Re: [PATCH v2] dt-bindings: net: nxp,sja1105: document spi-cpol/cpha

From: Vladimir Oltean
Date: Fri Nov 04 2022 - 12:53:53 EST


On Fri, Nov 04, 2022 at 09:09:02AM -0400, Krzysztof Kozlowski wrote:
> > I think that spi-cpha/spi-cpol belongs to spi-peripheral-props.yaml just
> > as much as the others do.
> >
> > The distinction "device specific, not controller specific" is arbitrary
> > to me. These are settings that the controller has to make in order to
> > talk to that specific peripheral. Same as many others in that file.
>
> Not every fruit is an orange, but every orange is a fruit. You do not
> put "color: orange" to schema for fruits. You put it to the schema for
> oranges.
>
> IOW, CPHA/CPOL are not valid for most devices, so they cannot be in
> spi-peripheral-props.yaml.

Ok, then this patch is not correct either. The "nxp,sja1105*" devices
need to have only "spi-cpha", and the "nxp,sja1110*" devices need to
have only "spi-cpol".