arm: imx: Add support for Google's Coral Dev Board

Add initial support for Google's Coral Dev Board based on i.MX8MQ.

https://coral.ai/products/dev-board

The Phanbell naming has been used here to match the naming convention
used in Google's U-Boot source tree:

https://coral.googlesource.com/uboot-imx/

Co-developed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Alifer Moraes <alifer.wsdm@gmail.com>
Tested-by: Marco Franchi <marcofrk@gmail.com>

arch/arm/dts/Makefile

@@ -733,6 +733,7 @@ dtb-$(CONFIG_ARCH_IMX8M) += \
 	imx8mm-verdin.dtb \
 	imx8mn-ddr4-evk.dtb \
 	imx8mq-evk.dtb \
+	imx8mq-phanbell.dtb \
 	imx8mp-evk.dtb
 
 dtb-$(CONFIG_ARCH_IMXRT) += imxrt1050-evk.dtb \

arch/arm/dts/imx8mq-phanbell.dts

@@ -0,0 +1,417 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright 2020 NXP
+ */
+
+/dts-v1/;
+
+#include "imx8mq.dtsi"
+
+/ {
+	model = "Google i.MX8MQ Phanbell";
+	compatible = "google,imx8mq-phanbell", "fsl,imx8mq";
+
+	chosen {
+		stdout-path = &uart1;
+	};
+
+	memory@40000000 {
+		device_type = "memory";
+		reg = <0x00000000 0x40000000 0 0x40000000>;
+	};
+
+	pmic_osc: clock-pmic {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <32768>;
+		clock-output-names = "pmic_osc";
+	};
+
+	reg_usdhc2_vmmc: regulator-usdhc2-vmmc {
+		compatible = "regulator-fixed";
+		regulator-name = "VSD_3V3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&gpio2 19 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+};
+
+&A53_0 {
+	cpu-supply = <&buck2>;
+};
+
+&A53_1 {
+	cpu-supply = <&buck2>;
+};
+
+&A53_2 {
+	cpu-supply = <&buck2>;
+};
+
+&A53_3 {
+	cpu-supply = <&buck2>;
+};
+
+&i2c1 {
+	clock-frequency = <400000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c1>;
+	status = "okay";
+
+	pmic: pmic@4b {
+		compatible = "rohm,bd71837";
+		reg = <0x4b>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_pmic>;
+		#clock-cells = <0>;
+		clocks = <&pmic_osc>;
+		clock-output-names = "pmic_clk";
+		interrupt-parent = <&gpio1>;
+		interrupts = <3 GPIO_ACTIVE_LOW>;
+
+		regulators {
+			buck1: BUCK1 {
+				regulator-name = "buck1";
+				regulator-min-microvolt = <700000>;
+				regulator-max-microvolt = <1300000>;
+				regulator-boot-on;
+				regulator-always-on;
+				regulator-ramp-delay = <1250>;
+				rohm,dvs-run-voltage = <900000>;
+				rohm,dvs-idle-voltage = <900000>;
+				rohm,dvs-suspend-voltage = <800000>;
+			};
+
+			buck2: BUCK2 {
+				regulator-name = "buck2";
+				regulator-min-microvolt = <850000>;
+				regulator-max-microvolt = <1000000>;
+				regulator-boot-on;
+				regulator-always-on;
+				rohm,dvs-run-voltage = <1000000>;
+				rohm,dvs-idle-voltage = <900000>;
+			};
+
+			buck3: BUCK3 {
+				regulator-name = "buck3";
+				regulator-min-microvolt = <700000>;
+				regulator-max-microvolt = <1300000>;
+				regulator-boot-on;
+				rohm,dvs-run-voltage = <900000>;
+			};
+
+			buck4: BUCK4 {
+				regulator-name = "buck4";
+				regulator-min-microvolt = <700000>;
+				regulator-max-microvolt = <1300000>;
+				regulator-boot-on;
+				regulator-always-on;
+				rohm,dvs-run-voltage = <900000>;
+			};
+
+			buck5: BUCK5 {
+				regulator-name = "buck5";
+				regulator-min-microvolt = <700000>;
+				regulator-max-microvolt = <1350000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			buck6: BUCK6 {
+				regulator-name = "buck6";
+				regulator-min-microvolt = <3000000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			buck7: BUCK7 {
+				regulator-name = "buck7";
+				regulator-min-microvolt = <1605000>;
