On Tue, Sep 04, 2018 at 04:55:26PM -0700, Florian Fainelli wrote:
> On 09/04/2018 04:32 PM, Andrew Lunn wrote:
> >
> >
> >> +void b53_serdes_phylink_validate(struct b53_device *dev, int port,
> >> + unsigned long *supported,
> >> + struct phylink_link_state *state)
> >> +{
> >> + u8 lane = b53_serdes_map_lane(dev, port);
> >> +
> >> + if (lane == B53_INVALID_LANE)
> >> + return;
> >> +
> >> + switch (lane) {
> >> + case 0:
> >> + phylink_set(supported, 2500baseX_Full);
> >
> > Hi Florian
> >
> > Could you also use it for 2500BaseT_Full with an appropriate copper
> > PHY?
>
> My reading of the datasheet (which only mentions 2.5G with no further
> mention) make me think that is not possible to do copper at 2.5G and
> only 2500baseX since it only talks about fiber and not copper.
>
> Would you recommend a specific SFP that allows that? Like this one:
>
> https://www.flexoptix.net/en/sfp-t-transceiver-2h-gigabit-cat-5e-rj-45-100m-100m-1000m-2500-base-t.html?co8829=85744
I was actually thinking of a 'plain old' copper PHY with a SERDES
interface which can do 25000Base-T. The Marvell 88x3310 or the
Aquantia 10G PHY, for example.
Russell might be able to make a recommendation. I don't have any
Copper SFP modules.
Andrew
