Re: [PATCH net-next v2 0/3] net: mdio: support dynamic OF device changes

James Hilliard <[email protected]> Tue, 4 Aug 2026 09:10:30 -0600

Newsgroups	gmane.linux.drivers.devicetree,gmane.linux.network,gmane.linux.kernel
Message-ID	<CADvTj4rA5QaeccDvSP2qrseFKv+7MKhj=pRWdSnNzKKjMCdK6g@mail.gmail.com>

On Tue, Aug 4, 2026 at 6:54 AM Andrew Lunn <[email protected]> wrote:
>
> > > If this was a hat on top of a SBC, with an EEPROM indicating what the
> > > hat was, then maybe DT overlays would make sense. But from what you
> > > have said, this is a fixed PCB design, nothing hot/cold plugable.
> >
> > Some H616/H618 boards have the ethernet port on an expansion board:
> > http://www.orangepi.org/html/hardWare/computerAndMicrocontrollers/details/2W-expansion-board.html
>
> I don't see a list of pins which go across the connector. Does the
> MDIO bus go to the expansion board? Is the PHY on the expansion
> board. It all looks passive to me.

Pins are listed under "24Pin expansion board interface pin description":
https://orangepi.net/wp-content/uploads/2023/10/OrangePi_Zero2w_H618_User-Manual_v1.1.pdf

I think it's just the connector part that's on the expansion board?

>
>         Andrew