+				regulator-max-microvolt = <1995000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			buck8: BUCK8 {
+				regulator-name = "buck8";
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <1400000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo1: LDO1 {
+				regulator-name = "ldo1";
+				regulator-min-microvolt = <3000000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo2: LDO2 {
+				regulator-name = "ldo2";
+				regulator-min-microvolt = <900000>;
+				regulator-max-microvolt = <900000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo3: LDO3 {
+				regulator-name = "ldo3";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo4: LDO4 {
+				regulator-name = "ldo4";
+				regulator-min-microvolt = <900000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo5: LDO5 {
+				regulator-name = "ldo5";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo6: LDO6 {
+				regulator-name = "ldo6";
+				regulator-min-microvolt = <900000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo7: LDO7 {
+				regulator-name = "ldo7";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+		};
+	};
+};
+
+&fec1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_fec1>;
+	phy-mode = "rgmii-id";
+	phy-handle = <&ethphy0>;
+	phy-reset-gpios = <&gpio1 9 GPIO_ACTIVE_LOW>;
+	phy-reset-duration = <10>;
+	phy-reset-post-delay = <50>;
+	fsl,magic-packet;
+	status = "okay";
+
+	mdio {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		ethphy0: ethernet-phy@0 {
+			compatible = "ethernet-phy-ieee802.3-c22";
+			reg = <0>;
+		};
+	};
+};
+
+&uart1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_uart1>;
+	status = "okay";
+};
+
+&usdhc1 {
+	pinctrl-names = "default", "state_100mhz", "state_200mhz";
+	pinctrl-0 = <&pinctrl_usdhc1>;
+	pinctrl-1 = <&pinctrl_usdhc1_100mhz>;
+	pinctrl-2 = <&pinctrl_usdhc1_200mhz>;
+	bus-width = <8>;
+	non-removable;
+	status = "okay";
+};
+
+&usdhc2 {
+	pinctrl-names = "default", "state_100mhz", "state_200mhz";
+	pinctrl-0 = <&pinctrl_usdhc2>, <&pinctrl_usdhc2_gpio>;
+	pinctrl-1 = <&pinctrl_usdhc2_100mhz>, <&pinctrl_usdhc2_gpio>;
+	pinctrl-2 = <&pinctrl_usdhc2_200mhz>, <&pinctrl_usdhc2_gpio>;
+	bus-width = <4>;
+	cd-gpios = <&gpio2 12 GPIO_ACTIVE_LOW>;
+	vmmc-supply = <&reg_usdhc2_vmmc>;
+	status = "okay";
+};
+
+&usb3_phy0 {
+	status = "okay";
+};
+
+&usb_dwc3_0 {
+	dr_mode = "otg";
+	status = "okay";
+};
+
+&usb3_phy1 {
+	status = "okay";
+};
+
+&usb_dwc3_1 {
+	dr_mode = "host";
+	status = "okay";
+};
+
+&wdog1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_wdog>;
+	fsl,ext-reset-output;
+	status = "okay";
+};
+
+&iomuxc {
+	pinctrl_fec1: fec1grp {
+		fsl,pins = <
+			MX8MQ_IOMUXC_ENET_MDC_ENET1_MDC			0x3
+			MX8MQ_IOMUXC_ENET_MDIO_ENET1_MDIO		0x23
+			MX8MQ_IOMUXC_ENET_TD3_ENET1_RGMII_TD3		0x1f
+			MX8MQ_IOMUXC_ENET_TD2_ENET1_RGMII_TD2		0x1f
+			MX8MQ_IOMUXC_ENET_TD1_ENET1_RGMII_TD1		0x1f
+			MX8MQ_IOMUXC_ENET_TD0_ENET1_RGMII_TD0		0x1f
+			MX8MQ_IOMUXC_ENET_RD3_ENET1_RGMII_RD3		0x91
+			MX8MQ_IOMUXC_ENET_RD2_ENET1_RGMII_RD2		0x91
+			MX8MQ_IOMUXC_ENET_RD1_ENET1_RGMII_RD1		0x91
+			MX8MQ_IOMUXC_ENET_RD0_ENET1_RGMII_RD0		0x91
+			MX8MQ_IOMUXC_ENET_TXC_ENET1_RGMII_TXC		0x1f
+			MX8MQ_IOMUXC_ENET_RXC_ENET1_RGMII_RXC		0x91
+			MX8MQ_IOMUXC_ENET_RX_CTL_ENET1_RGMII_RX_CTL	0x91
+			MX8MQ_IOMUXC_ENET_TX_CTL_ENET1_RGMII_TX_CTL	0x1f
+			MX8MQ_IOMUXC_GPIO1_IO09_GPIO1_IO9		0x19
+		>;
+	};
+
+	pinctrl_i2c1: i2c1grp {
+		fsl,pins = <
+			MX8MQ_IOMUXC_I2C1_SCL_I2C1_SCL			0x4000007f
+			MX8MQ_IOMUXC_I2C1_SDA_I2C1_SDA			0x4000007f
+		>;
+	};
+
