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/dts-v1/;
#include "sun8i-a33.dtsi"

#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/input/input.h>

/ {
	model = "Test A33";
	compatible = "allwinner,sun8i-a33";

	aliases {
		serial0 = &uart0;
	};

	chosen {
		stdout-path = "serial0:115200n8";
	};
};

&codec {
	status = "okay";
};

&dai {
	status = "okay";
};

&ehci0 {
	status = "okay";
};

&ohci0 {
	status = "okay";
};

&r_rsb {
	status = "okay";

	axp22x: pmic@3a3 {
		compatible = "x-powers,axp223";
		reg = <0x3a3>;
		interrupt-parent = <&nmi_intc>;
		interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
		eldoin-supply = <&reg_dcdc1>;
		swin-supply = <&reg_dcdc1>;
		x-powers,drive-vbus-en;
	};
};

#include "axp223.dtsi"

&ac_power_supply {
	status = "okay";
};

&battery_power_supply {
	status = "okay";
};

&reg_aldo1 {
	regulator-always-on;
	regulator-min-microvolt = <3300000>;
	regulator-max-microvolt = <3300000>;
	regulator-name = "vcc-io";
};

&reg_aldo2 {
	regulator-always-on;
	regulator-min-microvolt = <2350000>;
	regulator-max-microvolt = <2650000>;
	regulator-name = "vdd-dll";
};

&reg_aldo3 {
	regulator-always-on;
	regulator-min-microvolt = <3300000>;
	regulator-max-microvolt = <3300000>;
	regulator-name = "vcc-avcc";
};

&reg_dc1sw {
	regulator-name = "vcc-lcd";
};

&reg_dc5ldo {
	regulator-always-on;
	regulator-min-microvolt = <900000>;
	regulator-max-microvolt = <1400000>;
	regulator-name = "vdd-cpus";
};

&reg_dcdc1 {
	regulator-always-on;
	regulator-min-microvolt = <3000000>;
	regulator-max-microvolt = <3000000>;
	regulator-name = "vcc-3v0";
};

&reg_dcdc2 {
	regulator-always-on;
	regulator-min-microvolt = <900000>;
	regulator-max-microvolt = <1400000>;
	regulator-name = "vdd-sys";
};

&reg_dcdc3 {
	regulator-always-on;
	regulator-min-microvolt = <900000>;
	regulator-max-microvolt = <1400000>;
	regulator-name = "vdd-cpu";
};

&reg_dcdc5 {
	regulator-always-on;
	regulator-min-microvolt = <1500000>;
	regulator-max-microvolt = <1500000>;
	regulator-name = "vcc-dram";
};

&reg_drivevbus {
	regulator-name = "usb0-vbus";
	status = "okay";
};

&reg_rtc_ldo {
	regulator-name = "vcc-rtc";
};

&simplefb_lcd {
	vcc-lcd-supply = <&reg_dc1sw>;
};

&uart0 {
	pinctrl-names = "default";
	pinctrl-0 = <&uart0_pins_b>;
	status = "okay";
};

&usb_otg {
	dr_mode = "otg";
	status = "okay";
};

&usb_power_supply {
	status = "okay";
};

&usbphy {
	usb0_id_det-gpios = <&pio 1 3 GPIO_ACTIVE_HIGH>; /* PB3 */
	usb0_vbus_power-supply = <&usb_power_supply>;
	usb0_vbus-supply = <&reg_drivevbus>;
	status = "okay";
};

&mmc2 {
	pinctrl-names = "default";
	pinctrl-0 = <&mmc2_8bit_pins>;
	vmmc-supply = <&reg_dcdc1>;
	bus-width = <8>;
	non-removable;
	cap-mmc-hw-reset;
	status = "okay";
	reg = <0x01c11000 0x1000>;
	#address-cells = <1>;
	#size-cells = <0>;
};

以下是defconfig：

CONFIG_ARM=y
CONFIG_ARCH_SUNXI=y
CONFIG_SPL=y
CONFIG_MACH_SUN8I_A33=y
CONFIG_DRAM_CLK=432
CONFIG_DRAM_ZQ=15291
CONFIG_DRAM_ODT_EN=y
CONFIG_UART0_PORT_F=y
CONFIG_USB0_VBUS_PIN="AXP0-VBUS-ENABLE"
CONFIG_USB0_VBUS_DET="AXP0-VBUS-DETECT"
CONFIG_USB0_ID_DET="PH9"
CONFIG_AXP_GPIO=y
CONFIG_NR_DRAM_BANKS=1
# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
# CONFIG_CMD_FLASH is not set
# CONFIG_SPL_DOS_PARTITION is not set
# CONFIG_SPL_EFI_PARTITION is not set
CONFIG_DEFAULT_DEVICE_TREE="baji"
CONFIG_USB_MUSB_HOST=y
CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE=y
CONFIG_MMC_SUNXI_SLOT_EXTRA=2
CONFIG_SYS_BOARD="sunxi"

U-Boot 2019.01-rc3 (Jun 20 2023 - 13:38:14 -0700) Allwinner Technology

CPU:   Allwinner A33 (SUN8I 1667)
Model: Test A33
DRAM:  1 GiB
MMC:   
Loading Environment from FAT... In:    serial
Out:   serial
Err:   serial
Net:   No ethernet found.
starting USB...
USB0:   A charger is plugged into the OTG: Port not available.
Hit any key to stop autoboot:  2  1  0 
No MMC device available
No MMC device available
starting USB...
USB0:   A charger is plugged into the OTG: Port not available.
USB is stopped. Please issue 'usb start' first.
starting USB...