Hi Andrew,
On Mon, 17 Feb 2020 at 17:29, Andrew Lunn <andrew@xxxxxxx> wrote:
>
> Hi Vladimir
>
> > + /* Internal port with DSA tagging */
> > + mscc_felix_port4: port@4 {
> > + reg = <4>;
> > + phy-mode = "gmii";
>
> Is it really using gmii? Often in SoC connections use something else,
> and phy-mode = "internal" is more appropriate.
>
What would be that "something else"? Given that the host port and the
switch are completely different hardware IP blocks, I would assume
that a parallel GMII is what's connecting them, no optimizations done.
Certainly no serializer. But I don't know for sure.
Does it matter, in the end?
> > + ethernet = <&enetc_port2>;
> > +
> > + fixed-link {
> > + speed = <2500>;
> > + full-duplex;
> > + };
>
> gmii and 2500 also don't really go together.
Not even if you raise the clock frequency?
>
> Andrew
Thanks,
-Vladimir
