20161213_jeffrey - silenceuncrio/diary GitHub Wiki

Index

  • 0930 - 目前具備的 tool 已經可以把 u-boot, kernel, dtb 和 rootfs 燒錄到 nandflash 去
  • 0945 - 先來燒錄 uboot
  • 1055 - 重開機看看... ok
  • 1100 - 來燒錄 linux kernel 吧
  • 1115 - 來燒錄 rootfs 吧
  • 1305 - 再整理一次燒錄 rootfs 的步驟
  • 1320 - Erasing rootfs partition 之前先把後續動作需要的工具放到 /tmp 去
  • 1350 - 先做 detach 吧
  • 1455 - 跟 winston 聊了一下他是怎麼克服寫 rootfs 這個問題
  • 1520 - 新增 uboot 的 ubi command 需要修改 mx6ul_14x14_evk.h
  • 1645 - 就算 uboot 有了 ubi 的 command 也沒啥用
  • 1710 - winston 提到 uboot 的 ubi command 是為了看目前已使用的大小...
  • 1720 - 修改 mx6ul_14x14_evk.h 來達到我們未來的 dual image nand flash 配置
  • 1940 - uboot mtdparts 的問題有解

0930

在 fsl-release-bsp/sources/meta-proscend/recipes-core/prosrc/prosrc_0.1.bb
的 RDEPENDS_${PN} 加上 imx-kobs 這個 recipe

build image

在 fsl-release-bsp\build_small\tmp\work\imx6ulevk-poky-linux-gnueabi\core-image-minimal\1.0-r0\rootfs\usr\bin
發現 kobs-ng
正是我們燒錄 u-boot 所需要的 tool

將 image 燒錄到 nand flash 去

目前具備的 tool 已經可以把 u-boot, kernel, dtb 和 rootfs 燒錄到 nandflash 去

  • kobs-ng
  • flash_erase
  • nandwrite
  • ubiformat
  • ubiattach
  • ubimkvol
  • mkdir
  • mount
  • umount
  • tar

0945

一個一個來

參考 https://github.com/silenceuncrio/diary/wiki/20160620_jeffrey

先來燒錄 uboot

把開發環境上的 images folder 直接掛載到 m300 上的 ~/images

確認 uboot image - u-boot.imx... ok

root@M300:~/images# ls
...
u-boot.imx
...

Erasing Boot partition - flash_erase /dev/mtd0 0 0... ok

root@M300:~/images# flash_erase /dev/mtd0 0 0
Erasing 128 Kibyte @ 2460000 -- 56 % complete flash_erase: Skipping bad block at 02480000
Erasing 128 Kibyte @ 3fe0000 -- 100 % complete

Flashing Bootloader - kobs-ng init -x -v --chip_0_device_path=/dev/mtd0 u-boot.imx... fail

< init -x -v --chip_0_device_path=/dev/mtd0 u-boot.imx
MTD CONFIG:
  chip_0_device_path = "/dev/mtd0"
  chip_1_device_path = "(null)"
  search_exponent = 2
  data_setup_time = 80
  data_hold_time = 60
  address_setup_time = 25
  data_sample_time = 6
  row_address_size = 3
  column_address_size = 2
  read_command_code1 = 0
  read_command_code2 = 48
  boot_stream_major_version = 1
  boot_stream_minor_version = 0
  boot_stream_sub_version = 0
  ncb_version = 3
  boot_stream_1_address = 0
  boot_stream_2_address = 0
unable to create a temporary file

該不會是漏了 Mounting debugfs 的步驟吧

Mounting debugfs - mount -t debugfs debugfs /sys/kernel/debug... fail

root@M300:~/images# mount -t debugfs debugfs /sys/kernel/debug
mount: mounting debugfs on /sys/kernel/debug failed: Device or resource busy

mount 到 /tmp/debug 吧... ok

root@M300:~/images# mount -t debugfs debugfs /tmp/debug

再做一次 Flashing Bootloader - kobs-ng init -x -v --chip_0_device_path=/dev/mtd0 u-boot.imx... fail