+	pinctrl_pmic: pmicirq {
+		fsl,pins = <
+			MX8MQ_IOMUXC_GPIO1_IO03_GPIO1_IO3	0x41
+		>;
+	};
+
+	pinctrl_uart1: uart1grp {
+		fsl,pins = <
+			MX8MQ_IOMUXC_UART1_RXD_UART1_DCE_RX		0x49
+			MX8MQ_IOMUXC_UART1_TXD_UART1_DCE_TX		0x49
+		>;
+	};
+
+	pinctrl_usdhc1: usdhc1grp {
+		fsl,pins = <
+			MX8MQ_IOMUXC_SD1_CLK_USDHC1_CLK			0x83
+			MX8MQ_IOMUXC_SD1_CMD_USDHC1_CMD			0xc3
+			MX8MQ_IOMUXC_SD1_DATA0_USDHC1_DATA0		0xc3
+			MX8MQ_IOMUXC_SD1_DATA1_USDHC1_DATA1		0xc3
+			MX8MQ_IOMUXC_SD1_DATA2_USDHC1_DATA2		0xc3
+			MX8MQ_IOMUXC_SD1_DATA3_USDHC1_DATA3		0xc3
+			MX8MQ_IOMUXC_SD1_DATA4_USDHC1_DATA4		0xc3
+			MX8MQ_IOMUXC_SD1_DATA5_USDHC1_DATA5		0xc3
+			MX8MQ_IOMUXC_SD1_DATA6_USDHC1_DATA6		0xc3
+			MX8MQ_IOMUXC_SD1_DATA7_USDHC1_DATA7		0xc3
+			MX8MQ_IOMUXC_SD1_STROBE_USDHC1_STROBE		0x83
+			MX8MQ_IOMUXC_SD1_RESET_B_USDHC1_RESET_B		0xc1
+		>;
+	};
+
+	pinctrl_usdhc1_100mhz: usdhc1grp100mhz {
+		fsl,pins = <
+			MX8MQ_IOMUXC_SD1_CLK_USDHC1_CLK			0x85
+			MX8MQ_IOMUXC_SD1_CMD_USDHC1_CMD			0xc5
+			MX8MQ_IOMUXC_SD1_DATA0_USDHC1_DATA0		0xc5
+			MX8MQ_IOMUXC_SD1_DATA1_USDHC1_DATA1		0xc5
+			MX8MQ_IOMUXC_SD1_DATA2_USDHC1_DATA2		0xc5
+			MX8MQ_IOMUXC_SD1_DATA3_USDHC1_DATA3		0xc5
+			MX8MQ_IOMUXC_SD1_DATA4_USDHC1_DATA4		0xc5
+			MX8MQ_IOMUXC_SD1_DATA5_USDHC1_DATA5		0xc5
+			MX8MQ_IOMUXC_SD1_DATA6_USDHC1_DATA6		0xc5
+			MX8MQ_IOMUXC_SD1_DATA7_USDHC1_DATA7		0xc5
+			MX8MQ_IOMUXC_SD1_STROBE_USDHC1_STROBE		0x85
+			MX8MQ_IOMUXC_SD1_RESET_B_USDHC1_RESET_B		0xc1
+		>;
+	};
+
+	pinctrl_usdhc1_200mhz: usdhc1grp200mhz {
+		fsl,pins = <
+			MX8MQ_IOMUXC_SD1_CLK_USDHC1_CLK			0x87
+			MX8MQ_IOMUXC_SD1_CMD_USDHC1_CMD			0xc7
+			MX8MQ_IOMUXC_SD1_DATA0_USDHC1_DATA0		0xc7
+			MX8MQ_IOMUXC_SD1_DATA1_USDHC1_DATA1		0xc7
+			MX8MQ_IOMUXC_SD1_DATA2_USDHC1_DATA2		0xc7
+			MX8MQ_IOMUXC_SD1_DATA3_USDHC1_DATA3		0xc7
+			MX8MQ_IOMUXC_SD1_DATA4_USDHC1_DATA4		0xc7
+			MX8MQ_IOMUXC_SD1_DATA5_USDHC1_DATA5		0xc7
+			MX8MQ_IOMUXC_SD1_DATA6_USDHC1_DATA6		0xc7
+			MX8MQ_IOMUXC_SD1_DATA7_USDHC1_DATA7		0xc7
+			MX8MQ_IOMUXC_SD1_STROBE_USDHC1_STROBE		0x87
+			MX8MQ_IOMUXC_SD1_RESET_B_USDHC1_RESET_B		0xc1
+		>;
+	};
+
+	pinctrl_usdhc2_gpio: usdhc2grpgpio {
+		fsl,pins = <
+			MX8MQ_IOMUXC_SD2_CD_B_GPIO2_IO12	0x41
+			MX8MQ_IOMUXC_SD2_RESET_B_GPIO2_IO19	0x41
+		>;
+	};
+
+	pinctrl_usdhc2: usdhc2grp {
+		fsl,pins = <
+			MX8MQ_IOMUXC_SD2_CLK_USDHC2_CLK			0x83
+			MX8MQ_IOMUXC_SD2_CMD_USDHC2_CMD			0xc3
+			MX8MQ_IOMUXC_SD2_DATA0_USDHC2_DATA0		0xc3
+			MX8MQ_IOMUXC_SD2_DATA1_USDHC2_DATA1		0xc3
+			MX8MQ_IOMUXC_SD2_DATA2_USDHC2_DATA2		0xc3
+			MX8MQ_IOMUXC_SD2_DATA3_USDHC2_DATA3		0xc3
+			MX8MQ_IOMUXC_GPIO1_IO04_USDHC2_VSELECT		0xc1
+		>;
+	};
+
+	pinctrl_usdhc2_100mhz: usdhc2grp100mhz {
+		fsl,pins = <
+			MX8MQ_IOMUXC_SD2_CLK_USDHC2_CLK			0x85
+			MX8MQ_IOMUXC_SD2_CMD_USDHC2_CMD			0xc5
+			MX8MQ_IOMUXC_SD2_DATA0_USDHC2_DATA0		0xc5
+			MX8MQ_IOMUXC_SD2_DATA1_USDHC2_DATA1		0xc5
+			MX8MQ_IOMUXC_SD2_DATA2_USDHC2_DATA2		0xc5
+			MX8MQ_IOMUXC_SD2_DATA3_USDHC2_DATA3		0xc5
+			MX8MQ_IOMUXC_GPIO1_IO04_USDHC2_VSELECT		0xc1
+		>;
+	};
+
+	pinctrl_usdhc2_200mhz: usdhc2grp200mhz {
+		fsl,pins = <
+			MX8MQ_IOMUXC_SD2_CLK_USDHC2_CLK			0x87
+			MX8MQ_IOMUXC_SD2_CMD_USDHC2_CMD			0xc7
+			MX8MQ_IOMUXC_SD2_DATA0_USDHC2_DATA0		0xc7
+			MX8MQ_IOMUXC_SD2_DATA1_USDHC2_DATA1		0xc7
+			MX8MQ_IOMUXC_SD2_DATA2_USDHC2_DATA2		0xc7
+			MX8MQ_IOMUXC_SD2_DATA3_USDHC2_DATA3		0xc7
+			MX8MQ_IOMUXC_GPIO1_IO04_USDHC2_VSELECT		0xc1
+		>;
+	};
+
+	pinctrl_wdog: wdoggrp {
+		fsl,pins = <
+			MX8MQ_IOMUXC_GPIO1_IO02_WDOG1_WDOG_B 0xc6
+		>;
+	};
+};

