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

On Tue, Aug 04, 2026 at 09:10:30AM -0600, James Hilliard wrote:

On Tue, Aug 4, 2026 at 6:54 AM Andrew Lunn [off-list ref] wrote:

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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

So just the lines after the PHY, basically the UTP lines without the
twist.

So please stop wasting my time by making invalid points.

   Andrew