I have an UDOO Quad Rev.D and I would like to activate the serial port SPI2 in the kernel so I can use them from the i.mx6. I chose SPI2 because it is available on the header. I am not sure what I need to add to the kernel files to get it working. I have managed to compile the kernel and get the UARTS working, but I am clueless with the SPI interfaces. Has anyone been able to get a serial port working for the i.mx6? I guess if all else fails, I could bit bang it. Would be nice to get it working without having to bit bang though. Is there a driver for the SPI interface that is needed? Any help would be appreciated. I did find this link on freescale, so I am going to see what I can accomplish while I wait... https://community.freescale.com/thread/302612 Thanks!