linux-kernel - Re: [RFC net-next PATCH 01/16] dt-bindings: net: Add pcs property

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Date:   Tue, 12 Oct 2021 08:16:42 -0500
From:   Rob Herring <robh@...nel.org>
To:     "Russell King (Oracle)" <linux@...linux.org.uk>,
        Sean Anderson <sean.anderson@...o.com>
Cc:     netdev@...r.kernel.org, "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, linux-kernel@...r.kernel.org,
        Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        devicetree@...r.kernel.org
Subject: Re: [RFC net-next PATCH 01/16] dt-bindings: net: Add pcs property

On Tue, Oct 05, 2021 at 10:39:36AM +0100, Russell King (Oracle) wrote:
> On Mon, Oct 04, 2021 at 03:15:12PM -0400, Sean Anderson wrote:
> > Add a property for associating PCS devices with ethernet controllers.
> > Because PCS has no generic analogue like PHY, I have left off the
> > -handle suffix.
> 
> For PHYs, we used to have phy and phy-device as property names, but the
> modern name is "phy-handle". I think we should do the same here, so I
> would suggest using "pcs-handle".

On 1G and up ethernet, we have 2 PHYs. There's the external (typically) 
ethernet PHY which is what the above properties are for. Then there's 
the on-chip serdes PHY similar to SATA, PCIe, etc. which includes the 
PCS part. For this part, we should use the generic PHY binding. I think 
we already have bindings doing that.

Rob