[Build 100ask_imx6ull_pro development board operating environment from scratch] 1_ubuntu & cross toolchain & uboot

• The article assumes that the reader has a certain level of understanding of the basics of linux
• Supplementary information "Embedded Linux Complete Development Manual" - IMX6ull development board from scratch

 本文描述从各个网站（官网）下载最新 ubuntu、交叉编译器、uboot、kernel、buildroot 从零开始构建，更接近实际工程环境
(可同时交叉参阅两份文章)

1. About ubuntu

• Download and install the latest desktop LTS version ubuntu
• Normal steps to install (refer to other articles on the network)

• a few key settings

  • Disk size: 60GB or more
  • Network connection: use bridged network (copy network connection status) [router connects development board and computer]

2. About the cross tool chain

1. Download

ARM Developer Center Download Cross Compilation Toolchain

 host 为 linux 👉 `x86_64 linux`
imx6ul 为 arm_A7 架构 👉 `AArch32`
imx6ul 支持硬件浮点 👉 `hard fllat`
需支持 linux 操作系统 👉 `none-linux`

2. Configuration

unzip

 tiansong@tiansong:~/100ask_imx6ull_pro$ ls
arm-gnu-toolchain-11.3.rel1-x86_64-arm-none-linux-gnueabihf.tar.xz

tiansong@tiansong:~/100ask_imx6ull_pro$ tar -xvf arm-gnu-toolchain-11.3.rel1-x86_64-arm-none-linux-gnueabihf.tar.xz

tiansong@tiansong:~/100ask_imx6ull_pro$ ls
arm-gnu-toolchain-11.3.rel1-x86_64-arm-none-linux-gnueabihf  arm-gnu-toolchain-11.3.rel1-x86_64-arm-none-linux-gnueabihf.tar.xz

Set environment variables

 tiansong@tiansong:~$ vim ~/.bashrc

# 在文件末尾追加
export ARCH=arm
export CROSS_COMPILE=arm-none-linux-gnueabihf-
export PATH=$PATH:/home/tiansong/100ask_imx6ull_pro/arm-gnu-toolchain-11.3.rel1-x86_64-arm-none-linux-gnueabihf/bin

# 使环境变量在当前终端生效
tiansong@tiansong:~/100ask_imx6ull_pro$ source ~/.bashrc

Verify that the configuration is successful

 tiansong@tiansong:~/100ask_imx6ull_pro$ arm-none-linux-gnueabihf-gcc -v
Using built-in specs.
COLLECT_GCC=arm-none-linux-gnueabihf-gcc
COLLECT_LTO_WRAPPER=/home/tiansong/100ask_imx6ull_pro/arm-gnu-toolchain-11.3.rel1-x86_64-arm-none-linux-gnueabihf/bin/../libexec/gcc/arm-none-linux-gnueabihf/11.3.1/lto-wrapper
Target: arm-none-linux-gnueabihf
Configured with: /data/jenkins/workspace/GNU-toolchain/arm-11/src/gcc/configure --target=arm-none-linux-gnueabihf --prefix= --with-sysroot=/arm-none-linux-gnueabihf/libc --with-build-sysroot=/data/jenkins/workspace/GNU-toolchain/arm-11/build-arm-none-linux-gnueabihf/install//arm-none-linux-gnueabihf/libc --with-bugurl=https://bugs.linaro.org/ --enable-gnu-indirect-function --enable-shared --disable-libssp --disable-libmudflap --enable-checking=release --enable-languages=c,c++,fortran --with-gmp=/data/jenkins/workspace/GNU-toolchain/arm-11/build-arm-none-linux-gnueabihf/host-tools --with-mpfr=/data/jenkins/workspace/GNU-toolchain/arm-11/build-arm-none-linux-gnueabihf/host-tools --with-mpc=/data/jenkins/workspace/GNU-toolchain/arm-11/build-arm-none-linux-gnueabihf/host-tools --with-isl=/data/jenkins/workspace/GNU-toolchain/arm-11/build-arm-none-linux-gnueabihf/host-tools --with-arch=armv7-a --with-fpu=neon --with-float=hard --with-mode=thumb --with-arch=armv7-a --with-pkgversion='Arm GNU Toolchain 11.3.Rel1'
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 11.3.1 20220712 (Arm GNU Toolchain 11.3.Rel1)

3. About uboot

1. Download

 # 下载
tiansong@tiansong:~/100ask_imx6ull_pro$ tiansong@tiansong:~/100ask_imx6ull_pro$ git clone https://source.codeaurora.cn/external/imx/uboot-imx
tiansong@tiansong:~/100ask_imx6ull_pro$ ls
arm-gnu-toolchain-11.3.rel1-x86_64-arm-none-linux-gnueabihf  uboot-imx

# 查看仓库所有分支
tiansong@tiansong:~/100ask_imx6ull_pro$ cd uboot-imx/
tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx$ git branch -a
...
remotes/origin/imx_v2020.04_5.4.70_2.3.0
...

