On 2/13/25 8:40 PM, Denzeel Oliva wrote: > - Added a default "fifo_depth = 64" to prevent crashes when "fifo-depth" > is missing in the device tree (avoids divide-by-zero issues). no, you shouldn't use fifo_depth as a fallback, it's misleading. fifo_depth shall be used only if all your SPI instances use the same FIFO size. If that's not the case, as in yours, you specify the FIFO depth via DT. You need to determine whether your IP works with 0 sized FIFOs and if not, make the the DT fifo-depth mandatory and check that its value is > 0. If the IP works with 0 sized FIFOs, you need to update the driver to allow that and let the fifo-depth property optional in DT.
