From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B4E1FCDB483 for ; Tue, 17 Oct 2023 08:29:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234740AbjJQI3n (ORCPT ); Tue, 17 Oct 2023 04:29:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41538 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234627AbjJQI3l (ORCPT ); Tue, 17 Oct 2023 04:29:41 -0400 Received: from relay6-d.mail.gandi.net (relay6-d.mail.gandi.net [217.70.183.198]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1E5DBFC; Tue, 17 Oct 2023 01:29:38 -0700 (PDT) Received: by mail.gandi.net (Postfix) with ESMTPSA id DF350C000B; Tue, 17 Oct 2023 08:29:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1697531377; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=dmxQpIzLlbHBHrdjma2mjJV6ut4SgvXoBNrtVZhL5uI=; b=PsBfDznE7RSnRaJOw9XIKjq3YkUFypmBDmoCj642kLRhUasKALIlXZeXRmKN1mGp2RuU4n sc+RRpz61XhIDXG9nFIhrq0Pm7Nq763J9O+Bbmhq3gXTPyjkgrYby74TsoCURTxJi/d4W/ auCbKUpZINclHYRcWrATica58YFiQsanftfnTF40zZqISQN4zVBP1KAvlca1hdNfpjsBR+ JZzx+sQx0eTg8omH2bQFiUSg0p5nfUEqiBJxY529pes55aj3gv6F242Su+gKzqbAqlOynB +w6w4ppPeUks1N6rBiH2zOhUNFQCFDPOiCpL9dyMA+23hjnhxRCF/8z5gd6j0g== Date: Tue, 17 Oct 2023 10:29:20 +0200 From: =?UTF-8?B?S8O2cnk=?= Maincent To: Richard Cochran Cc: Andrew Lunn , Jakub Kicinski , Florian Fainelli , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, Thomas Petazzoni , "David S . Miller" , Eric Dumazet , Paolo Abeni , Jonathan Corbet , Jay Vosburgh , Andy Gospodarek , Nicolas Ferre , Claudiu Beznea , Horatiu Vultur , UNGLinuxDriver@microchip.com, Broadcom internal kernel review list , Heiner Kallweit , Russell King , Radu Pirea , Willem de Bruijn , Vladimir Oltean , Michael Walle , Jacob Keller , Maxime Chevallier Subject: Re: [PATCH net-next v5 08/16] net: ethtool: Add a command to expose current time stamping layer Message-ID: <20231017102920.584d759f@kmaincent-XPS-13-7390> In-Reply-To: References: <20231009155138.86458-1-kory.maincent@bootlin.com> <20231009155138.86458-9-kory.maincent@bootlin.com> <2fbde275-e60b-473d-8488-8f0aa637c294@broadcom.com> <20231010102343.3529e4a7@kmaincent-XPS-13-7390> <20231013090020.34e9f125@kernel.org> <6ef6418d-6e63-49bd-bcc1-cdc6eb0da2d5@lunn.ch> <20231016124134.6b271f07@kmaincent-XPS-13-7390> Organization: bootlin X-Mailer: Claws Mail 3.17.5 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-GND-Sasl: kory.maincent@bootlin.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 16 Oct 2023 16:50:01 -0700 Richard Cochran wrote: > On Mon, Oct 16, 2023 at 12:41:34PM +0200, K=C3=B6ry Maincent wrote: >=20 > > Still I am wondering why hardware timestamping capabilities can be enab= led > > without phc. =20 >=20 > There is hardware that simply provides time values on frames from a > free running clock, and that clock cannot be read, set, or adjusted. >=20 > 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. K=C3=B6ry