linux-kernel - Re: [PATCH 2/4] dt-bindings: net: dsa: document internal MDIO bus

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Message-ID: <20230911225126.rk23g3u3bzo3agby@skbuf>
Date:   Tue, 12 Sep 2023 01:51:26 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     Arınç ÜNAL <arinc.unal@...nc9.com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...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>,
        Conor Dooley <conor+dt@...nel.org>,
        Woojung Huh <woojung.huh@...rochip.com>,
        UNGLinuxDriver@...rochip.com,
        Linus Walleij <linus.walleij@...aro.org>,
        Alvin Šipraga <alsi@...g-olufsen.dk>,
        Daniel Golle <daniel@...rotopia.org>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>, mithat.guner@...ont.com,
        erkin.bozoglu@...ont.com, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH 2/4] dt-bindings: net: dsa: document internal MDIO bus

On Sat, Sep 09, 2023 at 11:53:50AM +0300, Arınç ÜNAL wrote:
> What to do:
> - For mscc,vsc7514-switch, enforce phylink bindings for ports.
> - For mscc,vsc7512-switch, enforce phylink bindings for user ports.

you can also look at dsa_switches_apply_workarounds[], and if the switch
isn't there, then you can replace "user ports" with "ports" here and
everywhere.

> - renesas,rzn1-a5psw.yaml
>   - renesas,r9a06g032-a5psw, renesas,rzn1-a5psw
> 
> What to do:
> - Document "mdio".

Not clear here and for all the schemas quoted below.. is "mdio" not documented already?

> - realtek.yaml
>   - realtek,rtl8365mb
>   - realtek,rtl8366rb
> 
> drivers/net/dsa/realtek/realtek-mdio.c:
> - The DSA subdriver lets the DSA driver register the bus.
> 
> What to do:
> - Document "mdio".
>   - Require "mdio". (Can't do because it's not required for MDIO controlled
>     switches that share the compatible string with SMI controlled switches.
>     This is why I would like Luiz to unify the bus registeration process.)
> - Document compatible string "realtek,smi-mdio" on "mdio" child node.
>   - Require compatible. (Can't do because the same as above.)
> - Enforce phylink bindings for user ports. (Can't do because the same as
>   above.)
>   - Enforce phylink bindings for user ports if "mdio" is defined.
> 
> ---
> 
> - qca8k.yaml
>   - qca,qca8327
>   - qca,qca8328
>   - qca,qca8334
>   - qca,qca8337
> 
> drivers/net/dsa/qca/qca8k-8xxx.c:
> - The DSA subdriver won't let the DSA driver register the bus.
>   - No ds->ops->phy_read() or ds->ops->phy_write().
> - Registers the bus non-OF-based or OF-based. Registers OF-based if "mdio"
>   child node is defined.
>   - mdio = of_get_child_by_name(priv->dev->of_node, "mdio");
> 
> What to do:
> - Document "mdio".
> - Enforce phylink bindings for user ports if "mdio" is defined.
> 
> ---
> 
> - nxp,sja1105.yaml
>   - nxp,sja1105e
>   - nxp,sja1105t
>   - nxp,sja1105p
>   - nxp,sja1105q
>   - nxp,sja1105r
>   - nxp,sja1105s
>   - nxp,sja1110a
>   - nxp,sja1110b
>   - nxp,sja1110c
>   - nxp,sja1110d
> 
> What to do:
> - Document "mdios".
>   - Document child node pattern property under "mdios".
>     - Document "nxp,sja1110-base-tx-mdio" and "nxp,sja1110-base-t1-mdio"
>       compatible strings.
> ---
> 
> - microchip,lan937x.yaml
>   - microchip,lan9370
>   - microchip,lan9371
>   - microchip,lan9372
>   - microchip,lan9373
>   - microchip,lan9374
> - microchip,ksz.yaml
>   - microchip,ksz8765
>   - microchip,ksz8794
>   - microchip,ksz8795
>   - microchip,ksz8863
>   - microchip,ksz8873
>   - microchip,ksz9477
>   - microchip,ksz9897
>   - microchip,ksz9896
>   - microchip,ksz9567
>   - microchip,ksz8565
>   - microchip,ksz9893
>   - microchip,ksz9563
>   - microchip,ksz8563
> 
> What to do:
> - Document "mdio".