topic Re: i.MX8MQ-EVK: eMMC: u-boot flashing issue in i.MX Processors

i.MX8MQ-EVK: eMMC: u-boot flashing issue

vipulkumar — Wed, 24 Feb 2021 09:53:22 GMT

I am using i.MX8MQ-EVK. I am able to write L4.19.35.1.1.0 imx8mq-evk images to eMMC using uuu (universal update utility) from https://github.com/NXPmicro/mfgtools/releases.

When i am trying to write u-boot on /dev/mmcblk0 using dd command, it's not working.

$ dd if=imx-boot-flash_evk.bin of=/dev/mmcblk0 bs=1k seek=33

After this , I rebooted the board but u-boot is not updated.

Please let me know if I am missing something.

igorpadykov — Wed, 24 Feb 2021 10:36:32 GMT

Hi vipulkumar

one can try to follow sect.4.3.4 Copying a bootloader image Linux Guide included in L4.19.35.1.1.0

Best regards
igor

vipulkumar — Wed, 24 Feb 2021 11:00:43 GMT

Hi,

Section 4.3.4 is talking about flashing u-boot to SD/MMC card.

But I wanted to flash it on eMMC.

I also tried the same command as mentioned in 4.3.4 sec to flash u-boot to eMMC but that didn't work for eMMC.

$ dd if=imx-boot-flash_evk.bin of=/dev/mmcblk0 bs=1k seek=33

vipulkumar — Wed, 24 Feb 2021 11:22:10 GMT

Hi,

Section 4.3.4 is talking about flashing u-boot to SD/MMC card.

But I wanted to flash it on eMMC.

I also tried the same command as mentioned in 4.3.4 sec to flash u-boot to eMMC but that didn't work for eMMC.

$ dd if=imx-boot-flash_evk.bin of=/dev/mmcblk0 bs=1k seek=33

igorpadykov — Wed, 24 Feb 2021 12:52:14 GMT

also one can look at

Best regards
igor

vipulkumar — Fri, 26 Feb 2021 11:58:19 GMT

Thanks for your reply.

This link doesn't have the information that I needed.

My scenario is:

1. I flashed 4.19.35 images to eMMC using uuu utility. It's working fine.

2. I created a SD card and booted h/w with it.

3. Now I wanted to flash new u-boot to eMMC partition. For this, I used following command:

$ dd if=imx-boot-evk.bin of=/dev/mmcblk0 bs=1k seek=33

4. After this I reboot the board but u-boot is not updated.

I am suspecting that u-boot is written in some other partition.