u-boot/arch/arm/dts/mt7622-rfb.dts

// 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";
};