linux-kernel - Re: [PATCH net-next 1/3] dt-bindings: net: dsa: mt7530: replace label = "cpu" with proper checks

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Date:   Tue, 13 Sep 2022 16:26:48 +0000
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     Arınç ÜNAL <arinc.unal@...nc9.com>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        George McCollister <george.mccollister@...il.com>,
        Kurt Kanzenbach <kurt@...utronix.de>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Woojung Huh <woojung.huh@...rochip.com>,
        "UNGLinuxDriver@...rochip.com" <UNGLinuxDriver@...rochip.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Alvin Šipraga <alsi@...g-olufsen.dk>,
        Clément Léger <clement.leger@...tlin.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Marek Vasut <marex@...x.de>, John Crispin <john@...ozen.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "linux-renesas-soc@...r.kernel.org" 
        <linux-renesas-soc@...r.kernel.org>
Subject: Re: [PATCH net-next 1/3] dt-bindings: net: dsa: mt7530: replace label
 = "cpu" with proper checks

On Tue, Sep 13, 2022 at 06:55:05PM +0300, Arınç ÜNAL wrote:
> On 12.09.2022 20:50, Vladimir Oltean wrote:
> > The fact that some DSA device trees use 'label = "cpu"' for the CPU port
> > is nothing but blind cargo cult copying. The 'label' property was never
> > part of the DSA DT bindings for anything except the user ports, where it
> > provided a hint as to what name the created netdevs should use.
> > 
> > DSA does use the "cpu" port label to identify a CPU port in dsa_port_parse(),
> > but this is only for non-OF code paths (platform data).
> > 
> > The proper way to identify a CPU port is to look at whether the
> > 'ethernet' phandle is present.
> > 
> > Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
> 
> I realised "dt-bindings: net: dsa: mt7530:" prefix is used here instead of
> the usual "dt-bindings: net: dsa: mediatek,mt7530:". Does this matter?

Since "mt7530" implies "mediatek", I preferred to skip it.