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i.MX6ULL系统移植：uboot移植2 - 移植NXP官方uboot

程序员文章站 2022-04-28 08:04:17
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在移植过程中按照NXP官方文档《i.MX BSP Porting Guide》和正点原理提供资料均未移植成功，最后通过一个大佬博客讲解成功移植。以此记录。
原博客地址：https://blog.csdn.net/BBDS1ASD/article/details/108692727

一、解压NXP提供uboot

tar -vxjf uboot-imx-rel_imx_4.1.15_2.1.0_ga.tar.bz2

二、添加开发板配置文件

在uboot/configs/中，把mx6ull_14x14_evk_emmc_defconfig拷贝成自己的mx6ull_14x14_xxx_emmc_defconfig；

cp mx6ull_14x14_evk_emmc_defconfig mx6ull_14x14_xxx_emmc_defconfig

修改mx6ull_14x14_xxx_emmc_defconfig内容：

CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/mx6ull_xxx_emmc/imximage.cfg,MX6ULL_EVK_EMMC_REWORK"
CONFIG_TARGET_MX6ULL_xxx_EMMC=y

三、添加开发板头文件

有一些需要配置的信息，一般是在一个头文件里面配置，每个板子有一个。对于NXP官方的6ULL EVK板子，这个头文件就是mx6ullevk.h.
在uboot/include/configs/中，把mx6ullevk.h 拷贝成自己的 mx6ull_xxx_emmc.h；

修改mx6ull_xxx_emmc.h内容：

#ifndef __MX6ULLEVK_CONFIG_H
#define __MX6ULLEVK_CONFIG_H

改为

#ifndef __MX6ULL_XXX_EMMC_CONFIG_H
#define __MX6ULL_XXX_EMMC_CONFIG_H

四、添加开发板的板级文件夹

每个板子都有特有的文件，也叫做板级文件；这里我们将6ULL EVK的板级文件直接拷贝过来。
在 uboot/board/freescale/ 中，将 mx6ullevk/ 文件夹拷贝成自己的板级文件夹 mx6ull_xxx_emmc/；

cp mx6ullevk mx6ull_xxx_emmc

五、调整板级文件夹中文件内容

1、更改C文件名

在新的板级文件夹中，将mx6ullevk.c拷贝成mx6ull_xxx_emmc.c；

mv mx6ullevk.c mx6ull_xxx_emmc.c

2、修改Makefile

obj-y := mx6ull_xxx_emmc.o

3、修改imximage.cfg

PLUGIN board/freescale/mx6ullevk/plugin.bin 0x00907000

改为

PLUGIN board/freescale/mx6ull_xxx_emmc/plugin.bin 0x00907000

4、修改Kconfig

if TARGET_MX6ULL_xxx_EMMC

  config SYS_BOARD
	default "mx6ull_xxx_emmc"
  config SYS_VENDOR
	default "freescale"
 config SYS_SOC
	default "mx6"
  config SYS_CONFIG_NAME
	default "mx6ull_xxx_emmc"

endif

5、修改MAINTAINERS

MX6ULL_XXX_EMMC BOARD
M: Peng Fan <[email protected]>
S: Maintained
F: board/freescale/mx6ull_xxx_emmc/
F: include/configs/mx6ull_xxx_emmc.h
F: configs/mx6ull_14x14_xxx_emmc_defconfig

六、修改uboot的配置界面

修改文件arch/arm/cpu/armv7/mx6/Kconfig，添加如下内容：

config TARGET_MX6ULL_xxx_EMMC
 	bool "Support mx6ull_xxx_emmc"
 	select MX6ULL
 	select DM
 	select DM_THERMAL

source "board/freescale/mx6ull_xxx_emmc/Kconfig"

七、编译

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- distclean
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- mx6ull_14x14_xxx_emmc_defconfig
make V=1 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- -j4

八、测试

1、解压uboot

tar -vxjf uboot-imx-rel_imx_4.1.15_2.1.0_ga.tar.bz2

解压前：

[email protected]:~/linux/uboot/nxp_uboot$ ls
uboot-imx-rel_imx_4.1.15_2.1.0_ga.tar.bz2
[email protected]:~/linux/uboot/nxp_uboot$

