Re: [PATCH 1/5] dt-bindings: net: qca,ar803x: Add IPQ5018 Internal GE PHY support

[Andrew Lunn <andrew@lunn.ch>]

> > > > > > Would qcom,phy-to-phy-dac (boolean) do?
> > > > > 
> > > > > Seems fine to me.
> > > > 
> > > > Can the driver instead check for a phy reference?
> > > 
> > > Do you mean using the existing phy-handle DT property or create a new DT property called 'qcom,phy-reference'? Either way, can add it for v2.
> > 
> > I'm not sure how this is all wired up. Do you have an example of a DT
> > with both configurations you described in your reply to Andrew?

When a SoC interface is connected to a switch, the SoC interface has
no real knowledge it is actually connected to a switch. All it knows
is it has a link peer, and it does not know if that peer is 1cm away
or 100m. It does nothing different.

The switch has a phandle to the SoC interface, so it knows a bit more,
but it would be a bit around about for the SoC interface to search the
whole device tree to see if there is a switch with a phandle pointing
to it. So for me, a bool property indicating a short 'cable' is the
better solution.

	Andrew