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NAND boot issue

Michael Po
Intellectual 290 points

I have a made a minimal u-boot with just nand support. When flashed to the first sector, it works when I power cycle the board, but any other way of rebooting (reset button, or normal linux reboot) lead to the bootloader failing to load and ending in the XMODEM fallback mode.

Whats going on?

Is it possible that some pins of the TI mux might not be tristated and make the read of the boot pins fail in some way?

  • 0
    TI__Genius 11470 points

    Hello Michael,

    When I use NAND 1st stage u-boot image built with "ti8148_evm_min_nand" configuration, I cannot encounter this issue; all kinds of "reset" are working. This is on the MISTRAL's EVM. So probably it is something with the configuration, I cannot tell what. You could try to start with the "ti8148_evm_min_nand" configuration code, applying the desired modifications step by step, checking whether it will occur.

    Thank you.

    BR

    Vladimir