Boot from SPI flash

I couldn’t find any information on how I can connect SPI flash to ROCK Pi S and boot u-boot from it. How is it possible to change the order in which the boot is performed by the SPL?

There is no SPI flash for ROCK Pi S, the on board storage is SD Nand. By default, uSD card has higher boot priority.

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Hi Jack,

Thank you very much for your answer. I would like to connect an external SPI flash using the header of Rock Pi S. If there is no uSD or SD NAND connected, this would make the SPI flash the only device to boot from, so the priority doesn’t really matter.