Bios version: UP-APL01 R5.2 (UPA1AM52) 8/4/2020 allows for SPI3 to be enabled for pins 7, 13,15,29 and EXHAT Pins 2 and 4. What are the assignments for these pins? Which is MISO, MOSI, CLK, Chip select, etc.?
Please find the UP Squared pinout details on our Wiki here, https://github.com/up-board/up-community/wiki/Pinout_UP2