linux-kernel - Re: [EXT] Re: [PATCH] dt-bindings: spi: Convert Freescale DSPI to json schema

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Message-ID: <20210316101506.rkqcxkw6slv4vuhr@skbuf>
Date:   Tue, 16 Mar 2021 12:15:06 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Kuldeep Singh <kuldeep.singh@....com>
Cc:     "linux-spi@...r.kernel.org" <linux-spi@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>
Subject: Re: [EXT] Re: [PATCH] dt-bindings: spi: Convert Freescale DSPI to
 json schema

On Tue, Mar 16, 2021 at 06:08:17AM +0000, Kuldeep Singh wrote:
> Compatible entries in conjugation require enum and const pair.
> For example, ls1012a.dtsi uses compatible = "fsl,ls1012a-dspi","fsl,ls1021a-v1.0-dspi";
> Same goes for LS1028 as well.
> 
> Therefore, can't mention the compatible entry as single entity otherwise
> it may fail "make dt_binding_check" and "make dtbs_check".
> 
> > 
> > > +examples:
> > > +  - |
> > > +    #include <dt-bindings/clock/fsl,qoriq-clockgen.h>
> > > +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> > > +
> > > +    soc {
> > > +        #address-cells = <2>;
> > > +        #size-cells = <2>;
> > > +
> > > +        spi@...0000 {
> > > +            compatible = "fsl,ls1028a-dspi", "fsl,ls1021a-v1.0-dspi";
> > 
> > This doesn't need the "fsl,ls1021a-v1.0-dspi" compatible, can you please remove
> > it?
> 
> I have taken this example from LS1028a.dtsi and it uses these compatibles in conjugation.
> If "fsl,ls1021a-v1.0-dspi" is not required, then it should also be removed from device-tree
> As well as from bindings both.

Yes, the second compatible is never required by the driver and should be
removed from existing device trees if that makes "make dtbs_check" fail.