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

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Message-ID: <ed5990bd-e671-4f96-bec8-543de3b48712@linux.dev>
Date: Mon, 7 Apr 2025 13:40:45 -0400
From: Sean Anderson <sean.anderson@...ux.dev>
To: Daniel Golle <daniel@...rotopia.org>,
 "Christian Marangi (Ansuel)" <ansuelsmth@...il.com>
Cc: 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 4/7/25 13:25, Daniel Golle wrote:
> 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=*

OK, but I still think this is quite easy to add.

--Sean