Re: [PATCH] spi: spidev: Add compatible for external SPI ports on Kontron boards

[Frieder Schrempf]

On 14.07.20 21:29, Mark Brown wrote:
> 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?

Ok, I can do that, but when I resend my patches and add "compatible = 
'spidev'" to my DT I expect someone to complain again as my DT does not 
describe the hardware.

Seeing that there are quite a few DTs that still do it like this, I 
probably will try it still and also keep a patch in our tree to remove 
the warning so customers won't be getting worried.

But for obvious reasons this can't be considered a good solution and it 
seems somewhat disturbing that the maintainer needs to propose it 
because of lack of proper solutions ;)