< init -x -v --chip_0_device_path=/dev/mtd0 u-boot.imx
MTD CONFIG:
  chip_0_device_path = "/dev/mtd0"
  chip_1_device_path = "(null)"
  search_exponent = 2
  data_setup_time = 80
  data_hold_time = 60
  address_setup_time = 25
  data_sample_time = 6
  row_address_size = 3
  column_address_size = 2
  read_command_code1 = 0
  read_command_code2 = 48
  boot_stream_major_version = 1
  boot_stream_minor_version = 0
  boot_stream_sub_version = 0
  ncb_version = 3
  boot_stream_1_address = 0
  boot_stream_2_address = 0
unable to create a temporary file

看來要查一下 source code 了

fsl-release-bsp\build_small\tmp\work\cortexa7hf-vfp-neon-poky-linux-gnueabi\imx-kobs\5.3-r0\imx-kobs-5.3\src

main.c

static char *tmp_file = ".tmp_kobs_ng";
static char *padding_1k_in_head(char *file_name)
{
	int to, from;
	int ret;
	int sz = getpagesize();

	from = open(file_name, O_RDONLY, S_IRUSR | S_IWUSR);
	to = open(tmp_file, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR);
	if (from < 0 || to < 0) {
		fprintf(stderr, "unable to create a temporary file\n");
		exit(5);
	}

	/* Padding 1k in the head. */
	lseek(to, 1024, SEEK_SET);

	do {
		/* copy a page each time. */
		ret = sendfile(to, from, NULL, sz);
	} while (ret > 0);

	close(to);
	close(from);

	/* change to the temporary file. */
	return tmp_file;
}

看來應該是 to = open(tmp_file, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR); 出了問題

我不應該在 m300 mount 到開發環境的目錄上做這件事

切換到 /tmp 去

再做一次 Flashing Bootloader - kobs-ng init -x -v --chip_0_device_path=/dev/mtd0 ~/images/u-boot.imx... ok

