I'm working on adding a new MT7628AN device that has a Fudan FM25Q128A SPI NOR flash. The datasheet says this device has a max FAST_READ clock of 100Mhz and regular read max clock of 50Mhz. How would I best represent this in the DTS? For testing I've set spi-max-frequency = <50000000>; and left the "fast-read" flag unset.
Is it worthwhile to enable fast-read, and if I do that, which clock should be used for spi-max-frequency?
Thanks.