# 切换到 imx 最新分支
tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx$ git checkout remotes/origin/imx_v2020.04_5.4.70_2.3.0
Updating files: 100% (11834/11834), done.
Note: switching to 'remotes/origin/imx_v2020.04_5.4.70_2.3.0'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by switching back to a branch.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -c with the switch command. Example:

  git switch -c <new-branch-name>

Or undo this operation with:

  git switch -

Turn off this advice by setting config variable advice.detachedHead to false

HEAD is now at 62a81128c0 MLK-25878: imx8: scu: Increase sendmsg timeout for SCFW MU

# 确认是否却换成功
tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx$ git log -1
commit 62a81128c07c3efc123039f796ffc43b4eacbf04 (HEAD, origin/imx_v2020.04_5.4.70_2.3.0)
Author: Nitin Garg <[e-mail]>
Date:   Fri Apr 29 10:54:20 2022 -0500

    MLK-25878: imx8: scu: Increase sendmsg timeout for SCFW MU

    Similar to receivemsg, sendmsg function should also
    use 1 sec timeout for MU communication with SCFW.

    Signed-off-by: Nitin Garg <[e-mail]>
    Reviewed-by: Ye Li <[e-mail]>

2. Development board file adaptation

Prerequisites: There are many connections, and the transplantation should be completed in one breath as much as possible.

default configuration file

Copy the default configuration file provided by the public board

 tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx$ cd configs/

tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx/configs$ ls *mx6ull_14x14_evk* -l
-rw-rw-r-- 1 tiansong tiansong 1988  8月 26 10:36 mx6ull_14x14_evk_defconfig             # imx6ullevk公板默认的配置文件，默认只支持 SD 卡启动
-rw-rw-r-- 1 tiansong tiansong 1963  8月 26 10:36 mx6ull_14x14_evk_emmc_defconfig        # imx6ull 支持 emmc 启动方式启动的配置文件
-rw-rw-r-- 1 tiansong tiansong 2095  8月 26 10:36 mx6ull_14x14_evk_nand_defconfig        # imx6ull 支持 nand 启动方式启动的配置文件
-rw-rw-r-- 1 tiansong tiansong 2007  8月 26 10:36 mx6ull_14x14_evk_optee_defconfig        # imx6ull 支持 optee 系统的配置文件
-rw-rw-r-- 1 tiansong tiansong 1958  8月 26 10:36 mx6ull_14x14_evk_plugin_defconfig        # imx6ull 支持扩展功能的配置文件，主要是烧写功能
-rw-rw-r-- 1 tiansong tiansong 2057  8月 26 10:36 mx6ull_14x14_evk_qspi1_defconfig        # imx6ull 支持扩展功能的配置文件，主要是烧写功能

tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx/configs$ cp mx6ull_14x14_evk_emmc_defconfig 100ask_imx6ull_pro_emmc_defconfig

tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx/configs$ ls 100ask_imx6ull_pro_emmc_defconfig -l
-rw-rw-r-- 1 tiansong tiansong 1982  8月 26 10:54 100ask_imx6ull_pro_emmc_defconfig

Modify the copied configuration file (three places)

 CONFIG_TARGET_MX6ULL_14X14_EVK=y
👉
CONFIG_TARGET_100ASK_IMX6ULL_PRO_EMMC=y


CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/mx6ullevk/imximage.cfg"
👉
CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/100ask/100ask_imx6ull_pro_emmc/imximage.cfg"


CONFIG_DEFAULT_DEVICE_TREE="imx6ull-14x14-evk-emmc"
👉
CONFIG_DEFAULT_DEVICE_TREE="100ask_imx6ull_pro_emmc"

Board level support

head File

Copy the .h file provided by the public board

 tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx$ cd include/configs/

tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx$ cd include/configs/

tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx/include/configs$ cp mx6ullevk.h 100ask_imx6ull_pro_emmc.h

Modify the copied .h file (two places)

