Hello, I was doing some tests on Rpi4 gpio and now I wanted to test the spi interface with a 7i90 table card, now I have looked for some information about it I have found that the hm2_rpspi driver has support for the Rpi version 2 and 3, so I don't know If building linuxcnc from source code version 2.8.1 or 2.9 has this aspect covered, then I have also found a thread here in the forum where the hm2_rpspi.c and spi_common_rpspi.h files are modified in this thread it is detailed:
forum.linuxcnc.org/18-computer/36879-raspberry-pi-4?start=410
, if possible if you can shed some light on it it would be interesting, greetings
