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

[Frieder Schrempf]

On 02.07.20 17:07, Mark Brown wrote:
> On Thu, Jul 02, 2020 at 04:46:09PM +0200, Frieder Schrempf wrote:
>
> > My intention is to use the spidev driver in the default board DT for an
> > interface that is routed to an extension connector and has no dedicated
> > slave device attached onboard. So users can attach sensors, etc. with
> > userspace drivers without touching the kernel or DT.
>
> The expected way of doing this is to describe whatever was attached via
> DT when it's attached - the device is what has the compatible, not some
> connector in the middle of the connection.  The way you've got things
> set up if the device has a driver then they won't be able to instantiate
> the driver.

Ok thanks, got it. I will remove the spi device from the board DT and 
use an overlay if required. Now I got a reason to learn writing DT 
overlays ;)