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Message-ID: <20171227224252.GB2626@kwain>
Date:   Wed, 27 Dec 2017 23:42:52 +0100
From:   Antoine Tenart <antoine.tenart@...e-electrons.com>
To:     Russell King - ARM Linux <linux@...linux.org.uk>
Cc:     Antoine Tenart <antoine.tenart@...e-electrons.com>,
        davem@...emloft.net, kishon@...com, andrew@...n.ch,
        jason@...edaemon.net, sebastian.hesselbarth@...il.com,
        gregory.clement@...e-electrons.com, mw@...ihalf.com,
        stefanc@...vell.com, ymarkman@...vell.com,
        thomas.petazzoni@...e-electrons.com,
        miquel.raynal@...e-electrons.com, nadavh@...vell.com,
        netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 5/6] arm64: dts: marvell: mcbin: enable the
 fourth network interface

Hi Russell,

On Wed, Dec 27, 2017 at 10:24:01PM +0000, Russell King - ARM Linux wrote:
> On Wed, Dec 27, 2017 at 11:14:45PM +0100, Antoine Tenart wrote:
> >  
> > +&cps_eth2 {
> > +	/* CPS Lane 5 */
> > +	status = "okay";
> > +	phy-mode = "2500base-x";
> > +	/* Generic PHY, providing serdes lanes */
> > +	phys = <&cps_comphy5 2>;
> > +};
> > +
> 
> This is wrong.  This lane is connected to a SFP cage which can support
> more than just 2500base-X.  Tying it in this way to 2500base-X means
> that this port does not support conenctions at 1000base-X, despite
> that's one of the most popular and more standardised speeds.

What do you suggest to describe this in the dt, to enable a port using
the current PPv2 driver?

Antoine

-- 
Antoine Ténart, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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