I have a device based on imx233-Olinuxino-Nano.
The Arch Linux Arm distro boots and works.
However, there is a slave device on my board that is connected to SPI of CPU. It is supported by kernel, but, obviously, generic device tree for Olinuxino doesn't contain its description.
How do I make it show in /dev directory? I know I can alter device tree in Linux kernel and recompile that device tree, but I heard that it's possible to supply device tree overlay file to alter the device tree on boot. How do I do that? The information that I found up to now is scarce and vague.