linux-kernel - Re: [PATCH net-next RFC 0/5] net: phy: Introduce a port representation

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Message-ID: <Z31ABd8pdBjJtTiE@pengutronix.de>
Date: Tue, 7 Jan 2025 15:53:57 +0100
From: Oleksij Rempel <o.rempel@...gutronix.de>
To: Kory Maincent <kory.maincent@...tlin.com>
Cc: "Russell King (Oracle)" <linux@...linux.org.uk>,
	Maxime Chevallier <maxime.chevallier@...tlin.com>,
	davem@...emloft.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, thomas.petazzoni@...tlin.com,
	Andrew Lunn <andrew@...n.ch>, Jakub Kicinski <kuba@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
	linux-arm-kernel@...ts.infradead.org,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	Herve Codina <herve.codina@...tlin.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Vladimir Oltean <vladimir.oltean@....com>,
	Marek Behún <kabel@...nel.org>,
	Nicolò Veronese <nicveronese@...il.com>,
	Simon Horman <horms@...nel.org>, mwojtas@...omium.org,
	Antoine Tenart <atenart@...nel.org>
Subject: Re: [PATCH net-next RFC 0/5] net: phy: Introduce a port
 representation

On Tue, Jan 07, 2025 at 03:43:02PM +0100, Kory Maincent wrote:
> On Tue, 7 Jan 2025 15:02:46 +0100
> Oleksij Rempel <o.rempel@...gutronix.de> wrote:
> 
> > On Tue, Jan 07, 2025 at 02:26:05PM +0100, Kory Maincent wrote:
> > > On Thu, 2 Jan 2025 18:03:52 +0100
> > > Oleksij Rempel <o.rempel@...gutronix.de> wrote:
> > >   
> > > > On Thu, Jan 02, 2025 at 10:48:05AM +0000, Russell King (Oracle) wrote:  
> >  [...]  
> >  [...]  
> > > 
> > > Couldn't we begin with something simple like the following and add all the
> > > transformers and pairs information as you described later if the community
> > > feels we need it?
> > > 
> > > mdis {
> > > 
> > >     /* 1000BaseT Port with Ethernet and PoE */
> > >     mdi0: ethernet-mdi@0 {
> > >         reg = <0>; /* Port index */
> > >         label = "ETH0"; /* Physical label on the device */
> > >         connector = "RJ45"; /* Connector type */
> > >         supported-modes = <10BaseT 100BaseTX 1000BaseT>; /* Supported modes
> > > */ lanes = <2>;
> > >         variant = "MDI-X"; /* MDI or MDI-X */
> > >         pse = <&pse1>;
> > >     };
> > > };  
> > This was only the pair swap. How to reflect the polarity swap withing
> > the pairs?
> 
> Indeed I see what you mean. Maybe we could add it later as optional binding and
> only focus for now on the current needs.
> According to Maxime proposition he wants the connector types and the
> supported modes (or number of lanes). On my side I am interested in the PSE
> phandle.
> 
> We could begin with this:
> mdis {
>     /* 1000BaseT Port with Ethernet and PoE */
>     mdi0: ethernet-mdi@0 {
>         reg = <0>; /* Port index */
>         label = "ETH0"; /* Physical label on the device */
>         connector = "RJ45"; /* Connector type */
>         supported-modes = <10BaseT 100BaseTX 1000BaseT>; /* Supported modes */
>         pse = <&pse1>;
>     };
> };  
> 
> Your proposition will stay in our mind for future development on the subject.

Perfect :)

> I think we currently don't have enough time available to develop the full
> package.

Yes, no one do.

> What do you think?

Sounds good!

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