解压后;

[email protected]:~/linux/uboot/nxp_uboot$ ls
uboot-imx-rel_imx_4.1.15_2.1.0_ga  uboot-imx-rel_imx_4.1.15_2.1.0_ga.tar.bz2
[email protected]:~/linux/uboot/nxp_uboot$

2、添加开发板配置文件

cd uboot-imx-rel_imx_4.1.15_2.1.0_ga/configs/
cp mx6ull_14x14_evk_emmc_defconfig mx6ull_14x14_lq_emmc_defconfig

命令执行前：

[email protected]:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga/configs$ ls -l mx6ull*
-rw-rw-r-- 1 onlylove onlylove 165 May  1  2017 mx6ull_14x14_ddr3_arm2_defconfig
-rw-rw-r-- 1 onlylove onlylove 194 May  1  2017 mx6ull_14x14_ddr3_arm2_emmc_defconfig
-rw-rw-r-- 1 onlylove onlylove 175 May  1  2017 mx6ull_14x14_ddr3_arm2_epdc_defconfig
-rw-rw-r-- 1 onlylove onlylove 179 May  1  2017 mx6ull_14x14_ddr3_arm2_nand_defconfig
-rw-rw-r-- 1 onlylove onlylove 179 May  1  2017 mx6ull_14x14_ddr3_arm2_qspi1_defconfig
-rw-rw-r-- 1 onlylove onlylove 181 May  1  2017 mx6ull_14x14_ddr3_arm2_spinor_defconfig
-rw-rw-r-- 1 onlylove onlylove 194 May  1  2017 mx6ull_14x14_ddr3_arm2_tsc_defconfig
-rw-rw-r-- 1 onlylove onlylove 159 May  1  2017 mx6ull_14x14_evk_defconfig
-rw-rw-r-- 1 onlylove onlylove 182 May  1  2017 mx6ull_14x14_evk_emmc_defconfig
-rw-rw-r-- 1 onlylove onlylove 173 May  1  2017 mx6ull_14x14_evk_nand_defconfig
-rw-rw-r-- 1 onlylove onlylove 173 May  1  2017 mx6ull_14x14_evk_qspi1_defconfig
-rw-rw-r-- 1 onlylove onlylove 164 May  1  2017 mx6ull_9x9_evk_defconfig
-rw-rw-r-- 1 onlylove onlylove 178 May  1  2017 mx6ull_9x9_evk_qspi1_defconfig
[email protected]:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga/configs$

命令执行后：

[email protected]:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga/configs$ ls -l mx6ull*
-rw-rw-r-- 1 onlylove onlylove 165 May  1  2017 mx6ull_14x14_ddr3_arm2_defconfig
-rw-rw-r-- 1 onlylove onlylove 194 May  1  2017 mx6ull_14x14_ddr3_arm2_emmc_defconfig
-rw-rw-r-- 1 onlylove onlylove 175 May  1  2017 mx6ull_14x14_ddr3_arm2_epdc_defconfig
-rw-rw-r-- 1 onlylove onlylove 179 May  1  2017 mx6ull_14x14_ddr3_arm2_nand_defconfig
-rw-rw-r-- 1 onlylove onlylove 179 May  1  2017 mx6ull_14x14_ddr3_arm2_qspi1_defconfig
-rw-rw-r-- 1 onlylove onlylove 181 May  1  2017 mx6ull_14x14_ddr3_arm2_spinor_defconfig
-rw-rw-r-- 1 onlylove onlylove 194 May  1  2017 mx6ull_14x14_ddr3_arm2_tsc_defconfig
-rw-rw-r-- 1 onlylove onlylove 159 May  1  2017 mx6ull_14x14_evk_defconfig
-rw-rw-r-- 1 onlylove onlylove 182 May  1  2017 mx6ull_14x14_evk_emmc_defconfig
-rw-rw-r-- 1 onlylove onlylove 173 May  1  2017 mx6ull_14x14_evk_nand_defconfig
-rw-rw-r-- 1 onlylove onlylove 173 May  1  2017 mx6ull_14x14_evk_qspi1_defconfig
-rw-rw-r-- 1 onlylove onlylove 182 Jul 20 06:50 mx6ull_14x14_lq_emmc_defconfig
-rw-rw-r-- 1 onlylove onlylove 164 May  1  2017 mx6ull_9x9_evk_defconfig
-rw-rw-r-- 1 onlylove onlylove 178 May  1  2017 mx6ull_9x9_evk_qspi1_defconfig
[email protected]:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga/configs$

