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Message-ID: <20240305083938.6977335f@kernel.org>
Date: Tue, 5 Mar 2024 08:39:38 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Köry Maincent <kory.maincent@...tlin.com>
Cc: "Russell King (Oracle)" <linux@...linux.org.uk>, Florian Fainelli
 <florian.fainelli@...adcom.com>, Broadcom internal kernel review list
 <bcm-kernel-feedback-list@...adcom.com>, Andrew Lunn <andrew@...n.ch>,
 Heiner Kallweit <hkallweit1@...il.com>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Paolo Abeni
 <pabeni@...hat.com>, Richard Cochran <richardcochran@...il.com>, Radu Pirea
 <radu-nicolae.pirea@....nxp.com>, Jay Vosburgh <j.vosburgh@...il.com>, Andy
 Gospodarek <andy@...yhouse.net>, Nicolas Ferre
 <nicolas.ferre@...rochip.com>, Claudiu Beznea <claudiu.beznea@...on.dev>,
 Willem de Bruijn <willemdebruijn.kernel@...il.com>, Jonathan Corbet
 <corbet@....net>, Horatiu Vultur <horatiu.vultur@...rochip.com>,
 UNGLinuxDriver@...rochip.com, Simon Horman <horms@...nel.org>, Vladimir
 Oltean <vladimir.oltean@....com>, Thomas Petazzoni
 <thomas.petazzoni@...tlin.com>, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org, Maxime Chevallier
 <maxime.chevallier@...tlin.com>, Rahul Rameshbabu <rrameshbabu@...dia.com>
Subject: Re: [PATCH net-next v9 08/13] ptp: Add phc source and helpers to
 register specific PTP clock or get information

On Tue, 5 Mar 2024 16:35:46 +0100 Köry Maincent wrote:
> > Still, wouldn't it be simpler to store all accessible PTP instances 
> > in the netdev?  
> 
> You are talking about something like the phy topology but for the ptp?
> 
> Then when asking information on a PHC (tsinfo or hwtstamp config) from ethtool
> we would have to look at the PHC topology of the netdev. This could work. Not
> sure it is much simpler, do you see other advantages that it could have?

I was thinking just an array indexed by enum hwtstamp_source.
But you're right, once we can express more than one phy per
netdev we're basically back to doing similar walks. Fair.

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