netdev - Re: [PATCH 2/5] dt-bindings: nvmem: add YAML schema for the ONIE tlv layout

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Date:   Fri, 28 Oct 2022 16:35:56 -0500
From:   Rob Herring <robh@...nel.org>
To:     Miquel Raynal <miquel.raynal@...tlin.com>
Cc:     Paolo Abeni <pabeni@...hat.com>,
        Robert Marko <robert.marko@...tura.hr>,
        Michael Walle <michael@...le.cc>, devicetree@...r.kernel.org,
        Jakub Kicinski <kuba@...nel.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        "David S. Miller" <davem@...emloft.net>,
        Russell King <linux@...linux.org.uk>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Maxime Chevallier <maxime.chevallier@...tlin.com>,
        linux-kernel@...r.kernel.org, Marcin Wojtas <mw@...ihalf.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        netdev@...r.kernel.org
Subject: Re: [PATCH 2/5] dt-bindings: nvmem: add YAML schema for the ONIE tlv
 layout

On Fri, Oct 28, 2022 at 03:44:31PM +0200, Miquel Raynal wrote:
> Hi Rob & Krzysztof,
> 
> robh@...nel.org wrote on Fri, 28 Oct 2022 07:20:05 -0500:
> 
> > On Fri, 28 Oct 2022 11:23:34 +0200, Miquel Raynal wrote:
> > > Add a schema for the ONIE tlv NVMEM layout that can be found on any ONIE
> > > compatible networking device.
> > > 
> > > Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
> > > ---
> > >  .../nvmem/layouts/onie,tlv-layout.yaml        | 96 +++++++++++++++++++
> > >  1 file changed, 96 insertions(+)
> > >  create mode 100644 Documentation/devicetree/bindings/nvmem/layouts/onie,tlv-layout.yaml
> > >   
> > 
> > My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
> > on your patch (DT_CHECKER_FLAGS is new in v5.13):
> > 
> > yamllint warnings/errors:
> > 
> > dtschema/dtc warnings/errors:
> > Documentation/devicetree/bindings/nvmem/layouts/onie,tlv-layout.example.dtb:0:0: /example-0/onie: failed to match any schema with compatible: ['onie,tlv-layout', 'vendor,device']
> 
> Oh right, I wanted to ask about this under the three --- but I forgot.
> Here was my question:
> 
> How do we make the checker happy with an example where the second
> compatible can be almost anything (any nvmem-compatible device) but the
> first one should be the layout? (this is currently what Michael's
> proposal uses).

That seems like mixing 2 different meanings for compatibles. Perhaps 
that should be split with the nvmem stuff going into a child container 
node.

Rob

P.S. Any compatible string starting with 'foo' will pass, but I probably 
won't be happy to see that used.