 #ifndef __MX6ULLEVK_CONFIG_H
#define __MX6ULLEVK_CONFIG_H
👉
#ifndef __100ASK_IMX6ULL_PRO_EMMC_CONFIG_H
#define __100ASK_IMX6ULL_PRO_EMMC_CONFIG_H

folder

Copy the folder provided by the public board

 tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx$ cd board/

# 创建二级目录，100ask族和100ask_imx6ull_pro_emmc族
tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx/board$ mkdir 100ask
tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx/board$ mkdir 100ask/100ask_imx6ull_pro_emmc

# 复制 common 文件夹
tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx/board$ cp freescale/common 100ask/

# 复制 freescale/mx6ullevk/* 下所有公板文件
tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx/board$ cp freescale/mx6ullevk/* 100ask/100ask_imx6ull_pro_emmc/

# 查看文件数，确认是否操作成功
tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx/board$ cd 100ask/
tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx/board/100ask$ tree
.
├── 100ask_imx6ull_pro_emmc  # 注重修改 ！！
│   ├── 100ask_imx6ull_pro_emmc.c
│   ├── built-in.o
│   ├── imximage.cfg
│   ├── imximage_lpddr2.cfg
│   ├── Kconfig
│   ├── MAINTAINERS
│   ├── Makefile
│   ├── plugin.S
│   └── README
└── common
    ├── arm_sleep.c
    ├── built-in.o
    ├── cadmus.c
    ├── cadmus.h
    ├── cds_pci_ft.c
    ├── cds_via.c
    ...
    ...

tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx/board/100ask$ cd 100ask_imx6ull_pro_emmc/

Rename mx6ullevk.c

 tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx/board/freescale/mx6ullevk$ mv mx6ullevk.c 100ask_imx6ull_pro_emmc.c

Modified 100ask_imx6ull_pro_emmc.c

 int checkboard(void)
{
    else
        puts("Board: MX6ULL 14x14 EVK\n");
        👉
        puts("Board: 100ASK_IMX6ULL_PRO_EMMC\n");
    return 0;
}

Modified Makefile

 obj-y  := 100ask_imx6ull_pro_emmc.o

Modified Kconfig

 if TARGET_100ASK_IMX6ULL_PRO_EMMC         # 注意与 100ask_imx6ull_pro_emmc_defconfig 中 CONFIG_TARGET_100ASK_IMX6ULL_PRO_EMMC=y 对应 

config SYS_BOARD
        default "100ask_imx6ull_pro_emmc" # 100ask_imx6ull_pro_emmc 注意与后续多处对应

config SYS_VENDOR
        default "100ask"

config SYS_CONFIG_NAME
        default "100ask_imx6ull_pro_emmc"

config SYS_TEXT_BASE
        default 0x87800000
endif

Modify MAINTAINERS [Note that the path is filled in correctly]

 MX6ULLEVK BOARD
M:      Peng Fan <[e-mail]>
S:      Maintained
F:      board/100ask/100ask_imx6ull_pro_emmc/
F:      include/configs/100ask_imx6ull_pro.h
F:      configs/100ask_imx6ull_pro_emmc_defconfig

Modified imximage.cfg

 PLUGIN  board/freescale/mx6ullevk/plugin.bin 0x00907000
👉
PLUGIN  board/100ask/100ask_imx6ull_pro_emmc/plugin.bin 0x00907000

Modified imximage_lpddr2.cfg

 PLUGIN  board/freescale/mx6ullevk/plugin.bin 0x00907000
👉
PLUGIN  board/100ask/100ask_imx6ull_pro_emmc/plugin.bin 0x00907000

Add image support

Modification /home/tiansong/100ask_imx6ull_pro/uboot-imx/arch/arm/mach-imx/mx6/Kconfig [Note the path]

 config TARGET_MX6ULL_14X14_EVK
        bool "Support mx6ull_14x14_evk"
        select BOARD_LATE_INIT
        select DM
        select DM_THERMAL
        select MX6ULL
        imply CMD_DM

# 在 TARGET_MX6ULL_14X14_EVK 之下添加，注意与 100ask_imx6ull_pro_emmc_defconfig 中 CONFIG_TARGET_100ASK_IMX6ULL_PRO_EMMC=y 对应 
config TARGET_100ASK_IMX6ULL_PRO_EMMC
        bool "Support 100ask_imx6ull_pro_emmc"
        select BOARD_LATE_INIT
        select DM
        select DM_THERMAL
        select MX6ULL
        imply CMD_DM

