Hi WabG,
I think this is a duplicate case from another forum case 06186025 link:
https://community.intel.com/t5/FPGA-SoC-And-CPLD-Boards-And/SoC-Cyclone-V-Configure-FPGA-fabric-SPI-Flash-from-HPS/m-p/1587039#M27257
I will close this thread and follow up from the other link.
Thanks.
Regards,
Aik Eu