[Yocto] Install image to eMMC from SD card

[petertseng]

Hi

I'm currently using i.MX Linux Yocto BSP (mickledore-6.1.22-2.0.0)

I can successfully generate the rootfs.wic file and deploy it to the SD card.

However, my customers iMX8MP board can only deploy image to the eMMC through the SD card.

How to use commands to install u-boot, kernel and rootfs on eMMC after booting from SD card?

Best Regards
Peter 

[Harvey021]

Hi,

You can refer to this - https://community.nxp.com/t5/i-MX-Processors/How-to-flash-eMMC-from-an-SDCard-on-i-MX6Q/m-p/880341

and the chapter<Booting Linux OS> from IMX_LINUX_USERS_GUIDE 

Regards

Harvey

[petertseng]

Hi Harvey,

I try to flash u-boot image to eMMC using.

$ umount -f /dev/mmcblk1p1
$ umount -f /dev/mmcblk1p2

## Erase the previous partition table
$ wipefs --all /dev/mmcblk1

## Erase u-boot environment variables
$ dd if=/dev/zero of=/dev/mmcblk1 bs=1M count=1
$ sync

## Flash u-boot image
$ dd if=imx-boot-imx8mpevk-sd.bin-flash_evk of=/dev/mmcblk1 bs=1k seek=32 conv=fsync
$ sync

But the u-boot image doesn't seem to be written to eMMC.

Because the old u-boot version is still displayed.

Best Regards
Peter 

[Harvey021]

Please refer to the link: How-to-uboot-flash-in-emmc-using-dd-command 

Regards

Harvey

[petertseng]

Hi Harvey,

So I should burn u-boot to /dev/mmcblk1boot0 ?

## Erase u-boot environment variables
$ echo 0 > /sys/block/mmcblk1boot0/force_ro
$ dd if=/dev/zero of=/dev/mmcblk1boot0 bs=1M count=1
$ sync
$ echo 1 > /sys/block/mmcblk1boot0/force_ro

## Flash u-boot image
$ echo 0 > /sys/block/mmcblk1boot0/force_ro
$ dd if=imx-boot-imx8mpevk-sd.bin-flash_evk of=/dev/mmcblk1boot0
$ sync
$ echo 1 > /sys/block/mmcblk1boot0/force_ro

Best Regards
Peter