: watchdog-default {
+		mux {
+			function = "watchdog";
+			groups = "watchdog";
+		};
+	};
+
+	mmc0_pins_default: mmc0default {
+		mux {
+			function = "emmc";
+			groups =  "emmc";
+		};
+
+		/* "NDL0","NDL1","NDL2","NDL3","NDL4","NDL5","NDL6","NDL7",
+		 * "NRB","NCLE" pins are used as DAT0,DAT1,DAT2,DAT3,DAT4,
+		 * DAT5,DAT6,DAT7,CMD,CLK for eMMC respectively
+		 */
+		conf-cmd-dat {
+			pins = "NDL0", "NDL1", "NDL2",
+			       "NDL3", "NDL4", "NDL5",
+			       "NDL6", "NDL7", "NRB";
+			input-enable;
+			bias-pull-up;
+		};
+
+		conf-clk {
+			pins = "NCLE";
+			bias-pull-down;
+		};
+
+	};
+
+	mmc1_pins_default: mmc1default {
+		mux {
+			function = "sd";
+			groups =  "sd_0";
+		};
+		/* "I2S2_OUT, "I2S4_IN"", "I2S3_IN", "I2S2_IN",
+		 *  "I2S4_OUT", "I2S3_OUT" are used as DAT0, DAT1,
+		 *  DAT2, DAT3, CMD, CLK for SD respectively.
+		 */
+		conf-cmd-data {
+			pins = "I2S2_OUT", "I2S4_IN", "I2S3_IN",
+			       "I2S2_IN","I2S4_OUT";
+			input-enable;
+			drive-strength = <8>;
+			bias-pull-up;
+		};
+		conf-clk {
+			pins = "I2S3_OUT";
+			drive-strength = <12>;
+			bias-pull-down;
+		};
+		conf-cd {
+			pins = "TXD3";
+			bias-pull-up;
+		};
+
+	};
+};
+
+&snfi {
+	pinctrl-names = "default", "snfi";
+	pinctrl-0 = <&snor_pins>;
+	pinctrl-1 = <&snfi_pins>;
+	status = "okay";
+
+	spi-flash@0{
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		u-boot,dm-pre-reloc;
+	};
+};
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_pins>;
+	status = "okay";
+};
+
+&mmc0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc0_pins_default>;
+	status = "okay";
+	bus-width = <8>;
+	max-frequency = <50000000>;
+	cap-sd-highspeed;
+	vmmc-supply = <&reg_3p3v>;
+	vqmmc-supply = <&reg_3p3v>;
+	non-removable;
+};
+
+&mmc1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc1_pins_default>;
+	status = "okay";
+	bus-width = <4>;
+	max-frequency = <50000000>;
+	cap-sd-highspeed;
+	r_smpl = <1>;
+	vmmc-supply = <&reg_3p3v>;
+	vqmmc-supply = <&reg_3p3v>;
+};
+
+&watchdog {
+	pinctrl-names = "default";
+	pinctrl-0 = <&watchdog_pins>;
+	status = "okay";
+};