On 1/12/24 18:37, Mark Brown wrote: >> [ 6748.913400] spi-loopback-test spi13.0: elapsed time 532837 ns is >> shorter than minimum estimated time 82240000 ns > That's a *very* substantial error, it makes me suspect that the hardware > might be doing loopback at a stage before it actually clocks the bus and > doing something like just connecting the TX and RX FIFOs. Thanks, Mark! It was a problem on how the clocks were handled, I ended up with a higher frequency than I requested. Cheers, ta