[U-Boot] Query on u-boot

Hi,

I have a below query on u-boot bootup.

When UBOOT does not detect NOR flash during bootup it throws up an error message that indicates that uboot did not detect NOR flash and stops there. But when uboot does not detect QSPI flash it just gives a warning message that uboot sf_probe_failed, and comes to the uboot prompt.

Why is this behavior different for NOR flash and QSPI flash.

Regards, DP