arch/arm/mach-imx/imx8m/Kconfig

@@ -32,6 +32,11 @@ config TARGET_IMX8MQ_EVK
 	select IMX8MQ
 	select IMX8M_LPDDR4
 
+config TARGET_IMX8MQ_PHANBELL
+        bool "imx8mq_phanbell"
+        select IMX8MQ
+        select IMX8M_LPDDR4
+
 config TARGET_IMX8MM_EVK
 	bool "imx8mm LPDDR4 EVK board"
 	select IMX8MM
@@ -62,6 +67,7 @@ source "board/freescale/imx8mq_evk/Kconfig"
 source "board/freescale/imx8mm_evk/Kconfig"
 source "board/freescale/imx8mn_evk/Kconfig"
 source "board/freescale/imx8mp_evk/Kconfig"
+source "board/google/imx8mq_phanbell/Kconfig"
 source "board/toradex/verdin-imx8mm/Kconfig"
 
 endif

board/google/imx8mq_phanbell/Kconfig

@@ -0,0 +1,12 @@
+if TARGET_IMX8MQ_PHANBELL
+
+config SYS_BOARD
+	default "imx8mq_phanbell"
+
+config SYS_VENDOR
+	default "google"
+
+config SYS_CONFIG_NAME
+	default "imx8mq_phanbell"
+
+endif

board/google/imx8mq_phanbell/MAINTAINERS

@@ -0,0 +1,8 @@
+i.MX 8MQ PHANBELL BOARD
+M:	Fabio Estevam <festevam@gmail.com>
+M:	Marco Franchi <marcofrk@gmail.com>
+M:	Alifer Moraes <alifer.wsdm@gmail.com>
+S:	Maintained
+F:	board/google/imx8mq_phanbell/
+F:	include/configs/imx8mq_phanbell.h
+F:	configs/imx8mq_phanbell_defconfig

board/google/imx8mq_phanbell/Makefile

@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright 2020 NXP
+#
+
+obj-y += imx8mq_phanbell.o
+
+ifdef CONFIG_SPL_BUILD
+obj-y += spl.o
+obj-$(CONFIG_IMX8M_LPDDR4) += lpddr4_timing_1g.o
+endif

board/google/imx8mq_phanbell/README

@@ -0,0 +1,37 @@
+U-Boot for Google's i.MX8MQ Phanbell board
+
+Quick Start
+===========
+- Build the ARM Trusted firmware binary
+- Get ddr and hdmi firmware
+- Build U-Boot
+- Boot
+
+Get and Build the ARM Trusted firmware
+======================================
+Note: srctree is U-Boot source directory
+Get ATF from: https://source.codeaurora.org/external/imx/imx-atf
+branch: imx_4.19.35_1.0.0
+$ make PLAT=imx8mq bl31
+$ cp build/imx8mq/release/bl31.bin $(builddir)
+
+Get the ddr and hdmi firmware
+=============================
+$ wget https://www.nxp.com/lgfiles/NMG/MAD/YOCTO/firmware-imx-7.9.bin
+$ chmod +x firmware-imx-7.9.bin
+$ ./firmware-imx-7.9.bin
+$ cp firmware-imx-7.9/firmware/hdmi/cadence/signed_hdmi_imx8m.bin $(builddir)
+$ cp firmware-imx-7.9/firmware/ddr/synopsys/lpddr4*.bin $(builddir)
+
+Build U-Boot
+============
+$ export CROSS_COMPILE=aarch64-linux-gnu-
+$ make imx8mq_phanbell_defconfig
+$ make flash.bin
+
+Burn the flash.bin to MicroSD card offset 33KB
+$sudo dd if=flash.bin of=/dev/sd[x] bs=1K seek=33
+
+Boot
+====
+Set Boot switch SW1: 1011 to boot from Micro SD.

