linux-kernel - Re: [RFC net-next PATCH 00/13] Add PCS core support

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Message-ID: <Z_QKl-4563l05WB3@makrotopia.org>
Date: Mon, 7 Apr 2025 18:25:43 +0100
From: Daniel Golle <daniel@...rotopia.org>
To: "Christian Marangi (Ansuel)" <ansuelsmth@...il.com>
Cc: Sean Anderson <sean.anderson@...ux.dev>,
	Kory Maincent <kory.maincent@...tlin.com>, netdev@...r.kernel.org,
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Subject: Re: [RFC net-next PATCH 00/13] Add PCS core support

On Mon, Apr 07, 2025 at 07:21:38PM +0200, Christian Marangi (Ansuel) wrote:
> Il giorno lun 7 apr 2025 alle ore 19:00 Sean Anderson
> > I agree that a "cells" approach would require this, but
> >
> > - There are no in-tree examples of where this is necessary
> > - I think this would be easy to add when necessary
> >
> 
> There are no in-tree cause only now we are starting to support
> complex configuration with multiple PCS placed outside the MAC.
> 
> I feel it's better to define a standard API for them now before
> we permit even more MAC driver to implement custom property
> and have to address tons of workaround for compatibility.

Qualcomm's PCS driver will require offering multiple phylink_pcs by a
single device/of_node. So while it's true that there is currently no
in-tree user for that, that very user is already knocking on our doors.

See
https://patchwork.kernel.org/project/netdevbpf/list/?series=931658&state=*