About QuadSPI serial flash BOOT in i.MX 7 Dual Applications Processor Reference Manual
It is described that QUAD enable bit is set before BOOT starts.
Is it possible to set up to QUAD enable bit in BOOT?
If you can set it, please tell me how.
Extracted QuadSPI serial flash BOOT operation in Section 188.8.131.52
For the QUAD mode boot, the Boot ROM expects the Quad Enable bit inside the QSPI flash to be already set before the booting starts. Therefore, the QUAD enable bit must be set in the non-volatile register of the flash at the time of programming.