board/google/imx8mq_phanbell/imx8mq_phanbell.c

@@ -0,0 +1,100 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2020 NXP
+ */
+
+#include <common.h>
+#include <env.h>
+#include <init.h>
+#include <malloc.h>
+#include <errno.h>
+#include <asm/io.h>
+#include <miiphy.h>
+#include <netdev.h>
+#include <asm/mach-imx/iomux-v3.h>
+#include <asm-generic/gpio.h>
+#include <fsl_esdhc_imx.h>
+#include <mmc.h>
+#include <asm/arch/imx8mq_pins.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/mach-imx/gpio.h>
+#include <asm/arch/clock.h>
+#include <spl.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define UART_PAD_CTRL	(PAD_CTL_DSE6 | PAD_CTL_FSEL1)
+
+#define WDOG_PAD_CTRL	(PAD_CTL_DSE6 | PAD_CTL_HYS | PAD_CTL_PUE)
+
+static iomux_v3_cfg_t const wdog_pads[] = {
+	IMX8MQ_PAD_GPIO1_IO02__WDOG1_WDOG_B | MUX_PAD_CTRL(WDOG_PAD_CTRL),
+};
+
+static iomux_v3_cfg_t const uart_pads[] = {
+	IMX8MQ_PAD_UART1_RXD__UART1_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
+	IMX8MQ_PAD_UART1_TXD__UART1_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
+};
+
+int board_early_init_f(void)
+{
+	struct wdog_regs *wdog = (struct wdog_regs *)WDOG1_BASE_ADDR;
+
+	imx_iomux_v3_setup_multiple_pads(wdog_pads, ARRAY_SIZE(wdog_pads));
+	set_wdog_reset(wdog);
+
+	imx_iomux_v3_setup_multiple_pads(uart_pads, ARRAY_SIZE(uart_pads));
+
+	return 0;
+}
+
+int dram_init(void)
+{
+	/* rom_pointer[1] contains the size of TEE occupies */
+	if (rom_pointer[1])
+		gd->ram_size = PHYS_SDRAM_SIZE - rom_pointer[1];
+	else
+		gd->ram_size = PHYS_SDRAM_SIZE;
+
+	return 0;
+}
+
+#ifdef CONFIG_FEC_MXC
+static int setup_fec(void)
+{
+	struct iomuxc_gpr_base_regs *gpr =
+		(struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR;
+
+	/* Use 125M anatop REF_CLK1 for ENET1, not from external */
+	clrsetbits_le32(&gpr->gpr[1], BIT(13) | BIT(17), 0);
+	return set_clk_enet(ENET_125MHZ);
+}
+
+int board_phy_config(struct phy_device *phydev)
+{
+	/* enable rgmii rxc skew and phy mode select to RGMII copper */
+	phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x1f);
+	phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, 0x8);
+
+	phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x05);
+	phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, 0x100);
+
+	if (phydev->drv->config)
+		phydev->drv->config(phydev);
+	return 0;
+}
+#endif
+
+int board_init(void)
+{
+#ifdef CONFIG_FEC_MXC
+	setup_fec();
+#endif
+
+	return 0;
+}
+
+int board_mmc_get_env_dev(int devno)
+{
+	return devno;
+}