修改mx6ull_14x14_xxx_emmc_defconfig内容：
修改前：

CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/mx6ullevk/imximage.cfg,MX6ULL_EVK_EMMC_REWORK"
CONFIG_ARM=y
CONFIG_ARCH_MX6=y
CONFIG_TARGET_MX6ULL_14X14_EVK=y
CONFIG_CMD_GPIO=y

修改后：

CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/mx6ull_lq_emmc/imximage.cfg,MX6ULL_EVK_EMMC_REWORK"
CONFIG_ARM=y
CONFIG_ARCH_MX6=y
CONFIG_TARGET_MX6ULL_LQ_EMMC=y
CONFIG_CMD_GPIO=y

3、添加开发板头文件

cd include/configs/
cp mx6ullevk.h mx6ull_lq_emmc.h

命令执行前：

[email protected]:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga/include/configs$ ls -l mx6ull*
-rw-rw-r-- 1 onlylove onlylove  3136 May  1  2017 mx6ull_ddr3_arm2.h
-rw-rw-r-- 1 onlylove onlylove 10386 May  1  2017 mx6ullevk.h
[email protected]:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga/include/configs$

命令执行后：

[email protected]:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga/include/configs$ ls -l mx6ull*
-rw-rw-r-- 1 onlylove onlylove  3136 May  1  2017 mx6ull_ddr3_arm2.h
-rw-rw-r-- 1 onlylove onlylove 10386 May  1  2017 mx6ullevk.h
-rw-rw-r-- 1 onlylove onlylove 10386 Jul 20 06:55 mx6ull_lq_emmc.h
[email protected]:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga/include/configs$

修改mx6ull_xxx_emmc.h内容：

vim mx6ull_lq_emmc.h

#ifndef __MX6ULLEVK_CONFIG_H
#define __MX6ULLEVK_CONFIG_H

改为

#ifndef __MX6ULL_LQ_EMMC_CONFIG_H
#define __MX6ULL_LQ_EMMC_CONFIG_H

4、添加开发板板级文件夹

cd board/freescale/
cp -r mx6ullevk mx6ull_lq_emmc

命令执行前：

[email protected]:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga/board/freescale$ ls -l mx6ull*
mx6ull_ddr3_arm2:
total 48
-rw-rw-r-- 1 onlylove onlylove  2768 May  1  2017 imximage.cfg
-rw-rw-r-- 1 onlylove onlylove   190 May  1  2017 Kconfig
-rw-rw-r-- 1 onlylove onlylove   243 May  1  2017 Makefile
-rw-rw-r-- 1 onlylove onlylove 31432 May  1  2017 mx6ull_ddr3_arm2.c
-rw-rw-r-- 1 onlylove onlylove  2675 May  1  2017 plugin.S

mx6ullevk:
total 64
-rw-rw-r-- 1 onlylove onlylove  2786 May  1  2017 imximage.cfg
-rw-rw-r-- 1 onlylove onlylove  2851 May  1  2017 imximage_lpddr2.cfg
-rw-rw-r-- 1 onlylove onlylove   183 May  1  2017 Kconfig
-rw-rw-r-- 1 onlylove onlylove   196 May  1  2017 MAINTAINERS
-rw-rw-r-- 1 onlylove onlylove   236 May  1  2017 Makefile
-rw-rw-r-- 1 onlylove onlylove 30135 May  1  2017 mx6ullevk.c
-rw-rw-r-- 1 onlylove onlylove  5079 May  1  2017 plugin.S
-rw-rw-r-- 1 onlylove onlylove   716 May  1  2017 README
[email protected]:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga/board/freescale$

