Ok, thank you. I cant find the overlay folder (probably because no overlays exist for sk-am64b).
I have found some information regarding SPIDEV for my board here: https://software-dl.ti.com/processor-sdk-sitara/esd/am64x/latest/exports/docs/linux/Foundational_Components/Kernel/Kernel_Drivers/SPI.html.
It actually show an example of a device tree. Do someone know if there exist overlays that is known to be working or do i have to create my own?
Regards
Tobias