board/google/imx8mq_phanbell/spl.c

@@ -0,0 +1,180 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2020 NXP
+ *
+ */
+
+#include <common.h>
+#include <hang.h>
+#include <asm/io.h>
+#include <errno.h>
+#include <asm/io.h>
+#include <asm/arch/ddr.h>
+#include <asm/arch/imx8mq_pins.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/clock.h>
+#include <asm/mach-imx/iomux-v3.h>
+#include <asm/mach-imx/gpio.h>
+#include <asm/mach-imx/mxc_i2c.h>
+#include <asm/sections.h>
+#include <fsl_esdhc_imx.h>
+#include <mmc.h>
+#include <spl.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static void spl_dram_init(void)
+{
+	/* ddr init */
+	ddr_init(&dram_timing);
+}
+
+#define USDHC2_CD_GPIO	IMX_GPIO_NR(2, 12)
+#define USDHC1_PWR_GPIO IMX_GPIO_NR(2, 10)
+#define USDHC2_PWR_GPIO IMX_GPIO_NR(2, 19)
+
+int board_mmc_getcd(struct mmc *mmc)
+{
+	struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
+	int ret = 0;
+
+	switch (cfg->esdhc_base) {
+	case USDHC1_BASE_ADDR:
+		ret = 1;
+		break;
+	case USDHC2_BASE_ADDR:
+		ret = !gpio_get_value(USDHC2_CD_GPIO);
+		return ret;
+	}
+
+	return 1;
+}
+
+#define USDHC_PAD_CTRL	(PAD_CTL_DSE6 | PAD_CTL_HYS | PAD_CTL_PUE | \
+			 PAD_CTL_FSEL2)
+#define USDHC_GPIO_PAD_CTRL (PAD_CTL_PUE | PAD_CTL_DSE1)
+
+static iomux_v3_cfg_t const usdhc1_pads[] = {
+	IMX8MQ_PAD_SD1_CLK__USDHC1_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_CMD__USDHC1_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA0__USDHC1_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA1__USDHC1_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA2__USDHC1_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA3__USDHC1_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA4__USDHC1_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA5__USDHC1_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA6__USDHC1_DATA6 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA7__USDHC1_DATA7 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_RESET_B__GPIO2_IO10 | MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
+static iomux_v3_cfg_t const usdhc2_pads[] = {
+	IMX8MQ_PAD_SD2_CLK__USDHC2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0xd6 */
+	IMX8MQ_PAD_SD2_CMD__USDHC2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0xd6 */
+	IMX8MQ_PAD_SD2_DATA0__USDHC2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0xd6 */
+	IMX8MQ_PAD_SD2_DATA1__USDHC2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0xd6 */
+	IMX8MQ_PAD_SD2_DATA2__USDHC2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0x16 */
+	IMX8MQ_PAD_SD2_DATA3__USDHC2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0xd6 */
+	IMX8MQ_PAD_SD2_CD_B__GPIO2_IO12 | MUX_PAD_CTRL(USDHC_GPIO_PAD_CTRL),
+	IMX8MQ_PAD_SD2_RESET_B__GPIO2_IO19 | MUX_PAD_CTRL(USDHC_GPIO_PAD_CTRL),
+};
+
+static struct fsl_esdhc_cfg usdhc_cfg[2] = {
+	{USDHC1_BASE_ADDR},
+	{USDHC2_BASE_ADDR},
+};
+
+int board_mmc_init(bd_t *bis)
+{
+	int i, ret;
+	/*
+	 * According to the board_mmc_init() the following map is done:
+	 * (U-Boot device node)    (Physical Port)
+	 * mmc0                    USDHC1
+	 * mmc1                    USDHC2
+	 */
+	for (i = 0; i < CONFIG_SYS_FSL_USDHC_NUM; i++) {
+		switch (i) {
+		case 0:
+			init_clk_usdhc(0);
+			usdhc_cfg[0].sdhc_clk = mxc_get_clock(USDHC1_CLK_ROOT);
+			usdhc_cfg[0].max_bus_width = 8;
+			imx_iomux_v3_setup_multiple_pads(usdhc1_pads,
+							 ARRAY_SIZE(usdhc1_pads));
+			gpio_request(USDHC1_PWR_GPIO, "usdhc1_reset");
+			gpio_direction_output(USDHC1_PWR_GPIO, 0);
+			udelay(500);
+			gpio_direction_output(USDHC1_PWR_GPIO, 1);
+			break;
+		case 1:
+			init_clk_usdhc(1);
+			usdhc_cfg[1].sdhc_clk = mxc_get_clock(USDHC2_CLK_ROOT);
+			usdhc_cfg[1].max_bus_width = 4;
+			imx_iomux_v3_setup_multiple_pads(usdhc2_pads,
+							 ARRAY_SIZE(usdhc2_pads));
+			gpio_request(USDHC2_PWR_GPIO, "usdhc2_reset");
+			gpio_direction_output(USDHC2_PWR_GPIO, 0);
+			udelay(500);
+			gpio_direction_output(USDHC2_PWR_GPIO, 1);
+			break;
+		default:
+			printf("Warning: you configured more USDHC controllers(%d) than supported by the board\n", i + 1);
+			return -EINVAL;
+		}
+
+		ret = fsl_esdhc_initialize(bis, &usdhc_cfg[i]);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+void spl_board_init(void)
+{
+	puts("Normal Boot\n");
+}
+
+#ifdef CONFIG_SPL_LOAD_FIT
+int board_fit_config_name_match(const char *name)
+{
+	/* Just empty function now - can't decide what to choose */
+	debug("%s: %s\n", __func__, name);
+
+	return 0;
+}
+#endif
+
+void board_init_f(ulong dummy)
+{
+	int ret;
+
+	/* Clear global data */
+	memset((void *)gd, 0, sizeof(gd_t));
+
+	arch_cpu_init();
+
+	init_uart_clk(0);
+
+	board_early_init_f();
+
+	timer_init();
+
+	preloader_console_init();
+
+	/* Clear the BSS. */
+	memset(__bss_start, 0, __bss_end - __bss_start);
+
+	ret = spl_init();
+	if (ret) {
+		debug("spl_init() failed: %d\n", ret);
+		hang();
+	}
+
+	enable_tzc380();
+
+	/* DDR initialization */
+	spl_dram_init();
+
+	board_init_r(NULL, 0);
+}

configs/imx8mq_phanbell_defconfig

@@ -0,0 +1,52 @@
+CONFIG_ARM=y
+CONFIG_SPL_SYS_ICACHE_OFF=y
+CONFIG_SPL_SYS_DCACHE_OFF=y
+CONFIG_ARCH_IMX8M=y
+CONFIG_SYS_TEXT_BASE=0x40200000
+CONFIG_ENV_SIZE=0x1000
+CONFIG_ENV_OFFSET=0x400000
+CONFIG_SYS_MALLOC_F_LEN=0x4000
+CONFIG_DM_GPIO=y
+CONFIG_TARGET_IMX8MQ_PHANBELL=y
+CONFIG_SPL_SERIAL_SUPPORT=y
+CONFIG_SPL=y
+CONFIG_CSF_SIZE=0x2000
+CONFIG_SPL_TEXT_BASE=0x7E1000
+CONFIG_FIT=y
+CONFIG_FIT_EXTERNAL_OFFSET=0x3000
+CONFIG_SPL_LOAD_FIT=y
+CONFIG_SPL_FIT_GENERATOR="arch/arm/mach-imx/mkimage_fit_atf.sh"
+CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/mach-imx/imx8m/imximage.cfg"
+CONFIG_SPL_BOARD_INIT=y
+CONFIG_HUSH_PARSER=y
+# CONFIG_BOOTM_NETBSD is not set
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_I2C=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_REGULATOR=y
+CONFIG_CMD_EXT2=y
+CONFIG_CMD_EXT4=y
+CONFIG_CMD_EXT4_WRITE=y
+CONFIG_CMD_FAT=y
+CONFIG_OF_CONTROL=y
+CONFIG_DEFAULT_DEVICE_TREE="imx8mq-phanbell"
+CONFIG_ENV_IS_IN_MMC=y
+CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_SAVED_DRAM_TIMING_BASE=0x40000000
+CONFIG_DM_I2C=y
+CONFIG_SYS_I2C_MXC=y
+CONFIG_DM_MMC=y
+CONFIG_SUPPORT_EMMC_BOOT=y
+CONFIG_FSL_USDHC=y
+CONFIG_DM_ETH=y
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_IMX8M=y
+CONFIG_POWER_DOMAIN=y
+CONFIG_IMX8M_POWER_DOMAIN=y
+CONFIG_DM_REGULATOR=y
+CONFIG_DM_REGULATOR_FIXED=y
+CONFIG_DM_REGULATOR_GPIO=y
+CONFIG_DM_RESET=y
+CONFIG_DM_THERMAL=y
+CONFIG_SD_BOOT=y
+# CONFIG_SPL_DOS_PARTITION is not set

