iMX6ULL cannot boot from uSDHC

[blueskull]

A while I go I bought an iMX6ULL board, and it was designed to boot off uSDHC socket on its core module.

To reduce my pain during firmware development, I modified its boot source bootstrapping resistors, and it was modified to boot off standard size SDHC.

Well, I want to revert the modification, but it no longer boots from uSDHC, and it insists booting from standard SDHC, even after the bootstrapping has been reverted.

Is there any reason why it does this?

[nctnico]

If nothing works then you probably have set the eFuses. Cleaning a board usually doesn't do much good.

[mikerj]

Could it be related to this clock tuning bug?