u-boot-brain/arch/arm/dts/k3-am642-evm.dts

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2020-2021 Texas Instruments Incorporated - https://www.ti.com/
 */

/dts-v1/;

#include <dt-bindings/leds/common.h>
#include "k3-am642.dtsi"

/ {
	compatible =  "ti,am642-evm", "ti,am642";
	model = "Texas Instruments AM642 EVM";

	chosen {
		stdout-path = "serial2:115200n8";
		bootargs = "console=ttyS2,115200n8 earlycon=ns16550a,mmio32,0x02800000";
	};

	memory@80000000 {
		device_type = "memory";
		/* 2G RAM */
		reg = <0x00000000 0x80000000 0x00000000 0x80000000>;

	};

	reserved-memory {
		#address-cells = <2>;
		#size-cells = <2>;
		ranges;

		secure_ddr: optee@9e800000 {
			reg = <0x00 0x9e800000 0x00 0x01800000>; /* for OP-TEE */
			alignment = <0x1000>;
			no-map;
		};
	};

	evm_12v0: fixedregulator-evm12v0 {
		/* main DC jack */
		compatible = "regulator-fixed";
		regulator-name = "evm_12v0";
		regulator-min-microvolt = <12000000>;
		regulator-max-microvolt = <12000000>;
		regulator-always-on;
		regulator-boot-on;
	};

	vsys_5v0: fixedregulator-vsys5v0 {
		/* output of LM5140 */
		compatible = "regulator-fixed";
		regulator-name = "vsys_5v0";
		regulator-min-microvolt = <5000000>;
		regulator-max-microvolt = <5000000>;
		vin-supply = <&evm_12v0>;
		regulator-always-on;
		regulator-boot-on;
	};

	vsys_3v3: fixedregulator-vsys3v3 {
		/* output of LM5140 */
		compatible = "regulator-fixed";
		regulator-name = "vsys_3v3";
		regulator-min-microvolt = <3300000>;
		regulator-max-microvolt = <3300000>;
		vin-supply = <&evm_12v0>;
		regulator-always-on;
		regulator-boot-on;
	};

	vdd_mmc1: fixed-regulator-sd {
		/* TPS2051BD */
		compatible = "regulator-fixed";
		regulator-name = "vdd_mmc1";
		regulator-min-microvolt = <3300000>;
		regulator-max-microvolt = <3300000>;
		regulator-boot-on;
		enable-active-high;
		vin-supply = <&vsys_3v3>;
		gpio = <&exp1 6 GPIO_ACTIVE_HIGH>;
	};

	vddb: fixedregulator-vddb {
		compatible = "regulator-fixed";
		regulator-name = "vddb_3v3_display";
		regulator-min-microvolt = <3300000>;
		regulator-max-microvolt = <3300000>;
		vin-supply = <&vsys_3v3>;
		regulator-always-on;
		regulator-boot-on;
	};

	leds {
		compatible = "gpio-leds";

		led-0 {
			label = "am64-evm:red:heartbeat";
			gpios = <&exp1 16 GPIO_ACTIVE_HIGH>;
			linux,default-trigger = "heartbeat";
			function = LED_FUNCTION_HEARTBEAT;
			default-state = "off";
		};
	};
};

&main_pmx0 {
	main_mmc1_pins_default: main-mmc1-pins-default {
		pinctrl-single,pins = <
			AM64X_IOPAD(0x0294, PIN_INPUT_PULLUP, 0) /* (J19) MMC1_CMD */
			AM64X_IOPAD(0x028c, PIN_INPUT_PULLDOWN, 0) /* (L20) MMC1_CLK */
			AM64X_IOPAD(0x0288, PIN_INPUT_PULLUP, 0) /* (K21) MMC1_DAT0 */
			AM64X_IOPAD(0x0284, PIN_INPUT_PULLUP, 0) /* (L21) MMC1_DAT1 */
			AM64X_IOPAD(0x0280, PIN_INPUT_PULLUP, 0) /* (K19) MMC1_DAT2 */
			AM64X_IOPAD(0x027c, PIN_INPUT_PULLUP, 0) /* (K18) MMC1_DAT3 */
			AM64X_IOPAD(0x0298, PIN_INPUT_PULLUP, 0) /* (D19) MMC1_SDCD */
			AM64X_IOPAD(0x029c, PIN_INPUT, 0) /* (C20) MMC1_SDWP */
			AM64X_IOPAD(0x0290, PIN_INPUT, 0) /* MMC1_CLKLB */
		>;
	};