include/configs/imx8mq_phanbell.h

@@ -0,0 +1,216 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2020 NXP
+ */
+
+#ifndef __IMX8M_PHANBELL_H
+#define __IMX8M_PHANBELL_H
+
+#include <linux/sizes.h>
+#include <asm/arch/imx-regs.h>
+
+#define CONFIG_SPL_MAX_SIZE		(172 * 1024)
+#define CONFIG_SYS_MONITOR_LEN		(512 * 1024)
+#define CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
+#define CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR	0x300
+#define CONFIG_SYS_MMCSD_FS_BOOT_PARTITION	1
+
+#ifdef CONFIG_SPL_BUILD
+/*#define CONFIG_ENABLE_DDR_TRAINING_DEBUG*/
+#define CONFIG_SPL_WATCHDOG_SUPPORT
+#define CONFIG_SPL_DRIVERS_MISC_SUPPORT
+#define CONFIG_SPL_POWER_SUPPORT
+#define CONFIG_SPL_I2C_SUPPORT
+#define CONFIG_SPL_LDSCRIPT		"arch/arm/cpu/armv8/u-boot-spl.lds"
+#define CONFIG_SPL_STACK		0x187FF0
+#define CONFIG_SPL_LIBCOMMON_SUPPORT
+#define CONFIG_SPL_LIBGENERIC_SUPPORT
+#define CONFIG_SPL_GPIO_SUPPORT
+#define CONFIG_SPL_MMC_SUPPORT
+#define CONFIG_SPL_BSS_START_ADDR      0x00180000
+#define CONFIG_SPL_BSS_MAX_SIZE        0x2000	/* 8 KB */
+#define CONFIG_SYS_SPL_MALLOC_START    0x42200000
+#define CONFIG_SYS_SPL_MALLOC_SIZE    0x80000	/* 512 KB */
+#define CONFIG_SYS_SPL_PTE_RAM_BASE    0x41580000
+
+/* malloc f used before GD_FLG_FULL_MALLOC_INIT set */
+#define CONFIG_MALLOC_F_ADDR		0x182000
+/* For RAW image gives a error info not panic */
+#define CONFIG_SPL_ABORT_ON_RAW_IMAGE
+
+#undef CONFIG_DM_MMC
+#undef CONFIG_DM_PMIC
+#undef CONFIG_DM_PMIC_PFUZE100
+
+#define CONFIG_SYS_I2C
+#define CONFIG_SYS_I2C_MXC_I2C1		/* enable I2C bus 1 */
+#define CONFIG_SYS_I2C_MXC_I2C2		/* enable I2C bus 2 */
+#define CONFIG_SYS_I2C_MXC_I2C3		/* enable I2C bus 3 */
+
+#define CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
+
+#define CONFIG_POWER
+#define CONFIG_POWER_I2C
+#endif
+
+#define CONFIG_REMAKE_ELF
+
+#define CONFIG_BOARD_EARLY_INIT_F
+
+#undef CONFIG_CMD_EXPORTENV
+#undef CONFIG_CMD_IMPORTENV
+#undef CONFIG_CMD_IMLS
+
+#undef CONFIG_CMD_CRC32
+
+/* ENET Config */
+/* ENET1 */
+#if defined(CONFIG_CMD_NET)
+#define CONFIG_CMD_PING
+#define CONFIG_CMD_DHCP
+#define CONFIG_CMD_MII
+#define CONFIG_MII
+#define CONFIG_ETHPRIME                 "FEC"
+
+#define CONFIG_FEC_MXC
+#define CONFIG_FEC_XCV_TYPE             RGMII
+#define CONFIG_FEC_MXC_PHYADDR          0
+#define FEC_QUIRK_ENET_MAC
+
+#define CONFIG_PHY_GIGE
+#define IMX_FEC_BASE			0x30BE0000
+
+#define CONFIG_PHYLIB
+#endif
+
+#define CONFIG_MFG_ENV_SETTINGS \
+	"initrd_addr=0x43800000\0" \
+	"initrd_high=0xffffffff\0" \
+
+/* Initial environment variables */
+#define CONFIG_EXTRA_ENV_SETTINGS		\
+	CONFIG_MFG_ENV_SETTINGS \
+	"script=boot.scr\0" \
+	"image=Image\0" \
+	"console=ttymxc0,115200\0" \
+	"fdt_addr=0x43000000\0"			\
+	"fdt_high=0xffffffffffffffff\0"		\
+	"boot_fdt=try\0" \
+	"fdt_file=imx8mq-phanbell.dtb\0" \
+	"initrd_addr=0x43800000\0"		\
+	"initrd_high=0xffffffffffffffff\0" \
+	"mmcdev="__stringify(CONFIG_SYS_MMC_ENV_DEV)"\0" \
+	"mmcpart=" __stringify(CONFIG_SYS_MMC_IMG_LOAD_PART) "\0" \
+	"mmcroot=" CONFIG_MMCROOT " rootwait rw\0" \
+	"mmcautodetect=yes\0" \
+	"mmcargs=setenv bootargs console=${console} root=${mmcroot}\0 " \
+	"loadbootscript=fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${script};\0" \
