Hi, @pfarre!
Regarding having several device trees please check the threads below the related documentation and other threads about it:
- Adding new overlays to yocto image - #4 by henrique.tx
- Adding custom overlay to overlays.txt - #3 by huseyinkozan
- Build Device Tree Overlays from my layer - #2 by henrique.tx
Regarding the failure when building, I would like to go through some topics:
- Since you are migrating from a NAND module to an eMMC, is it possible that some of your NAND-specific is bringing some issue to the eMMC module?
- Have you tried to build the default Reference Minimal Image for colibri-imx7-emmc? This is a good thing to try out (like a “hello world” just to check if your setup is healthy).
- As for the image with secure boot, are you using our meta-toradex-security layer? This is they way-to-go to have a smoother experience:
This is the related documentation in Toradex Developer: https://developer.toradex.com/torizon/security/secure-boot-on-torizoncore/
Best regards,