<t -x -v --chip_0_device_path=/dev/mtd0 ~/images/u-boot.imx
MTD CONFIG:
  chip_0_device_path = "/dev/mtd0"
  chip_1_device_path = "(null)"
  search_exponent = 2
  data_setup_time = 80
  data_hold_time = 60
  address_setup_time = 25
  data_sample_time = 6
  row_address_size = 3
  column_address_size = 2
  read_command_code1 = 0
  read_command_code2 = 48
  boot_stream_major_version = 1
  boot_stream_minor_version = 0
  boot_stream_sub_version = 0
  ncb_version = 3
  boot_stream_1_address = 0
  boot_stream_2_address = 0
         -- We add the 1k-padding to the uboot.
.tmp_kobs_ng: verifying using key '00000000000000000000000000000000'
.tmp_kobs_ng: is a valid bootstream for key '00000000000000000000000000000000'
mtd: opening: "/dev/mtd0"
mtd: '/dev/mtd0' bad block @ 0x2480000 (MTD)
NFC geometry :
        ECC Strength       : 4
        Page Size in Bytes : 2084
        Metadata size      : 10
        ECC Chunk Size in byte : 512
        ECC Chunk count        : 4
        Block Mark Byte Offset : 2018
        Block Mark Bit Offset  : 4
====================================================
mtd: opened '/dev/mtd0' - '(null)'
mtd: max_boot_stream_size_in_bytes = 33030144
mtd: boot_stream_size_in_bytes = 413696
mtd: boot_stream_size_in_pages = 202
mtd: #1 0x00100000 - 0x02080000 (0x00165000)
mtd: #2 0x02080000 - 0x04000000 (0x020e5000)
FCB
  m_u32Checksum = 0x00000000
  m_u32FingerPrint = 0x20424346
  m_u32Version = 0x01000000
  m_NANDTiming.m_u8DataSetup = 80
  m_NANDTiming.m_u8DataHold = 60
  m_NANDTiming.m_u8AddressSetup = 25
  m_NANDTiming.m_u8DSAMPLE_TIME = 6
  m_u32PageDataSize = 2048
  m_u32TotalPageSize = 2112
  m_u32SectorsPerBlock = 64
  m_u32NumberOfNANDs = 0
  m_u32TotalInternalDie = 0
  m_u32CellType = 0
  m_u32EccBlockNEccType = 2
  m_u32EccBlock0Size = 512
  m_u32EccBlockNSize = 512
  m_u32EccBlock0EccType = 2
  m_u32MetadataBytes = 10
  m_u32NumEccBlocksPerPage = 3
  m_u32EccBlockNEccLevelSDK = 0
  m_u32EccBlock0SizeSDK = 0
  m_u32EccBlockNSizeSDK = 0
  m_u32EccBlock0EccLevelSDK = 0
  m_u32NumEccBlocksPerPageSDK = 0
  m_u32MetadataBytesSDK = 0
  m_u32EraseThreshold = 0
  m_u32Firmware1_startingPage = 512
  m_u32Firmware2_startingPage = 16640
  m_u32PagesInFirmware1 = 202
  m_u32PagesInFirmware2 = 202
  m_u32DBBTSearchAreaStartAddress = 256
  m_u32BadBlockMarkerByte = 2018
  m_u32BadBlockMarkerStartBit = 4
  m_u32BBMarkerPhysicalOffset = 2048
  m_u32BCHType = 0
  m_NANDTMTiming.m_u32TMTiming2_ReadLatency = 0
  m_NANDTMTiming.m_u32TMTiming2_PreambleDelay = 0
  m_NANDTMTiming.m_u32TMTiming2_CEDelay = 0
  m_NANDTMTiming.m_u32TMTiming2_PostambleDelay = 0
  m_NANDTMTiming.m_u32TMTiming2_CmdAddPause = 0
  m_NANDTMTiming.m_u32TMTiming2_DataPause = 0
  m_NANDTMTiming.m_u32TMSpeed = 0
  m_NANDTMTiming.m_u32TMTiming1_BusyTimeout = 0
  m_u32DISBBM = 0
  m_u32BBMarkerPhysicalOffsetInSpareData = 0
  m_u32OnfiSyncEnable = 0
  m_NANDONFITiming.m_u32ONFISpeed = 0
  m_NANDONFITiming.m_u32ONFITiming_ReadLatency = 0
  m_NANDONFITiming.m_u32ONFITiming_CEDelay = 0
  m_NANDONFITiming.m_u32ONFITiming_PreambleDelay = 0
  m_NANDONFITiming.m_u32ONFITiming_PostambleDelay = 0
  m_NANDONFITiming.m_u32ONFITiming_CmdAddPause = 0
  m_NANDONFITiming.m_u32ONFITiming_DataPause = 0
  m_NANDONFITiming.m_u32ONFITiming_BusyTimeout = 0
  m_u32DISBBSearch = 0
  m_u32RandomizerEnable = 0
  m_u32ReadRetryEnable = 0
  m_u32ReadRetrySeqLength = 0
DBBT
  m_u32Checksum = 0x00000000
  m_u32FingerPrint = 0x54424244
  m_u32Version = 0x01000000
  m_u32DBBTNumOfPages = 1
BBTN#0
  uNAND = 0
  uNumberBB = 1
  BADBLOCKS:
     0x124
Firmware: image #0 @ 0x100000 size 0x65000 - available 0x1f80000
Firmware: image #1 @ 0x2080000 size 0x65000 - available 0x1f80000
-------------- Start to write the [ FCB ] -----
mtd: erasing @0:0x0-0x20000
mtd: Writing FCB0 [ @0:0x0 ] (840) *
mtd: erasing @0:0x20000-0x40000
mtd: Writing FCB1 [ @0:0x20000 ] (840) *
mtd: erasing @0:0x40000-0x60000
mtd: Writing FCB2 [ @0:0x40000 ] (840) *
mtd: erasing @0:0x60000-0x80000
mtd: Writing FCB3 [ @0:0x60000 ] (840) *
mtd_commit_bcb(FCB): status 0

-------------- Start to write the [ DBBT ] -----
mtd: erasing @0:0x80000-0xa0000
mtd: Writing DBBT0 [ @0:0x80000 ] (800) *
mtd: erasing @0:0xa0000-0xc0000
mtd: Writing DBBT1 [ @0:0xa0000 ] (800) *
mtd: erasing @0:0xc0000-0xe0000
mtd: Writing DBBT2 [ @0:0xc0000 ] (800) *
mtd: erasing @0:0xe0000-0x100000
mtd: Writing DBBT3 [ @0:0xe0000 ] (800) *
mtd_commit_bcb(DBBT): status 0

