linux-kernel - Re: [PATCH v2] ARM: dts: dove.dtsi: Move ethphy to fix schema error

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Date:   Thu, 29 Dec 2022 15:14:47 +0100
From:   Michał Grzelak <mig@...ihalf.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     linux-kernel@...r.kernel.org, sebastian.hesselbarth@...il.com,
        gregory.clement@...tlin.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        mw@...ihalf.com, upstream@...ihalf.com, mchl.grzlk@...il.com
Subject: Re: [PATCH v2] ARM: dts: dove.dtsi: Move ethphy to fix schema error

Hi Andrew,

Thanks for quick reply.

On Thu, Dec 29, 2022 at 2:32 AM Andrew Lunn <andrew@...n.ch> wrote:
>
> On Wed, Dec 28, 2022 at 09:02:34PM +0100, Michał Grzelak wrote:
> > Running 'make dtbs_check' with schema in net/marvell,orion-mdio.yaml
> > gives the following warnings:
> > mdio-bus@...04: Unevaluated properties are not allowed
> > ('ethernet-phy' was unexpected)
> >       arch/arm/boot/dts/dove-cubox.dtb
> >       arch/arm/boot/dts/dove-cubox-es.dtb
> >       arch/arm/boot/dts/dove-d2plug.dtb
> >       arch/arm/boot/dts/dove-d2plug.dtb
> >       arch/arm/boot/dts/dove-dove-db.dtb
> >       arch/arm/boot/dts/dove-d3plug.dtb
> >       arch/arm/boot/dts/dove-sbc-a510.dtb
> > Fix them by removing empty ethphy subnode from dove.dtsi and describe
> > PHY on the relevant board .dts files level.
>
> I don't think your description is correct. What i think is causing the
> problem is that the ethphy subnode in dove.dtsi does not have an @X.
>

Yes, it is exactly the case. The problem is after adding dummy address
e.g. ethernet-phy@0 in dove.dtsi 'make dtbs_check' shows warnings
about missing required 'reg' property, that's why ethernet-phy is
moved to .dts files.

> By moving it into the .dts file, you can then give it the correct @1,
> or @3, which makes the linter happy. The kernel itself does not care
> about this, it is an example of the linter being much more strict than
> the kernel.
>
> If you agree with me, please update the description.

This patch exactly fixes this issue by setting proper
ethernet-phy@<reg value> in board files.
In such a case would you like me to update the commit message to
better describe the change or do you have other remarks to the diff?

Best regards,
Michał