I know it is possible to boot using QSPI0, with one or two flash chips. But is it possible to boot using QSPI1?
Yes, you can. Note however that you cannot use parallel mode with QuadSPI1 as there are not the pins for it on the chip. If you want to use parallel (8-bit) mode, you must use QuadSPI0.
The details of your application are a bit unclear, but, please, take a look at another discussion in which you might find an answer - https://community.freescale.com/thread/309836.
Regards, Naoum Gitnik.
Thank you for the clear response!
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