命令执行后：

[email protected]:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga/board/freescale$ ls -l mx6ull*
mx6ull_ddr3_arm2:
total 48
-rw-rw-r-- 1 onlylove onlylove  2768 May  1  2017 imximage.cfg
-rw-rw-r-- 1 onlylove onlylove   190 May  1  2017 Kconfig
-rw-rw-r-- 1 onlylove onlylove   243 May  1  2017 Makefile
-rw-rw-r-- 1 onlylove onlylove 31432 May  1  2017 mx6ull_ddr3_arm2.c
-rw-rw-r-- 1 onlylove onlylove  2675 May  1  2017 plugin.S

mx6ullevk:
total 64
-rw-rw-r-- 1 onlylove onlylove  2786 May  1  2017 imximage.cfg
-rw-rw-r-- 1 onlylove onlylove  2851 May  1  2017 imximage_lpddr2.cfg
-rw-rw-r-- 1 onlylove onlylove   183 May  1  2017 Kconfig
-rw-rw-r-- 1 onlylove onlylove   196 May  1  2017 MAINTAINERS
-rw-rw-r-- 1 onlylove onlylove   236 May  1  2017 Makefile
-rw-rw-r-- 1 onlylove onlylove 30135 May  1  2017 mx6ullevk.c
-rw-rw-r-- 1 onlylove onlylove  5079 May  1  2017 plugin.S
-rw-rw-r-- 1 onlylove onlylove   716 May  1  2017 README

mx6ull_lq_emmc:
total 64
-rw-rw-r-- 1 onlylove onlylove  2786 Jul 20 07:04 imximage.cfg
-rw-rw-r-- 1 onlylove onlylove  2851 Jul 20 07:04 imximage_lpddr2.cfg
-rw-rw-r-- 1 onlylove onlylove   183 Jul 20 07:04 Kconfig
-rw-rw-r-- 1 onlylove onlylove   196 Jul 20 07:04 MAINTAINERS
-rw-rw-r-- 1 onlylove onlylove   236 Jul 20 07:04 Makefile
-rw-rw-r-- 1 onlylove onlylove 30135 Jul 20 07:04 mx6ullevk.c
-rw-rw-r-- 1 onlylove onlylove  5079 Jul 20 07:04 plugin.S
-rw-rw-r-- 1 onlylove onlylove   716 Jul 20 07:04 README
[email protected]:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga/board/freescale$

5、调整板级文件夹中内容

1、更改C文件名

mv mx6ullevk.c mx6ull_lq_emmc.c

2、修改Makefile

修改前：

# (C) Copyright 2015 Freescale Semiconductor, Inc.
#
# SPDX-License-Identifier:	GPL-2.0+
#

obj-y  := mx6ullevk.o

extra-$(CONFIG_USE_PLUGIN) :=  plugin.bin
$(obj)/plugin.bin: $(obj)/plugin.o
	$(OBJCOPY) -O binary --gap-fill 0xff $< [email protected]

修改后：

# (C) Copyright 2015 Freescale Semiconductor, Inc.
#
# SPDX-License-Identifier:	GPL-2.0+
#

obj-y  := mx6ull_lq_emmc.o

extra-$(CONFIG_USE_PLUGIN) :=  plugin.bin
$(obj)/plugin.bin: $(obj)/plugin.o
	$(OBJCOPY) -O binary --gap-fill 0xff $< [email protected]

3、修改imximage.cfg

修改前：

/*
 * Copyright (C) 2016 Freescale Semiconductor, Inc.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 *
 * Refer docs/README.imxmage for more details about how-to configure
 * and create imximage boot image
 *
 * The syntax is taken as close as possible with the kwbimage
 */

