Messages in this thread | | | Date | Mon, 14 Aug 2023 15:09:25 +0200 | From | Andrew Lunn <> | Subject | Re: [PATCH 2/4] dt-bindings: net: dsa: document internal MDIO bus |
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> Ah okay. I didn't consider the switch architecture where the data interface > of the PHY is connected to the switch, and the PHY management interface is > connected to the mdio bus that the switch is connected to.
The generic Linux architecture for PHYs and binding them to a MAC via a phandle allows the PHY to be on any MDIO bus anywhere. DSA has some additional shortcuts to support 1:1 mapping if the switch has its own MDIO bus, without describing it in DT, but this is just in addition to the generic code.
> Not json-schema documentation, don't care about: > - ar9331.txt > - lan9303.txt > - lantiq-gswip.txt > - marvell.txt
The marvell switch can have up to 2 MDIO busses. If i remember correctly, there is also one switch which has one MDIO bus per port.
Andrew
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