Good...
We continue to get the truth about our fees with you)
The answer to the technical support for the inclusion of the SPI interface was simple - read http://wiki.friendlyarm.com/wiki/index. ... RK3399#SPI
It says about the Android operating system, and in their opinion, everything is the same in Ubuntu ...
The main question - WHERE !? is the file "rk3399-nanopi4-common.dtsi" or similar to it with the extension ".dts" or ".dtb" ???
Moreover, where is the "Boot" and the core of the system?
Wandering through the files of the operating system from the MANUFACTURER, I constantly stumble upon the file "Debian ... something there."
I have not got to the PCIe bus yet, I feel that there will be trouble in general.
So, the question (maybe to Armbian people or just thinking) - what to do to get access to the SPI interface, which the manufacturer talks about when selling his board ???