#define __ASSEMBLY__
#include <config.h>

/* image version */

IMAGE_VERSION 2

/*
 * Boot Device : one of
 * spi/sd/nand/onenand, qspi/nor
 */

#ifdef CONFIG_SYS_BOOT_QSPI
BOOT_FROM	qspi
#elif defined(CONFIG_SYS_BOOT_EIMNOR)
BOOT_FROM	nor
#else
BOOT_FROM	sd
#endif

#ifdef CONFIG_USE_PLUGIN
/*PLUGIN    plugin-binary-file    IRAM_FREE_START_ADDR*/
PLUGIN	board/freescale/mx6ull_lq_emmc/plugin.bin 0x00907000
#else

#ifdef CONFIG_SECURE_BOOT
CSF CONFIG_CSF_SIZE
#endif

/*
 * Device Configuration Data (DCD)
 *
 * Each entry must have the format:
 * Addr-type           Address        Value
 *
 * where:
 *	Addr-type register length (1,2 or 4 bytes)
 *	Address	  absolute address of the register
 *	value	  value to be stored in the register
 */

/* Enable all clocks */
DATA 4 0x020c4068 0xffffffff
DATA 4 0x020c406c 0xffffffff
DATA 4 0x020c4070 0xffffffff
DATA 4 0x020c4074 0xffffffff
DATA 4 0x020c4078 0xffffffff
DATA 4 0x020c407c 0xffffffff
DATA 4 0x020c4080 0xffffffff

DATA 4 0x020E04B4 0x000C0000
DATA 4 0x020E04AC 0x00000000
DATA 4 0x020E027C 0x00000030
DATA 4 0x020E0250 0x00000030
DATA 4 0x020E024C 0x00000030
DATA 4 0x020E0490 0x00000030
DATA 4 0x020E0288 0x000C0030
DATA 4 0x020E0270 0x00000000
DATA 4 0x020E0260 0x00000030
DATA 4 0x020E0264 0x00000030
DATA 4 0x020E04A0 0x00000030
DATA 4 0x020E0494 0x00020000
DATA 4 0x020E0280 0x00000030
DATA 4 0x020E0284 0x00000030
DATA 4 0x020E04B0 0x00020000
DATA 4 0x020E0498 0x00000030
DATA 4 0x020E04A4 0x00000030
DATA 4 0x020E0244 0x00000030
DATA 4 0x020E0248 0x00000030
DATA 4 0x021B001C 0x00008000
DATA 4 0x021B0800 0xA1390003
DATA 4 0x021B080C 0x00000004
DATA 4 0x021B083C 0x41640158
DATA 4 0x021B0848 0x40403237
DATA 4 0x021B0850 0x40403C33
DATA 4 0x021B081C 0x33333333
DATA 4 0x021B0820 0x33333333
DATA 4 0x021B082C 0xf3333333
DATA 4 0x021B0830 0xf3333333
DATA 4 0x021B08C0 0x00944009
DATA 4 0x021B08b8 0x00000800
DATA 4 0x021B0004 0x0002002D
DATA 4 0x021B0008 0x1B333030
DATA 4 0x021B000C 0x676B52F3
DATA 4 0x021B0010 0xB66D0B63
DATA 4 0x021B0014 0x01FF00DB
DATA 4 0x021B0018 0x00201740
DATA 4 0x021B001C 0x00008000
DATA 4 0x021B002C 0x000026D2
DATA 4 0x021B0030 0x006B1023
DATA 4 0x021B0040 0x0000004F
DATA 4 0x021B0000 0x84180000
DATA 4 0x021B0890 0x00400000
DATA 4 0x021B001C 0x02008032
DATA 4 0x021B001C 0x00008033
DATA 4 0x021B001C 0x00048031
DATA 4 0x021B001C 0x15208030
DATA 4 0x021B001C 0x04008040
DATA 4 0x021B0020 0x00000800
DATA 4 0x021B0818 0x00000227
DATA 4 0x021B0004 0x0002552D
DATA 4 0x021B0404 0x00011006
DATA 4 0x021B001C 0x00000000

#endif

修改后

/*
 * Copyright (C) 2016 Freescale Semiconductor, Inc.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 *
 * Refer docs/README.imxmage for more details about how-to configure
 * and create imximage boot image
 *
 * The syntax is taken as close as possible with the kwbimage
 */