mtd: PUTTING down DBBT0 BBTN0 @0x82000 (0x800)
mtd: PUTTING down DBBT1 BBTN0 @0xa2000 (0x800)
mtd: PUTTING down DBBT2 BBTN0 @0xc2000 (0x800)
mtd: PUTTING down DBBT3 BBTN0 @0xe2000 (0x800)
---------- Start to write the [ .tmp_kobs_ng ]----
mtd: Writting .tmp_kobs_ng: #0 @0: 0x00100000 - 0x00165000
mtd: erasing @0:0x100000-0x120000
mtd: erasing @0:0x120000-0x140000
mtd: erasing @0:0x140000-0x160000
mtd: erasing @0:0x160000-0x180000
mtd: We write one page for save guard. *
mtd: Writting .tmp_kobs_ng: #1 @0: 0x02080000 - 0x020e5000
mtd: erasing @0:0x2080000-0x20a0000
mtd: erasing @0:0x20a0000-0x20c0000
mtd: erasing @0:0x20c0000-0x20e0000
mtd: erasing @0:0x20e0000-0x2100000
mtd: We write one page for save guard. *

1055

重開機看看... ok

再一次

  • Erasing Boot partition
    • flash_erase /dev/mtd0 0 0
    • ok
  • Flashing Bootloader
    • kobs-ng init -x -v --chip_0_device_path=/dev/mtd0 ~/images/u-boot.imx
    • ok
  • 重開機
    • ok

1100

來燒錄 linux kernel 吧

一樣是參考 https://github.com/silenceuncrio/diary/wiki/20160620_jeffrey

切到 /tmp 去後確認所需要的 image

mp# ls
etc         icos        icos_alive  icosmib     log         wdog.pid
root@M300:/tmp# ls ~/images/
...
zImage
...
zImage-imx6ul-14x14-evk.dtb
...

燒錄吧

  • Erasing Kernel partition
    • flash_erase /dev/mtd1 0 0
  • Flashing Kernel
    • nandwrite -p /dev/mtd1 -p ~/images/zImage
  • Erasing dtb partition
    • flash_erase /dev/mtd2 0 0
  • Flashing dtb
    • nandwrite -p /dev/mtd2 -p ~/images/zImage-imx6ul-14x14-evk.dtb

整個過程都很順利

重開機看看... ok

1115

來燒錄 rootfs 吧

  • Erasing rootfs partition
    • flash_erase /dev/mtd3 0 0
  • ubiformat
    • ubiformat /dev/mtd3
  • Attaching UBI partition
    • ubiattach /dev/ubi_ctrl -m 3
  • ubimkvol /dev/ubi0 -Nrootfs -m
  • mkdir -p /mnt/mtd3
  • mount -t ubifs ubi0:rootfs /mnt/mtd3
  • writting rootfs
    • tar -jxv -C /mnt/mtd3 - file="files/rootfs_nogpu.tar.bz2
  • Finishing rootfs write
    • frf
  • Unmounting rootfs partition
    • umount /mnt/mtd3

發現我沒有 frf 這個 tool

1305

frf 是 mfgtool 的 Command

就先不管它了

再整理一次燒錄 rootfs 的步驟

  • Erasing rootfs partition
    • flash_erase /dev/mtd3 0 0
  • ubiformat
    • ubiformat /dev/mtd3
  • Attaching UBI partition
    • ubiattach /dev/ubi_ctrl -m 3
  • ubimkvol /dev/ubi0 -Nrootfs -m
  • mkdir -p /mnt/mtd3
  • mount -t ubifs ubi0:rootfs /mnt/mtd3
  • writting rootfs
    • tar -jxv -C /mnt/mtd3 - file="files/rootfs_nogpu.tar.bz2
  • Unmounting rootfs partition
    • umount /mnt/mtd3

來吧...

  • Erasing rootfs partition
    • flash_erase /dev/mtd3 0 0
    • ok
root@M300:/tmp# flash_erase /dev/mtd3 0 0
Erasing 128 Kibyte @ 7e20000 -- 78 % complete flash_erase: Skipping bad block at 07e40000
Erasing 128 Kibyte @ 96e0000 -- 94 % complete flash_erase: Skipping bad block at 09700000
Erasing 128 Kibyte @ 97e0000 -- 94 % complete flash_erase: Skipping bad block at 09800000
Erasing 128 Kibyte @ 9f60000 -- 99 % complete flash_erase: Skipping bad block at 09f80000
flash_erase: Skipping bad block at 09fa0000
flash_erase: Skipping bad block at 09fc0000
flash_erase: Skipping bad block at 09fe0000
Erasing 128 Kibyte @ 9fe0000 -- 100 % complete
  • ubiformat
    • ubiformat /dev/mtd3
    • fail
root@M300:/tmp# ubiformat /dev/mtd3
-sh: ubiformat: command not found

command not found???

