I would like to clarify the question of SPI CS/MOSI swap on J1 connector.
If I understand chapter 4.5 of document PicoCOMA9X_Hardware_en.pdf well, in older hw J1-27 was SPI_CS and J1-29 was SPI_MOSI.
In newer hw J1-27 should be SPI_MOSI and J1-29 SPI_CS.
I tested those pins on module Rev. 1.20 (assuming it is a newer hw) but if I set pins via /sys/class/gpio interface then changes of gpio47 can be measured on J1-29 and changes of gpio48 on J1-27.
What is the problem? Are these J1 pins wired differently when configured as gpio or spi? Is our module (1AA4AC) really the one with fixed swap of pins?