u-boot/arch/arm/dts/o4-imx-nano.dts

// SPDX-License-Identifier: GPL-2.0+
// Copyright (C) 2021 Oleh Kravchenko <oleg@kaa.org.ua>

/dts-v1/;

#include <dt-bindings/leds/common.h>

#include "o4-imx6ull-nano.dtsi"

/ {
	model = "O4-iMX-NANO";
	compatible = "out4,o4-imx-nano",
		     "out4,o4-imx6ull-nano",
		     "fsl,imx6ull";

	aliases {
		mmc1 = &usdhc1;
	};

	chosen {
		stdout-path = &uart1;
	};

	leds {
		compatible = "gpio-leds";

		led@0 {
			color = <LED_COLOR_ID_RED>;
			gpios = <&pcf8574a 0 GPIO_ACTIVE_LOW>;
			reg = <0>;
		};

		led@1 {
			color = <LED_COLOR_ID_GREEN>;
			gpios = <&pcf8574a 1 GPIO_ACTIVE_LOW>;
			reg = <1>;
		};

		led@2 {
			gpios = <&pcf8574a 2 GPIO_ACTIVE_LOW>;
			color = <LED_COLOR_ID_BLUE>;
			reg = <2>;
		};

		led@3 {
			color = <LED_COLOR_ID_RED>;
			gpios = <&pcf8574a 3 GPIO_ACTIVE_LOW>;
			reg = <3>;
		};

		led@4 {
			color = <LED_COLOR_ID_GREEN>;
			gpios = <&pcf8574a 4 GPIO_ACTIVE_LOW>;
			reg = <4>;
		};

		led@5 {
			color = <LED_COLOR_ID_BLUE>;
			gpios = <&pcf8574a 5 GPIO_ACTIVE_LOW>;
			reg = <5>;
		};
	};

	usbotg1_vbus: reg_usbotg1_vbus {
		compatible = "regulator-fixed";
		enable-active-high;
		gpio = <&pcf8574a 6 GPIO_ACTIVE_HIGH>;
		regulator-max-microvolt = <5000000>;
		regulator-min-microvolt = <5000000>;
		regulator-name = "usb0";
	};

	usbotg2_vbus: reg_usbotg2_vbus {
		compatible = "regulator-fixed";
		enable-active-high;
		gpio = <&pcf8574a 7 GPIO_ACTIVE_HIGH>;
		regulator-max-microvolt = <5000000>;
		regulator-min-microvolt = <5000000>;
		regulator-name = "usb1";
	};
};

&iomuxc {
	pinctrl_uart1: uart1grp {
		fsl,pins = <
			MX6UL_PAD_UART1_RX_DATA__UART1_DCE_RX	0x1b0b1
			MX6UL_PAD_UART1_TX_DATA__UART1_DCE_TX	0x1b0b1
		>;
	};

	pinctrl_usdhc1: usdhc1grp {
		fsl,pins = <
			MX6UL_PAD_SD1_CLK__USDHC1_CLK		0x10069
			MX6UL_PAD_SD1_CMD__USDHC1_CMD		0x17059
			MX6UL_PAD_SD1_DATA0__USDHC1_DATA0	0x17059
			MX6UL_PAD_SD1_DATA1__USDHC1_DATA1	0x17059
			MX6UL_PAD_SD1_DATA2__USDHC1_DATA2	0x17059
			MX6UL_PAD_SD1_DATA3__USDHC1_DATA3	0x17059
			MX6UL_PAD_UART1_RTS_B__USDHC1_CD_B	0x03029
		>;
	};

	pinctrl_mdio: mdiogrp {
		fsl,pins = <
			MX6UL_PAD_GPIO1_IO06__ENET2_MDIO	0x1b0b0
			MX6UL_PAD_GPIO1_IO07__ENET2_MDC		0x1b0b0
			MX6UL_PAD_SNVS_TAMPER1__GPIO5_IO01	0xb0b0 /* RST */
		>;
	};