#define __ASSEMBLY__
#include <config.h>

/* image version */

IMAGE_VERSION 2

/*
 * Boot Device : one of
 * spi/sd/nand/onenand, qspi/nor
 */

#ifdef CONFIG_SYS_BOOT_QSPI
BOOT_FROM	qspi
#elif defined(CONFIG_SYS_BOOT_EIMNOR)
BOOT_FROM	nor
#else
BOOT_FROM	sd
#endif

#ifdef CONFIG_USE_PLUGIN
/*PLUGIN    plugin-binary-file    IRAM_FREE_START_ADDR*/
PLUGIN	board/freescale/mx6ullevk/plugin.bin 0x00907000
#else

#ifdef CONFIG_SECURE_BOOT
CSF CONFIG_CSF_SIZE
#endif

/*
 * Device Configuration Data (DCD)
 *
 * Each entry must have the format:
 * Addr-type           Address        Value
 *
 * where:
 *	Addr-type register length (1,2 or 4 bytes)
 *	Address	  absolute address of the register
 *	value	  value to be stored in the register
 */

/* Enable all clocks */
DATA 4 0x020c4068 0xffffffff
DATA 4 0x020c406c 0xffffffff
DATA 4 0x020c4070 0xffffffff
DATA 4 0x020c4074 0xffffffff
DATA 4 0x020c4078 0xffffffff
DATA 4 0x020c407c 0xffffffff
DATA 4 0x020c4080 0xffffffff

DATA 4 0x020E04B4 0x000C0000
DATA 4 0x020E04AC 0x00000000
DATA 4 0x020E027C 0x00000030
DATA 4 0x020E0250 0x00000030
DATA 4 0x020E024C 0x00000030
DATA 4 0x020E0490 0x00000030
DATA 4 0x020E0288 0x000C0030
DATA 4 0x020E0270 0x00000000
DATA 4 0x020E0260 0x00000030
DATA 4 0x020E0264 0x00000030
DATA 4 0x020E04A0 0x00000030
DATA 4 0x020E0494 0x00020000
DATA 4 0x020E0280 0x00000030
DATA 4 0x020E0284 0x00000030
DATA 4 0x020E04B0 0x00020000
DATA 4 0x020E0498 0x00000030
DATA 4 0x020E04A4 0x00000030
DATA 4 0x020E0244 0x00000030
DATA 4 0x020E0248 0x00000030
DATA 4 0x021B001C 0x00008000
DATA 4 0x021B0800 0xA1390003
DATA 4 0x021B080C 0x00000004
DATA 4 0x021B083C 0x41640158
DATA 4 0x021B0848 0x40403237
DATA 4 0x021B0850 0x40403C33
DATA 4 0x021B081C 0x33333333
DATA 4 0x021B0820 0x33333333
DATA 4 0x021B082C 0xf3333333
DATA 4 0x021B0830 0xf3333333
DATA 4 0x021B08C0 0x00944009
DATA 4 0x021B08b8 0x00000800
DATA 4 0x021B0004 0x0002002D
DATA 4 0x021B0008 0x1B333030
DATA 4 0x021B000C 0x676B52F3
DATA 4 0x021B0010 0xB66D0B63
DATA 4 0x021B0014 0x01FF00DB
DATA 4 0x021B0018 0x00201740
DATA 4 0x021B001C 0x00008000
DATA 4 0x021B002C 0x000026D2
DATA 4 0x021B0030 0x006B1023
DATA 4 0x021B0040 0x0000004F
DATA 4 0x021B0000 0x84180000
DATA 4 0x021B0890 0x00400000
DATA 4 0x021B001C 0x02008032
DATA 4 0x021B001C 0x00008033
DATA 4 0x021B001C 0x00048031
DATA 4 0x021B001C 0x15208030
DATA 4 0x021B001C 0x04008040
DATA 4 0x021B0020 0x00000800
DATA 4 0x021B0818 0x00000227
DATA 4 0x021B0004 0x0002552D
DATA 4 0x021B0404 0x00011006
DATA 4 0x021B001C 0x00000000

