The @mb_name@ has @amountspi@ SPI interfaces. They can be found on the extension headers and can be tested with a loopback test. ^ Interface ^ linux filesystem ^ @spi_table@ For the loopback test you need a bridge between SPI_MOSI and SPI_MISO: @spi_bridges@ echo -n -e "\x01\x0F" | spi-pipe -d -s 10000000 | hexdump (e.g. echo -n -e "\x01\x0F" | spi-pipe -d /dev/spidev1.0 -s 10000000 | hexdump)