# 文件末尾添加，注意路径
source "board/100ask/100ask_imx6ull_pro_emmc/Kconfig"

default device tree

Copy the device tree file corresponding to the public version

 tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx/arch/arm/dts$ pwd
/home/tiansong/100ask_imx6ull_pro/uboot-imx/arch/arm/dts

tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx/arch/arm/dts$ cp imx6ull-14x14-evk-emmc.dts 100ask_imx6ull_pro_emmc.dts
tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx/arch/arm/dts$ cp imx6ull-14x14-evk.dts 100ask_imx6ull_pro.dts
tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx/arch/arm/dts$ cp imx6ull-14x14-evk.dtsi 100ask_imx6ull_pro.dtsi
tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx/arch/arm/dts$ cp imx6ull-u-boot.dtsi 100ask_imx6ull_pro_u_boot.dtsi

Modified 100ask_imx6ull_pro_emmc.dts

 #include "imx6ull-14x14-evk.dts"
👉
#include "100ask_imx6ull_pro.dts"

Modified 100ask_imx6ull_pro.dts

 #include "imx6ull.dtsi"
#include "imx6ul-14x14-evk.dtsi"
#include "imx6ul-14x14-evk-u-boot.dtsi"

model = "i.MX6 ULL 14x14 EVK Board";
👉
#include "imx6ull.dtsi"
#include "100ask_imx6ull_pro.dtsi"
#include "100ask_imx6ull_pro_u_boot.dtsi"

model = "100ASK IMX6ULL PRO Board";

Modified 100ask_imx6ull_pro.dtsi

 # 1.新增 backlight_display 节点，注意在 / { 下
/ {    
    ...
    backlight_display: backlight-display {  // 新增节点
            compatible = "pwm-backlight";
            pwms = <&pwm1 0 1000>;
            brightness-levels = <0 4 8 16 32 64 128 255>;
            default-brightness-level = <6>;
            status = "okay";
    };
    ...
}

# 2.修改网口节点
&fec1 {
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_enet1>;
        phy-mode = "rmii";
        phy-handle = <&ethphy0>;
        status = "disabled";  // 修改
};

&fec2 {
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_enet2>;
        phy-mode = "rmii";
        phy-handle = <&ethphy1>;
        phy-reset-gpios = <&gpio5 6 GPIO_ACTIVE_LOW>;   // 新增
        phy-reset-duration = <50>;                      // 新增
        status = "okay";

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

                ethphy0: ethernet-phy@2 {
                        reg = <0>;
                        smsc,led-mode = <1>;
                        clocks = <&clks IMX6UL_CLK_ENET_REF>;
                        clock-names = "rmii-ref";
                };

                ethphy1: ethernet-phy@1 {
                        reg = <1>;
                        smsc,led-mode = <1>;
                        clocks = <&clks IMX6UL_CLK_ENET2_REF>;
                        clock-names = "rmii-ref";
                };
        };
};

pinctrl_enet2: enet2grp {
                fsl,pins = <
                        MX6UL_PAD_GPIO1_IO07__ENET2_MDC         0x1b0b0
                        MX6UL_PAD_GPIO1_IO06__ENET2_MDIO        0x1b0b0
                        MX6UL_PAD_ENET2_RX_EN__ENET2_RX_EN      0x1b0b0
                        MX6UL_PAD_ENET2_RX_ER__ENET2_RX_ER      0x1b0b0
                        MX6UL_PAD_ENET2_RX_DATA0__ENET2_RDATA00 0x1b0b0
                        MX6UL_PAD_ENET2_RX_DATA1__ENET2_RDATA01 0x1b0b0
                        MX6UL_PAD_ENET2_TX_EN__ENET2_TX_EN      0x1b0b0
                        MX6UL_PAD_ENET2_TX_DATA0__ENET2_TDATA00 0x1b0b0
                        MX6UL_PAD_ENET2_TX_DATA1__ENET2_TDATA01 0x1b0b0
                        MX6UL_PAD_ENET2_TX_CLK__ENET2_REF_CLK2  0x4001b031
                        /* used for phy reset*/
                        MX6ULL_PAD_SNVS_TAMPER6__GPIO5_IO06     0x79  // 增加复位引脚
                >;
    };

# 3.修改 lcd 节点
&lcdif {
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_lcdif_dat
                     &pinctrl_lcdif_ctrl>;
        reset-gpios = <&gpio3 4 GPIO_ACTIVE_LOW>;
        display = <&display0>;
        status = "okay";

        display0: display@0 {
                bits-per-pixel = <24>;
                bus-width = <24>;

                display-timings {
                        native-mode = <&timing0>;
                        timing0: timing0 {
                                clock-frequency = <50000000>;
                                hactive = <1024>;
                                vactive = <600>;
                                hfront-porch = <160>;
                                hback-porch = <140>;
                                hsync-len = <20>;
                                vback-porch = <20>;
                                vfront-porch = <12>;
                                vsync-len = <3>;