	main_uart0_pins_default: main-uart0-pins-default {
		pinctrl-single,pins = <
			AM64X_IOPAD(0x0238, PIN_INPUT, 0) /* (B16) UART0_CTSn */
			AM64X_IOPAD(0x023c, PIN_OUTPUT, 0) /* (A16) UART0_RTSn */
			AM64X_IOPAD(0x0230, PIN_INPUT, 0) /* (D15) UART0_RXD */
			AM64X_IOPAD(0x0234, PIN_OUTPUT, 0) /* (C16) UART0_TXD */
		>;
	};

	main_i2c1_pins_default: main-i2c1-pins-default {
		pinctrl-single,pins = <
			AM64X_IOPAD(0x0268, PIN_INPUT_PULLUP, 0) /* (C18) I2C1_SCL */
			AM64X_IOPAD(0x026c, PIN_INPUT_PULLUP, 0) /* (B19) I2C1_SDA */
		>;
	};
};

&main_uart0 {
	pinctrl-names = "default";
	pinctrl-0 = <&main_uart0_pins_default>;
};

/* main_uart1 is reserved for firmware usage */
&main_uart1 {
	status = "reserved";
};

&main_uart2 {
	status = "disabled";
};

&main_uart3 {
	status = "disabled";
};

&main_uart4 {
	status = "disabled";
};

&main_uart5 {
	status = "disabled";
};

&main_uart6 {
	status = "disabled";
};

&mcu_uart0 {
	status = "disabled";
};

&mcu_uart1 {
	status = "disabled";
};

&main_i2c1 {
	pinctrl-names = "default";
	pinctrl-0 = <&main_i2c1_pins_default>;
	clock-frequency = <400000>;

	exp1: gpio@22 {
		compatible = "ti,tca6424";
		reg = <0x22>;
		gpio-controller;
		#gpio-cells = <2>;
		gpio-line-names = "GPIO_eMMC_RSTn", "CAN_MUX_SEL",
				  "GPIO_CPSW1_RST", "GPIO_RGMII1_RST",
				  "GPIO_RGMII2_RST", "GPIO_PCIe_RST_OUT",
				  "MMC1_SD_EN", "FSI_FET_SEL",
				  "MCAN0_STB_3V3", "MCAN1_STB_3V3",
				  "CPSW_FET_SEL", "CPSW_FET2_SEL",
				  "PRG1_RGMII2_FET_SEL", "TEST_GPIO2",
				  "GPIO_OLED_RESETn", "VPP_LDO_EN",
				  "TEST_LED1", "TP92", "TP90", "TP88",
				  "TP87", "TP86", "TP89", "TP91";
	};

	/* osd9616p0899-10 */
	display@3c {
		compatible = "solomon,ssd1306fb-i2c";
		reg = <0x3c>;
		reset-gpios = <&exp1 14 GPIO_ACTIVE_LOW>;
		vbat-supply = <&vddb>;
		solomon,height = <16>;
		solomon,width = <96>;
		solomon,com-seq;
		solomon,com-invdir;
		solomon,page-offset = <0>;
		solomon,prechargep1 = <2>;
		solomon,prechargep2 = <13>;
	};
};

&mcu_i2c0 {
	status = "disabled";
};

&mcu_i2c1 {
	status = "disabled";
};

&mcu_spi0 {
	status = "disabled";
};

&mcu_spi1 {
	status = "disabled";
};

&sdhci0 {
	/* emmc */
	bus-width = <8>;
	non-removable;
	ti,driver-strength-ohm = <50>;
	disable-wp;
};

&sdhci1 {
	/* SD/MMC */
	vmmc-supply = <&vdd_mmc1>;
	pinctrl-names = "default";
	bus-width = <4>;
	pinctrl-0 = <&main_mmc1_pins_default>;
	ti,driver-strength-ohm = <50>;
	disable-wp;
};