u-boot-brain/arch/arm/dts/imx6qdl-aristainetos2-u-boot.dtsi

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2019 Heiko Schocher <hs@denx.de>
 */

/ {
	chosen {
		u-boot,dm-pre-reloc;
		stdout-path = &uart2;
	};

	wdt-reboot {
		compatible = "wdt-reboot";
		wdt = <&wdog1>;
	};
};

&uart2 {
	u-boot,dm-pre-reloc;
};

&pinctrl_gpio {
	u-boot,dm-pre-reloc;
};

&pinctrl_uart2 {
	u-boot,dm-pre-reloc;
};

&aips2 {
	u-boot,dm-pre-reloc;
};

&backlight {
	pwms = <&pwm1 0 300000>;
	default-brightness-level = <2>;
};

/*
 * allow switching write protect pin by gpio,
 * because "pinctrl-assert-gpios" from &ecspi1 isn't handled by u-boot
 */
&gpio2 {
	u-boot,dm-pre-reloc;

	wp_spi_nor {
		gpio-hog;
		output-high;
		gpios = <15 GPIO_ACTIVE_HIGH>;
	};
};

&iomuxc {
	pinctrl-0 = <&pinctrl_gpio &pinctrl_gpio_fix>;
	u-boot,dm-pre-reloc;

	pinctrl_gpio_fix: gpiofixgrp {
		/*
		 * usdhc2 has a levelshifter on the carrier board Rev. DV1,
		 * that will automatically detect the driving direction.
		 * During initialisation this isn't working correctly,
		 * which causes DAT3 to be driven low towards the SD-card.
		 * This causes a SD-card enetring the SPI-Mode
		 * and therefore getting inaccessible until next power cycle.
		 * As workaround we drive the DAT3 line as GPIO and set it high.
		 * This makes usdhc2 unusable in u-boot, but works for the
		 * initialisation in Linux
		 */
		fsl,pins = <
			MX6QDL_PAD_SD2_DAT3__GPIO1_IO12	0x20000
		>;
	};
};

&gpio1 {
	usdhc_fix {
		gpio-hog;
		output-high;
		gpios = <12 GPIO_ACTIVE_HIGH>;
	};
};

&gpio3 {
	u-boot,dm-pre-reloc;
};

&gpio5 {
	u-boot,dm-pre-reloc;
};

&ecspi4 {
	u-boot,dm-pre-reloc;
};

&flash {
	u-boot,dm-pre-reloc;
};

&pinctrl_ecspi4 {
	u-boot,dm-pre-reloc;
};