哈哈

rootfs 都被我 erease 掉了...

mfgtool 再燒回去...

1320

Erasing rootfs partition 之前先把後續動作需要的工具放到 /tmp 去

這次把開發環境上的 images folder 掛載到 m300 上的 /tmp/images

把燒錄 rootfs 需要的工具搬到 /tmp/tools 來

  • flash_erase
  • ubiformat
  • ubiattach
  • ubimkvol
  • mkdir
  • mount
  • tar
  • umount
root@M300:/tmp# cp /usr/sbin/ubiformat tools/
root@M300:/tmp# cp /usr/sbin/ubiattach tools/
root@M300:/tmp# cp /usr/sbin/ubimkvol tools/
root@M300:/tmp# cp /bin/mkdir tools/
root@M300:/tmp# cp /bin/mount tools/
root@M300:/tmp# cp /bin/tar tools/
root@M300:/tmp# cp /bin/umount tools/

來吧

  • Erasing rootfs partition
    • ./tools/flash_erase /dev/mtd3 0 0
    • ok
  • ubiformat
    • ./tools/ubiformat /dev/mtd3
    • fail
root@M300:/tmp# ./tools/ubiformat /dev/mtd3
ubiformat: error!: please, first detach mtd3 (/dev/mtd3) from ubi0

shit!

1350

先做 detach 吧

  • 把開發環境上的 images folder 掛載到 m300 上的 /tmp/images
  • 把燒錄 rootfs 需要的工具搬到 /tmp/tools 來
cp /usr/sbin/ubiformat tools/
cp /usr/sbin/ubiattach tools/
cp /usr/sbin/ubidetach tools/
cp /usr/sbin/ubimkvol tools/
cp /bin/mkdir tools/
cp /bin/mount tools/
cp /bin/tar tools/
cp /bin/umount tools/
  • detaching UBI partition
    • ./tools/ubidetach /dev/ubi_ctrl -m 3
    • fail
sr/sbin/ubidetach tools/
root@M300:/tmp# ./tools/ubidetach /dev/ubi_ctrl -m 3
ubidetach: error!: cannot detach mtd3
           error 16 (Device or resource busy)

先做 Unmounting rootfs partition

  • Unmounting rootfs partition
    • ./tools/umount /mnt/mtd3

1455

跟 winston 聊了一下他是怎麼克服寫 rootfs 這個問題

winston 給的一些建議

目前正在 run 的 rootfs 不要去寫 要寫再另外一塊

再告訴 u-boot 下一次開機的 rootfs 是另外一塊

winston 有提到他們的 uboot 有 ubi command 可以用

我也來找一下

1520

要新增 uboot 的 ubi command 需要修改 mx6ul_14x14_evk.h

可以參考 <u-boot-imx>\include\configs\cam_enc_4xx.h

/* UBI and NAND partitioning */
#ifdef CONFIG_CMD_NAND
#define CONFIG_CMD_UBI
#define CONFIG_CMD_UBIFS
#define CONFIG_CMD_MTDPARTS
#define CONFIG_RBTREE
#define CONFIG_LZO
#define CONFIG_MTD_DEVICE
#define CONFIG_MTD_PARTITIONS
#define MTDIDS_DEFAULT			"nand0=gpmi-nand"
#define MTDPARTS_DEFAULT \
	"mtdparts=gpmi-nand:128k(bootstrap),1024k(boot),768k(env),-(root)"
#else
#define MTDPARTS_DEFAULT		""
#endif

<u-boot-imx> 是個 path, 可由 bitbake u-boot-imx -c devshell 得知

上 patch 吧

  • 由 bitbake u-boot-imx -c devshell 進入 <u-boot-imx>
  • 建立新的 patch
    • quilt new add_ubi_commands.patch
  • notify Quilt about the files you plan to edit
    • quilt add include/configs/mx6ul_14x14_evk.h
  • 參考 <u-boot-imx>\include\configs\apx4devkit.h 新增 UBI 相關 command
  • generate the final patch that contains all your modifications
    • quilt refresh
  • copy the patch file and edit your recipe
    • copy the patch file from - \patches\add_ubi_commands.patch
    • copy the patch file to - fsl-release-bsp\sources\meta-proscend\recipes-bsp\u-boot\files\add_ubi_commands.patch
    • edit your recipe - fsl-release-bsp\sources\meta-proscend\recipes-bsp\u-boot\u-boot-imx_2015.04.bbappend

build image...