#endif

4、修改Kconfig

修改前：

if TARGET_MX6ULL_14X14_EVK || TARGET_MX6ULL_9X9_EVK

config SYS_BOARD
	default "mx6ullevk"

config SYS_VENDOR
	default "freescale"

config SYS_CONFIG_NAME
	default "mx6ullevk"

endif

修改后：

if TARGET_MX6ULL_LQ_EMMC

  config SYS_BOARD
	default "mx6ull_lq_emmc"
	
  config SYS_VENDOR
	default "freescale"
	
 config SYS_SOC
	default "mx6"
	
  config SYS_CONFIG_NAME
	default "mx6ull_lq_emmc"

endif

5、修改MAINTAINERS

修改前：

MX6ULLEVK BOARD
M:	Peng Fan <[email protected]>
S:	Maintained
F:	board/freescale/mx6ullevk/
F:	include/configs/mx6ullevk.h
F:	configs/mx6ull_14x14_evk_defconfig
F:	configs/mx6ull_9x9_evk_defconfig

修改后：

MX6ULL_LQ_EMMC BOARD
M: Peng Fan <[email protected]>
S: Maintained
F: board/freescale/mx6ull_lq_emmc/
F: include/configs/mx6ull_lq_emmc.h
F: configs/mx6ull_14x14_lq_emmc_defconfig

6、修改uboot配置界面

cd arch/arm/cpu/armv7/mx6/
vim Kconfig

在 207 行加入如下内容：

config TARGET_MX6ULL_LQ_EMMC
 	bool "Support mx6ull_lq_emmc"
 	select MX6ULL
 	select DM
 	select DM_THERMAL

在最后一行的 endif 的前一行添加如下内容：

source "board/freescale/mx6ull_lq_emmc/Kconfig"

7、编译

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- distclean
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- mx6ull_14x14_lq_emmc_defconfig
make V=1 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- -j4

部分编译信息：

Image Type:   Freescale IMX Boot Image
Image Ver:    2 (i.MX53/6/7 compatible)
Mode:         DCD
Data Size:    425984 Bytes = 416.00 kB = 0.41 MB
Load Address: 877ff420
Entry Point:  87800000

8、烧录到SD卡

sudo dd if=u-boot.imx of=/dev/sdb bs=1k seek=1 conv=fsync

烧录结果：

[email protected]:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga$ sudo dd if=u-boot.imx of=/dev/sdb bs=1k seek=1 conv=fsync
[sudo] password for onlylove: 
415+0 records in
415+0 records out
424960 bytes (425 kB, 415 KiB) copied, 0.0668331 s, 6.4 MB/s
[email protected]:~/linux/uboot/nxp_uboot/uboot-imx-rel_imx_4.1.15_2.1.0_ga$

9、将SD卡插入开发板进行验证

U-Boot 2016.03 (Jul 20 2021 - 08:25:23 -0700)

CPU:   Freescale i.MX6ULL rev1.1 69 MHz (running at 396 MHz)
CPU:   Industrial temperature grade (-40C to 105C) at 39C
Reset cause: POR
Board: MX6ULL 14x14 EVK
I2C:   ready
DRAM:  512 MiB
MMC:   FSL_SDHC: 0, FSL_SDHC: 1
*** Warning - bad CRC, using default environment

Display: TFT43AB (480x272)
Video: 480x272x24
In:    serial
Out:   serial
Err:   serial
switch to partitions #0, OK
mmc0 is current device
Net:   Board Net Initialization Failed
No ethernet found.
Normal Boot
Hit any key to stop autoboot:  0
switch to partitions #0, OK
mmc0 is current device
switch to partitions #0, OK
mmc0 is current device
reading boot.scr
** Unable to read file boot.scr **
reading zImage
** Unable to read file zImage **
Booting from net ...
No ethernet found.
No ethernet found.
Bad Linux ARM zImage magic!
=>

通过uboot启动信息可以看出，编译成功。

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