	pinctrl_i2c2: i2c2grp {
		fsl,pins = <
			MX6UL_PAD_CSI_HSYNC__I2C2_SCL	0x4001b8b0
			MX6UL_PAD_CSI_VSYNC__I2C2_SDA	0x4001b8b0
		>;
	};

	pinctrl_i2c2_gpio: i2c2gpiogrp {
		fsl,pins = <
			MX6UL_PAD_CSI_HSYNC__GPIO4_IO20	0x1b8b0
			MX6UL_PAD_CSI_VSYNC__GPIO4_IO19	0x1b8b0
		>;
	};

	pinctrl_can1: can1grp {
		fsl,pins = <
			MX6UL_PAD_LCD_DATA08__FLEXCAN1_TX	0x1b020
			MX6UL_PAD_LCD_DATA09__FLEXCAN1_RX	0x1b020
		>;
	};

	pinctrl_uart2: uart2grp {
		fsl,pins = <
			MX6UL_PAD_UART2_RX_DATA__UART2_DCE_RX	0x1b0b1
			MX6UL_PAD_UART2_TX_DATA__UART2_DCE_TX	0x1b0b1
			MX6UL_PAD_UART2_CTS_B__UART2_DCE_CTS	0x1b0b1
		>;
	};
};

&uart1 {
	pinctrl-0 = <&pinctrl_uart1>;
	pinctrl-names = "default";
	status = "okay";
};

&usdhc1 {
	bus-width = <4>;
	no-1-8-v;
	pinctrl-0 = <&pinctrl_usdhc1>;
	pinctrl-names = "default";
	status = "okay";
	wakeup-source;
};

&fec1 {
	phy-handle = <&phy0>;
	phy-mode = "rmii";
	pinctrl-0 = <&pinctrl_fec1>;
	pinctrl-names = "default";
	status = "okay";
};

&fec2 {
	phy-handle = <&phy1>;
	phy-mode = "rmii";
	phy-reset-duration = <250>;
	phy-reset-post-delay = <100>;
	phy-reset-gpios = <&gpio5 1 GPIO_ACTIVE_LOW>;
	pinctrl-0 = <&pinctrl_fec2 &pinctrl_mdio>;
	pinctrl-names = "default";
	status = "okay";

	mdio {
		#address-cells = <1>;
		#size-cells = <0>;

		phy0: ethernet-phy@0 {
			clocks = <&clks IMX6UL_CLK_ENET_REF>;
			clock-names = "rmii-ref";
			interrupt-parent = <&gpio5>;
			interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
			pinctrl-0 = <&pinctrl_phy0_irq>;
			pinctrl-names = "default";
			reg = <0>;
		};

		phy1: ethernet-phy@1 {
			clocks = <&clks IMX6UL_CLK_ENET2_REF>;
			clock-names = "rmii-ref";
			interrupt-parent = <&gpio5>;
			interrupts = <3 IRQ_TYPE_EDGE_FALLING>;
			pinctrl-0 = <&pinctrl_phy1_irq>;
			pinctrl-names = "default";
			reg = <1>;
		};
	};
};

&usbotg1 {
	dr_mode = "host";
	status = "okay";
	vbus-supply = <&usbotg1_vbus>;
};

&usbotg2 {
	dr_mode = "host";
	status = "okay";
	vbus-supply = <&usbotg2_vbus>;
};

&i2c2 {
	clock_frequency = <100000>;
	pinctrl-0 = <&pinctrl_i2c2>;
	pinctrl-1 = <&pinctrl_i2c2_gpio>;
	pinctrl-names = "default", "gpio";
	scl-gpios = <&gpio4 20 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
	sda-gpios = <&gpio4 19 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
	status = "okay";

	pcf8574a: gpio@38 {
		compatible = "nxp,pcf8574a";
		#gpio-cells = <2>;
		gpio-controller;
		reg = <0x38>;
	};
};

&can1 {
	pinctrl-names = "default";
	pinctrl-0 = <&pinctrl_can1>;
	status = "okay";
};

&uart2 {
	linux,rs485-enabled-at-boot-time;
	pinctrl-0 = <&pinctrl_uart2>;
	pinctrl-names = "default";
	status = "okay";
	uart-has-rtscts;
};