From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stefan Chulski <stefanc@marvell.com>
Subject: RE: [EXT] Re: [PATCH net-next 02/10] net: phy: phylink: allow 10GKR
 interface to use in-band negotiation
Date: Mon, 19 Mar 2018 13:19:24 +0000
Message-ID: <02614799e30f4823a97fca0e9f29b14b@IL-EXCH01.marvell.com>
References: <20180316103351.16616-1-antoine.tenart@bootlin.com>
 <20180316103351.16616-3-antoine.tenart@bootlin.com>
 <20180316155307.GQ9418@n2100.armlinux.org.uk> <20180319085252.GF4519@kwain>
 <20180319111205.GB2743@n2100.armlinux.org.uk> <20180319125227.GI4519@kwain>
 <20180319125953.GD19795@lunn.ch>
 <54e290a192734831b5db22191f056a81@IL-EXCH01.marvell.com>
 <20180319130823.GA22306@lunn.ch>
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Cc: "mw@semihalf.com" <mw@semihalf.com>, Yan Markman <ymarkman@marvell.com>,
 "jason@lakedaemon.net" <jason@lakedaemon.net>,
 Antoine Tenart <antoine.tenart@bootlin.com>,
 "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
 "gregory.clement@bootlin.com" <gregory.clement@bootlin.com>,
 Russell King - ARM Linux <linux@armlinux.org.uk>,
 "kishon@ti.com" <kishon@ti.com>, Nadav Haklai <nadavh@marvell.com>,
 "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>,
 "thomas.petazzoni@bootlin.com" <thomas.petazzoni@bootlin.com>,
 "miquel.raynal@bootlin.com" <miquel.raynal@bootlin.com>,
 "maxime.chevallier@bootlin.com" <maxime.chevallier@bootlin.com>,
 "davem@davemloft.net" <davem@davemloft.net>,
 "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
 "sebastian.hesselbarth@gmail.com" <sebastian.hesselbarth@gmail.com>
To: Andrew Lunn <andrew@lunn.ch>
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> -----Original Message-----
> From: Andrew Lunn [mailto:andrew@lunn.ch]
> Sent: Monday, March 19, 2018 3:08 PM
> To: Stefan Chulski <stefanc@marvell.com>
> Cc: Antoine Tenart <antoine.tenart@bootlin.com>; Russell King - ARM Linux
> <linux@armlinux.org.uk>; 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
> <nadavh@marvell.com>; Yan Markman <ymarkman@marvell.com>;
> 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
> 
> > > 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.