On Wed, Mar 06, 2019 at 06:57:12PM +0000, Trent Piepho wrote: > High speed receive operations may be less likely to have issues with > FIFO overflow when using DMA than when using PIO. > The eCSPI appears to insert a 4 bit pause after each word in DMA mode, > not done in PIO mode, which can make DMA transfers 50% slower than PIO. Wow, that's... innovative. If that's the case can't the decision function for switching to DMA be tweaked to take into account slave mode operation instead?
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