FIELD_RETURN on i.MX8MNANOLPD4 EVK

[Peng Fan]

+Ye

在 1/9/2024 4:52 PM, Thomas Schaefer 写道:
> Hi all,
> 
> We are trying to enable FIELD RETURN on the NXP i.MX8MNano LPD4 EVK board.
> 
> We enabled Secure Boot in u-boot in the first step. After checking proper execution of a signed bootloader image we closed the board blowing the SEC_CONFIG fuse.
> 
> In the next step we created the board specific signature with UID of the CPU included to remove the FIELD RETURN lock. After that we were able to blow the FIELD_RETURN fuse with 'fuse prog 8 3 0x1' command. But now, the board cannot boot any more, it will hang after execution of the SPL bootloader part.
> 
> We can observe this behavior with both signed and unsigned bootloader images.
> 
> Is the FIELD_RETURN feature for the i.MX8MNano supported with u-boot v2024.01?
> 
> Best regards,
> Thomas
> 
> 
> Thomas Schäfer
> SW Design Engineer
> 
> thomas.schaefer at kontron.com
> www.kontron.com
> 
> 
> 
>              
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