IMX7 linux kernel freezing?

[jjamesson]

Hi, Community,

I am having an issue running Linux kernel on a custom hardware board, and I'm reaching out to get help. It seems that Linux is starting correctly, but then ends up freezing/stalling at some point, as I am not able to do anything beyond this point, including writing to terminal. This same build, however, works on the IMX7 Sabre board using only a different DDR config.

I have debugged it so far that I know that the stalling happens in cpu_startup_entry() function in linux-imx/init/main.c. Furthermore, I have attached the minicom output, where the stalling happens after the very last command.

Is this definitely a DDR configuration related issue?

With regards,

[jjamesson]

Issue resolved!
I fixed it by removing any irrelevant peripherals in the device tree for Linux.

Thank you, and this issue can be closed.

[gusarambula]

Hello James Jamesson,

Thank you for updating this thread and letting us know what the problem was! Hopefully it may help other community users.

Regards,

[jjamesson]

Status update:

I checked the DDR configuration with the stress tester tool, and it passed the test. So this problem is unlikely a DDR configuration problem.