On Tue, Jul 14, 2020 at 10:54:15AM +0200, Frieder Schrempf wrote:

> It would still be quite nice to benefit from the flexibility of DT overlays
> not only for the SPI use case. But before I come up with any custom
> solution, for now I will rather have the device in the DT statically.

> I just wonder if I need to keep the DT node for the device in a separate
> patch in our own tree, or if a node with a custom compatible string like for
> example "kontron,user-spi" would be accepted upstream, without a matching
> driver?

I'm having a hard time getting enthusiastic about it TBH - can you not
just use spidev and live with the warning?