netdev - Re: [PATCH v2 05/11] dt-bindings: net: sun4i-emac: Convert the binding to a schemas

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Message-ID: <CAL_JsqJahCJcdu=+fA=ewbGezuEJ2W6uwMVxkQpdY6w+1OWVVA@mail.gmail.com>
Date:   Mon, 10 Jun 2019 12:59:29 -0600
From:   Rob Herring <robh+dt@...nel.org>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Mark Rutland <mark.rutland@....com>,
        Frank Rowand <frowand.list@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Chen-Yu Tsai <wens@...e.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        netdev <netdev@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>, devicetree@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        Maxime Chevallier <maxime.chevallier@...tlin.com>,
        Antoine Ténart <antoine.tenart@...tlin.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>
Subject: Re: [PATCH v2 05/11] dt-bindings: net: sun4i-emac: Convert the
 binding to a schemas

On Mon, Jun 10, 2019 at 8:31 AM Andrew Lunn <andrew@...n.ch> wrote:
>
> > +required:
> > +  - compatible
> > +  - reg
> > +  - interrupts
> > +  - clocks
> > +  - phy
> > +  - allwinner,sram
>
> Quoting ethernet.txt:
>
> - phy: the same as "phy-handle" property, not recommended for new bindings.
>
> - phy-handle: phandle, specifies a reference to a node representing a PHY
>   device; this property is described in the Devicetree Specification and so
>   preferred;
>
> Can this be expressed in Yaml? Accept phy, but give a warning. Accept
> phy-handle without a warning? Enforce that one or the other is
> present?

The common schema could have 'phy: false'. This works as long as we've
updated (or plan to) all the dts files to use phy-handle. The issue is
how far back do you need kernels to work with newer dtbs.

Rob