I have a custom board with an i.mx 6sx which is based on the sabresd desgin.
I've connected a n25Q256a QSPI device to QSPI 1B.
Is it possible to boot from this device?
In my tests i see that on POR (or with bmode) only the QSPI 1A or QSPI2A are accessed be the boot ROM.
also, the fuses / GPIOS can only be configured for QSPI1 or QSPI2 and does not give an option to configure A or B inside a specific controller.