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

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Message-ID: <20170726162000.GJ12049@lunn.ch>
Date:   Wed, 26 Jul 2017 18:20:00 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Antoine Tenart <antoine.tenart@...e-electrons.com>
Cc:     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

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.

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.

      Andrew