1645

就算 uboot 有了 ubi 的 command 也沒啥用

=> ubi part
Error, no UBI device/partition selected!

=> mtdparts
mtdids not defined, no default present

行為都跟 winston 熟悉的現象不一樣...

不過還是 commit 吧

commit 35cab0cdb32b8dfb281fe28e9d985b4d0987b393
Author: Jeffrey Lee <[email protected]>
Date:   Tue Dec 13 16:51:00 2016 +0800

    - prepare the tools for firmware upgrade(include uboot)
    - modify "imx6ul-14x14-evk-gpmi-weim.dts" to add ubi commands
(END)

1710

winston 提到 uboot 的 ubi command 是為了看目前已使用的大小...

結果用 df 就搞定了

root@M300:~# df
Filesystem           1024-blocks    Used Available Use% Mounted on
rootfs                  139800     27872    107092  21% /
ubi0:rootfs             139800     27872    107092  21% /
devtmpfs                 91208         4     91204   0% /dev
tmpfs                   255220       160    255060   0% /run
tmpfs                   255220       196    255024   0% /var/volatile

1720

參考 https://github.com/silenceuncrio/diary/wiki/20160810_jeffrey

修改 mx6ul_14x14_evk.h 來達到我們未來的 dual image nand flash 配置

image

應該可以偷點懶... 直接進 uboot 透過 setenv 來修改

我需要注意的就兩個變數

  • bootargs
  • bootcmd
=> printenv bootargs
bootargs=console=ttymxc0,115200 ubi.mtd=3 root=ubi0:rootfs rootfstype=ubifs mtdparts=gpmi-nand:64m(boot),16m(kernel),16m(dtb),-(rootfs)

=> printenv bootcmd
bootcmd=nand read ${loadaddr} 0x4000000 0x800000;nand read ${fdt_addr} 0x5000000 0x100000;bootz ${loadaddr} - ${fdt_addr}

先改 bootargs 的 mtdparts console=ttymxc0,115200 ubi.mtd=3 root=ubi0:rootfs rootfstype=ubifs mtdparts=gpmi-nand:64m(boot),16m(kernel),16m(dtb),64m(rootfs),-(others) 

...
UBI: scanning is finished
UBI error: vtbl_check: too large reserved_pebs 1236, good PEBs 512
UBI error: vtbl_check: volume table check failed: record 0, error 9
Volume table record 0 dump:
        reserved_pebs   1236
        alignment       1
        data_pad        0
        vol_type        1
        upd_marker      0
        name_len        6
        name            rootfs
        crc             0xa89e1774
UBI error: ubi_attach_mtd_dev: failed to attach mtd3, error -22
UBI error: ubi_init: cannot attach mtd3
snvs_rtc 20cc034.snvs-rtc-lp: setting system clock to 2016-12-13 11:33:46 UTC (1481628826)
UBIFS error (pid 1): ubifs_mount: cannot open "ubi0:rootfs", error -19
VFS: Cannot open root device "ubi0:rootfs" or unknown-block(0,0): error -19
Please append a correct "root=" boot option; here are the available partitions:
1f00           65536 mtdblock0  (driver?)
1f01           16384 mtdblock1  (driver?)
1f02           16384 mtdblock2  (driver?)
1f03           65536 mtdblock3  (driver?)
1f04           98304 mtdblock4  (driver?)
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
random: nonblocking pool is initialized

shit! 等明天再乖乖修改 mx6ul_14x14_evk.h 吧

1940

uboot mtdparts 的問題有解

=> mtdparts
mtdids not defined, no default present

參考 https://read01.com/7DnDR6.html

可以知道我們需要再參考 <u-boot-imx>\include\configs\cam_enc_4xx.h

#define MTDIDS_DEFAULT		"nand0=davinci_nand.0"
#define MTDPARTS_DEFAULT			\
	"mtdparts="				\
		"davinci_nand.0:"		\
			"128k(spl),"		\
			"384k(UBLheader),"	\
			"1m(u-boot),"		\
			"512k(env),"		\
			"-(ubi)"

根據這個來修改 mx6ul_14x14_evk.h 的話應該就能解掉了

不過我們目前並不需要從 uboot 對 nand flash 做任何燒錄的動作

可以先緩一下

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