                                hsync-active = <0>;
                                vsync-active = <0>;
                                de-active = <1>;
                                pixelclk-active = <0>;
                        };
                };
        };
};


pinctrl_lcdif_ctrl: lcdifctrlgrp {
        fsl,pins = <
                MX6UL_PAD_LCD_CLK__LCDIF_CLK        0x79
                MX6UL_PAD_LCD_ENABLE__LCDIF_ENABLE  0x79
                MX6UL_PAD_LCD_HSYNC__LCDIF_HSYNC    0x79
                MX6UL_PAD_LCD_VSYNC__LCDIF_VSYNC    0x79
                /* used for lcd reset */
                MX6UL_PAD_LCD_RESET__GPIO3_IO04     0x1b0b0  // 增加复位引脚
        >;
};

Modified /home/tiansong/100ask_imx6ull_pro/uboot-imx/arch/arm/dts/Makefile

 dtb-$(CONFIG_MX6ULL) += \
...
imx6ull-14x14-evk.dtb \
100ask_imx6ull_pro.dtb \        # 新增
imx6ull-14x14-evk-emmc.dtb \
100ask_imx6ull_pro_emmc.dtb \   # 新增
...

Modified /home/tiansong/100ask_imx6ull_pro/uboot-imx/drivers/net/phy/phy.c

 int genphy_config_aneg(struct phy_device *phydev)
{
        int result;

        phy_reset(phydev);  // 新增

        if (phydev->autoneg != AUTONEG_ENABLE)
                return genphy_setup_forced(phydev);

        result = genphy_config_advert(phydev);

        // ...
}

3. Configuration and compilation

installation environment dependencies

 sudo apt install make
sudo apt install bison flex

Generate .config file

 tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx$ pwd
/home/tiansong/100ask_imx6ull_pro/uboot-imx

tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx$ make distclean

tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx$ make 100ask_imx6ull_pro_emmc_defconfig

Graphical configuration

 tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx$ make menuconfig

Confirm board level support, directory entry ARM architecture

Confirm the default device tree, directory entry Boot media --> Device Tree Control

enable SD/EMMC start, directory entry Boot media

Enable random MAC Address generation, directory entry Networking support

NIC support

• Directory Item Device Drivers/Network device support

• Directory Entry Device Drivers/Ethernet PHY(physical media interface) support

compile

 tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx$ make -j12

tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx$ ls u-boot-dtb.imx
u-boot-dtb.imx

4, programming test

Use 100ASK IMX6ULL Flashing Tool to write (for the programming method, please refer to "Embedded Linux Complete Development Manual")

View the debug serial port output of the development board

• startup log

• version View

• dhcp NIC test

• mmcinfo test

• lcd observation

5. File and code management

Default profile update

 # 根据当前配置生成默认配置文件
tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx$ make savedefconfig
scripts/kconfig/conf  --savedefconfig=defconfig Kconfig

tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx$ ls defconfig -l
-rw-rw-r-- 1 tiansong tiansong 1748  8月 26 21:34 defconfig

# 覆盖更新 100ask_imx6ull_pro_emmc_defconfig
tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx$ cp defconfig ./configs/100ask_imx6ull_pro_emmc_defconfig

local git repository commit

 tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx$ git status
HEAD detached at origin/imx_v2020.04_5.4.70_2.3.0
Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
        modified:   arch/arm/dts/Makefile
        modified:   arch/arm/mach-imx/mx6/Kconfig
        modified:   drivers/net/phy/phy.c

Untracked files:
  (use "git add <file>..." to include in what will be committed)
        arch/arm/dts/100ask_imx6ull_pro_emmc.dts
        board/100ask/
        configs/100ask_imx6ull_pro_emmc_defconfig
        include/configs/100ask_imx6ull_pro_emmc.h

no changes added to commit (use "git add" and/or "git commit -a")

 tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx$ git add -A
tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx$ git commit -m "适配 100ask_imx6ull_pro 开发板"

 tiansong@tiansong:~/100ask_imx6ull_pro/uboot-imx$ git log -1
commit 9f96361312aeeba348bf8b563a22479d6d2f6c23 (HEAD)
Author: TianSong <[e-mail]>
Date:   Fri Aug 26 21:38:36 2022 +0800

    适配 100ask_imx6ull_pro 开发板