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Message-ID: <20250407185129.654e7c9c@kmaincent-XPS-13-7390>
Date: Mon, 7 Apr 2025 18:51:29 +0200
From: Kory Maincent <kory.maincent@...tlin.com>
To: Sean Anderson <sean.anderson@...ux.dev>
Cc: netdev@...r.kernel.org, Andrew Lunn <andrew+netdev@...n.ch>, "David S .
Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub
Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Russell King
<linux@...linux.org.uk>, linux-kernel@...r.kernel.org, Christian Marangi
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Subject: Re: [RFC net-next PATCH 00/13] Add PCS core support
On Mon, 7 Apr 2025 12:33:28 -0400
Sean Anderson <sean.anderson@...ux.dev> wrote:
> On 4/7/25 12:27, Kory Maincent wrote:
> > On Thu, 3 Apr 2025 14:18:54 -0400
> > Sean Anderson <sean.anderson@...ux.dev> wrote:
> >
> >> This series adds support for creating PCSs as devices on a bus with a
> >> driver (patch 3). As initial users,
> >>
> >> - The Lynx PCS (and all of its users) is converted to this system (patch 5)
> >> - The Xilinx PCS is broken out from the AXI Ethernet driver (patches 6-8)
> >> - The Cadence MACB driver is converted to support external PCSs (namely
> >> the Xilinx PCS) (patches 9-10).
> >>
> >> The last few patches add device links for pcs-handle to improve boot times,
> >> and add compatibles for all Lynx PCSs.
> >>
> >> Care has been taken to ensure backwards-compatibility. The main source
> >> of this is that many PCS devices lack compatibles and get detected as
> >> PHYs. To address this, pcs_get_by_fwnode_compat allows drivers to edit
> >> the devicetree to add appropriate compatibles.
> >
> > I don't dive into your patch series and I don't know if you have heard
> > about it but Christian Marangi is currently working on fwnode for PCS:
> > https://lore.kernel.org/netdev/20250406221423.9723-1-ansuelsmth@gmail.com
> >
> > Maybe you should sync with him!
>
> I saw that series and made some comments. He is CC'd on this one.
Oh indeed, you have replied on his v1, sorry I missed it.
It seems he forgot to add you in CC in the v2.
> I think this approach has two advantages:
>
> - It completely solves the problem of the PCS being unregistered while the
> netdev (or whatever) is up
> - I have designed the interface to make it easy to convert existing
> drivers that may not be able to use the "standard" probing process
> (because they have to support other devicetree structures for
> backwards-compatibility).
Ok, thanks for the clarification!
I was working on the axienet driver to add support for the 10G version that's
why I discovered your series.
Regards,
--
Köry Maincent, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com
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