RE: [EXT] Re: [PATCH net-next 02/10] net: phy: phylink: allow 10GKR interface to use in-band negotiation

-----Original Message-----
From: Andrew Lunn [mailto:andrew@lunn.ch]
Sent: Monday, March 19, 2018 3:08 PM
To: Stefan Chulski <redacted>
Cc: Antoine Tenart <redacted>; Russell King - ARM Linux
[off-list ref]; davem@davemloft.net; kishon@ti.com;
gregory.clement@bootlin.com; jason@lakedaemon.net;
sebastian.hesselbarth@gmail.com; netdev@vger.kernel.org; linux-
kernel@vger.kernel.org; thomas.petazzoni@bootlin.com;
maxime.chevallier@bootlin.com; miquel.raynal@bootlin.com; Nadav Haklai
[off-list ref]; Yan Markman [off-list ref];
mw@semihalf.com; linux-arm-kernel@lists.infradead.org
Subject: Re: [EXT] Re: [PATCH net-next 02/10] net: phy: phylink: allow 10GKR
interface to use in-band negotiation

quoted

quoted

If they don't have PHYs, how are the connected to the outside world?

   Andrew

By external SFP or direct attached cable.

Maybe i'm missing something, but don't you just need to add an SFP device
in the device tree. The SFP code and PHYLINK will work together, query what
the SFP module is, use the GPIOs to determine link up/down and module
present, and tell the MAC how to configure the MAC-SFP link?

     Andrew

phylink pool SFP loss signal to determine link up/down?

Stefan,
Best Regards.