iMX6 u-boot with a SD card question

[tomsong]

Hi,

     In order to flash U-boot to SD card the following two commands are given:

    sudo dd if=SPL of=/dev/sdc bs=1k seek=1

    sudo dd if=u-boot.img of=/dev/sdc bs=1k seek=69

     I understand the seek=1 in the first command which is to satisfy the 0x400 offset requirement of SD card (https://github.com/lentinj/u-boot/blob/master/doc/README.imximage). How about seek=69 in the second command? Can this offset be changed? If not where is the requirement documented?

    Thanks!

[tomsong]

Hi Aldo,

     Thanks! It is very helpful.

     Regards,

     Tom

[AldoG]

Hello,

Yes it can be changed it depends on how you build your SPL, you may take a look here:
https://source.codeaurora.org/external/imx/uboot-imx/tree/include/configs/imx6_spl.h?h=lf_v2022.04

Answering your original question 69 is the offset for uboot if SPL is used in the above file is explained as well.

Best regards,
Aldo.