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Message-ID: <20231017102920.584d759f@kmaincent-XPS-13-7390> Date: Tue, 17 Oct 2023 10:29:20 +0200 From: Köry Maincent <kory.maincent@...tlin.com> To: Richard Cochran <richardcochran@...il.com> Cc: Andrew Lunn <andrew@...n.ch>, Jakub Kicinski <kuba@...nel.org>, Florian Fainelli <florian.fainelli@...adcom.com>, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org, Thomas Petazzoni <thomas.petazzoni@...tlin.com>, "David S . Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Jonathan Corbet <corbet@....net>, Jay Vosburgh <j.vosburgh@...il.com>, Andy Gospodarek <andy@...yhouse.net>, Nicolas Ferre <nicolas.ferre@...rochip.com>, Claudiu Beznea <claudiu.beznea@...on.dev>, Horatiu Vultur <horatiu.vultur@...rochip.com>, UNGLinuxDriver@...rochip.com, Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>, Heiner Kallweit <hkallweit1@...il.com>, Russell King <linux@...linux.org.uk>, Radu Pirea <radu-nicolae.pirea@....nxp.com>, Willem de Bruijn <willemdebruijn.kernel@...il.com>, Vladimir Oltean <vladimir.oltean@....com>, Michael Walle <michael@...le.cc>, Jacob Keller <jacob.e.keller@...el.com>, Maxime Chevallier <maxime.chevallier@...tlin.com> Subject: Re: [PATCH net-next v5 08/16] net: ethtool: Add a command to expose current time stamping layer On Mon, 16 Oct 2023 16:50:01 -0700 Richard Cochran <richardcochran@...il.com> wrote: > On Mon, Oct 16, 2023 at 12:41:34PM +0200, Köry Maincent wrote: > > > Still I am wondering why hardware timestamping capabilities can be enabled > > without phc. > > There is hardware that simply provides time values on frames from a > free running clock, and that clock cannot be read, set, or adjusted. > > So the time stamps only relate to other time stamps from the same > device. That might be used for performance analysis. Ok, thanks you for the information. Köry
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