On Wed, Jan 27, 2021 at 11:41 PM Brian Hutchinson via lists.yoctoproject.org
<b.hutchman=gmail.com@lists.yoctoproject.org> wrote:

>
> Ok, stumped now.  I created a /etc/fw_env.config file with:
> /dev/mmcblk1            0x400000        0x1000
>
> Also tried:
> /dev/mmcblk1 0x0 0x1000
>
> ... mmcblk1 is the sdcard I'm booting.
>
> Now I'm getting:
>
> root@imx8mmevk:/etc# fw_printenv
> Cannot read environment, using default
> Cannot read default environment from file
>
> This is first time I'm using sdcards or eMMC to store u-boot env, always
> did it in NOR before so I'm kinda lost at the moment.
>
> Anyone know where the u-boot env is on sdcard (or eMMC)?
>
>
>
Update ... feeling like I'm losing my mind now.

fw_env.config must be sensitive to spaces or tabs or something.

I messed around with it some more and it magically started working with my
imx8mm-evk board with fw_env.config containing:

/dev/mmcblk1  0x400000    0x1000

I don't know why that didn't work before ... I tried all kinds of things to
get this to work and really can't explain why it just started working.  To
test, I used fw_setenv to set a variable and rebooted and stopped in u-boot
and did printenv and sure enough the variable I set is there.

Regards,

Brian