netdev - 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 10:51:16 -0500
From:   Rob Herring <robh@...nel.org>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     Sean Wang <sean.wang@...iatek.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Kurt Kanzenbach <kurt@...utronix.de>,
        DENG Qingfang <dqfext@...il.com>,
        Arınç ÜNAL <arinc.unal@...nc9.com>,
        linux-kernel@...r.kernel.org,
        George McCollister <george.mccollister@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-renesas-soc@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Andrew Lunn <andrew@...n.ch>,
        Woojung Huh <woojung.huh@...rochip.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>, UNGLinuxDriver@...rochip.com,
        Clément Léger <clement.leger@...tlin.com>,
        devicetree@...r.kernel.org,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-mediatek@...ts.infradead.org,
        Matthias Brugger <matthias.bgg@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Landen Chao <Landen.Chao@...iatek.com>,
        Vladimir Oltean <olteanv@...il.com>,
        John Crispin <john@...ozen.org>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Marek Vasut <marex@...x.de>,
        Alvin Šipraga <alsi@...g-olufsen.dk>,
        netdev@...r.kernel.org
Subject: Re: [PATCH net-next 1/3] dt-bindings: net: dsa: mt7530: replace
 label = "cpu" with proper checks

On Mon, 12 Sep 2022 20:50:56 +0300, 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>
> ---
>  .../devicetree/bindings/net/dsa/mediatek,mt7530.yaml | 12 +++---------
>  1 file changed, 3 insertions(+), 9 deletions(-)
> 

Acked-by: Rob Herring <robh@...nel.org>