netdev - Re: [PATCH net-next 08/18] net: mvpp2: make the phy optional

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Message-ID: <20170728015033.GD24728@kwain>
Date:   Thu, 27 Jul 2017 18:50:33 -0700
From:   Antoine Tenart <antoine.tenart@...e-electrons.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Antoine Tenart <antoine.tenart@...e-electrons.com>,
        davem@...emloft.net, jason@...edaemon.net,
        gregory.clement@...e-electrons.com,
        sebastian.hesselbarth@...il.com,
        thomas.petazzoni@...e-electrons.com, nadavh@...vell.com,
        linux@...linux.org.uk, mw@...ihalf.com, stefanc@...vell.com,
        netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH net-next 08/18] net: mvpp2: make the phy optional

Hi Andrew,

On Wed, Jul 26, 2017 at 06:20:00PM +0200, Andrew Lunn wrote:
> On Mon, Jul 24, 2017 at 03:48:38PM +0200, Antoine Tenart wrote:
> > SFP ports do not necessarily need to have an Ethernet PHY between the
> > SoC and the actual physical port. However, the driver currently makes
> > the "phy" property mandatory, contrary to what is stated in the Device
> > Tree binding.
> > 
> > To allow handling the PPv2 controller on those boards, this patch makes
> > the PHY optional, and aligns the PPv2 driver on its device tree
> > documentation.
> 
> It is an architectural question...
> 
> but with the boards i have with an SFF port, i actually use a
> fixed-phy to represent the SFF. Then nothing special is needed.

I was not aware of the fixed-phy, that might work for us here.
Thanks for the hint!

> Also, Russell King posted his phylink patches. Once accepted, you are
> going to want to re-write some of this to make use of that code.

And there's that as well.

Thanks!
Antoine

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

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