+	"bootscript=echo Running bootscript from mmc ...; " \
+		"source\0" \
+	"loadimage=fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${image}\0" \
+	"loadfdt=fatload mmc ${mmcdev}:${mmcpart} ${fdt_addr} ${fdt_file}\0" \
+	"mmcboot=echo Booting from mmc ...; " \
+		"run mmcargs; " \
+		"if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \
+			"if run loadfdt; then " \
+				"booti ${loadaddr} - ${fdt_addr}; " \
+			"else " \
+				"echo WARN: Cannot load the DT; " \
+			"fi; " \
+		"else " \
+			"echo wait for boot; " \
+		"fi;\0" \
+	"netargs=setenv bootargs console=${console} " \
+		"root=/dev/nfs " \
+		"ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp\0" \
+	"netboot=echo Booting from net ...; " \
+		"run netargs;  " \
+		"if test ${ip_dyn} = yes; then " \
+			"setenv get_cmd dhcp; " \
+		"else " \
+			"setenv get_cmd tftp; " \
+		"fi; " \
+		"${get_cmd} ${loadaddr} ${image}; " \
+		"if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \
+			"if ${get_cmd} ${fdt_addr} ${fdt_file}; then " \
+				"booti ${loadaddr} - ${fdt_addr}; " \
+			"else " \
+				"echo WARN: Cannot load the DT; " \
+			"fi; " \
+		"else " \
+			"booti; " \
+		"fi;\0"
+
+#define CONFIG_BOOTCOMMAND \
+	   "mmc dev ${mmcdev}; if mmc rescan; then " \
+		   "if run loadbootscript; then " \
+			   "run bootscript; " \
+		   "else " \
+			   "if run loadimage; then " \
+				   "run mmcboot; " \
+			   "else run netboot; " \
+			   "fi; " \
+		   "fi; " \
+	   "else booti ${loadaddr} - ${fdt_addr}; fi"
+
+/* Link Definitions */
+#define CONFIG_LOADADDR			0x40480000
+
+#define CONFIG_SYS_LOAD_ADDR           CONFIG_LOADADDR
+
+#define CONFIG_SYS_INIT_RAM_ADDR        0x40000000
+#define CONFIG_SYS_INIT_RAM_SIZE        0x80000
+#define CONFIG_SYS_INIT_SP_OFFSET \
+	(CONFIG_SYS_INIT_RAM_SIZE - GENERATED_GBL_DATA_SIZE)
+#define CONFIG_SYS_INIT_SP_ADDR \
+	(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)
+
+#define CONFIG_ENV_OVERWRITE
+#define CONFIG_SYS_MMC_ENV_DEV		1   /* USDHC2 */
+#define CONFIG_MMCROOT			"/dev/mmcblk1p2"  /* USDHC2 */
+
+/* Size of malloc() pool */
+#define CONFIG_SYS_MALLOC_LEN		((CONFIG_ENV_SIZE + (2 * 1024)) * 1024)
+
+#define CONFIG_SYS_SDRAM_BASE           0x40000000
+#define PHYS_SDRAM                      0x40000000
+#define PHYS_SDRAM_SIZE			0x40000000 /* 1GB DDR */
+
+#define CONFIG_SYS_MEMTEST_START	PHYS_SDRAM
+#define CONFIG_SYS_MEMTEST_END		(CONFIG_SYS_MEMTEST_START + \
+					(PHYS_SDRAM_SIZE >> 1))
+
+#define CONFIG_MXC_UART
+#define CONFIG_MXC_UART_BASE		UART1_BASE_ADDR
+
+/* Monitor Command Prompt */
+#define CONFIG_SYS_PROMPT_HUSH_PS2	"> "
+#define CONFIG_SYS_CBSIZE		1024
+#define CONFIG_SYS_MAXARGS		64
+#define CONFIG_SYS_BARGSIZE		CONFIG_SYS_CBSIZE
+#define CONFIG_SYS_PBSIZE		(CONFIG_SYS_CBSIZE + \
+					sizeof(CONFIG_SYS_PROMPT) + 16)
+
+#define CONFIG_IMX_BOOTAUX
+
+#define CONFIG_CMD_MMC
+
+#define CONFIG_SYS_FSL_USDHC_NUM	2
+#define CONFIG_SYS_FSL_ESDHC_ADDR       0
+
+#define CONFIG_SYS_MMC_IMG_LOAD_PART	1
+
+#define CONFIG_MXC_GPIO
+
+#define CONFIG_CMD_FUSE
+
+/* I2C Configs */
+#define CONFIG_SYS_I2C_SPEED		  100000
+
+#define CONFIG_OF_SYSTEM_SETUP
+
+#ifndef CONFIG_SPL_BUILD
+#define CONFIG_DM_PMIC
+#endif
+
+#endif