From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3631127EE0; Mon, 16 Oct 2023 23:50:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="lY5wrcHz" Received: from mail-oa1-x34.google.com (mail-oa1-x34.google.com [IPv6:2001:4860:4864:20::34]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EE1B392; Mon, 16 Oct 2023 16:50:05 -0700 (PDT) Received: by mail-oa1-x34.google.com with SMTP id 586e51a60fabf-1e9c28f8193so742020fac.1; Mon, 16 Oct 2023 16:50:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1697500205; x=1698105005; darn=vger.kernel.org; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date:from:to :cc:subject:date:message-id:reply-to; bh=afy0MXtsD2D0MnkMCMjfUzfom4xI2vJk8/IezA0lkPA=; b=lY5wrcHzULZ75Wp8T3L/Qloqq0P9/zq7XFUEJCUgdwfGL0b5dxc/M+VftDmLbJ98rY nHmHmCPjr/4HopW6Xco/xLywuJVY58X3XXrcf0oZYYhoC4yvIbBWQXh8i+zxDhSzY4fo drE7z03FrzDs/bAcYCYNLu7l5Ju0FSjbLoWZD9oXdPDGaF6XjxOBxodyKX19xgoqzWxC mf4XfBIjxtfHBuqVBOR/7EfMhCwZEALZD+oIbGj2tTAcJwf2z3pBonnJ9hGUTVBIzg9Q tRU4qfEAbBdEaR6l1bP8Sv1Hwa7qEucYgI97XN5niA1hI8ihfmlfjN76P6ncU01k7Pvm YTvA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1697500205; x=1698105005; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=afy0MXtsD2D0MnkMCMjfUzfom4xI2vJk8/IezA0lkPA=; b=k2VLqiSt9Z+wUDbe3pXeo3zx44JhSzpHbA2FlwtGxvU6rKKm+Oy3D8kzFs/HXJEqFs IK2FRX6vPWAyzVU3RnvE/PdWytrDSBBjXXS1Gz8Ts9t3MM1GvCanU2DbtEaiHN3LLKL4 Lph+JI2fNU/HKudjN/3QZNqDcjxO7G5MkylG/mzRlOLxYnK2Tgvu+YZnK9gNBm9LyCG1 3SbwJHhimEQI+1JLOgbmtorspgnmquBWlx8hvuq3dPShJRwjUMeOnb9ZCF8NC6L6lgaa GjKw4a3sGRrz/i+uErxkVF5HHxjS/O3nJvdhzwlfNs2pIh3MPstEpOVebmaRgBeRZGly akqg== X-Gm-Message-State: AOJu0Ywb/DrpZsFyG8uPsKR7QVA6ZnscFgMzyvGTwfiKFCUPqzgO+L3T GZsp5fVGqH8yap2aLJfAP8s= X-Google-Smtp-Source: AGHT+IF9NDk7vMXYl4HgcoULTLbuUz2pmcjxzd86mfYEhJqbGcJzQ6XJsen27bFhDcH/ydszMmCDCA== X-Received: by 2002:a05:6870:4d1c:b0:1e9:bbfe:6458 with SMTP id pn28-20020a0568704d1c00b001e9bbfe6458mr721692oab.1.1697500205156; Mon, 16 Oct 2023 16:50:05 -0700 (PDT) Received: from hoboy.vegasvil.org ([2601:640:8000:54:e2d5:5eff:fea5:802f]) by smtp.gmail.com with ESMTPSA id s15-20020a63af4f000000b005b628aa2a8dsm174591pgo.69.2023.10.16.16.50.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Oct 2023 16:50:04 -0700 (PDT) Date: Mon, 16 Oct 2023 16:50:01 -0700 From: Richard Cochran To: =?iso-8859-1?Q?K=F6ry?= Maincent 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: 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> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20231016124134.6b271f07@kmaincent-XPS-13-7390> X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net 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. Thanks, Richard