RE: [EXT] Re: [PATCH net-next 10/18] net: mvpp2: use the GoP interrupt for link status changes

Stefan Chulski
2017-08-23T15:24:55Z

> When the cable is connected (there is signal) and the serdes is in sync and AN
> succeeded.
>
> > With SFF/SFP ports, you generally need a gpio line the fibre module
> > can use to indicate if it has link. Fixed-phy has such support, and
> > your link_change function will get called when the link changes.
>
> So that would work when using SFP modules but I wonder if the GoP irq isn't
> needed when using passive cable, in which case this patch would still be needed
> (and of course we should support the new Russell phylib capabilities).
>
> What's your thoughts on this?
>
> Thanks!
> Antoine
>

Even if new phylib driver supports passive direct cables connection,
GoP IRQ required for SOHO/Peridot external switch support.
SOHO/Peridot external switch could be connected directly to Serdes line.

Regards,
Stefan