From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752014AbcFWN2P (ORCPT ); Thu, 23 Jun 2016 09:28:15 -0400 Received: from mail-wm0-f66.google.com ([74.125.82.66]:32793 "EHLO mail-wm0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751747AbcFWN2K (ORCPT ); Thu, 23 Jun 2016 09:28:10 -0400 Date: Thu, 23 Jun 2016 15:28:05 +0200 From: Richard Cochran To: Henrik Austad Cc: Pierre-Louis Bossart , alsa-devel@alsa-project.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Arnd Bergmann , linux-media@vger.kernel.org Subject: Re: [alsa-devel] [very-RFC 0/8] TSN driver for the kernel Message-ID: <20160623132805.GC7122@localhost.localdomain> References: <20160613195136.GC2441@netboy> <20160614121844.54a125a5@lxorguk.ukuu.org.uk> <5760C84C.40408@sakamocchi.jp> <20160615080602.GA13555@localhost.localdomain> <5764DA85.3050801@sakamocchi.jp> <20160618224549.GF32724@icarus.home.austad.us> <9a5abd48-4da3-945d-53c9-b6d37010ab0d@linux.intel.com> <20160620121838.GA5257@localhost.localdomain> <07283da9-f6d1-c3b1-7989-a6fce7ca0ee6@linux.intel.com> <20160623103848.GG32724@icarus.home.austad.us> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160623103848.GG32724@icarus.home.austad.us> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jun 23, 2016 at 12:38:48PM +0200, Henrik Austad wrote: > Richard: is it fair to assume that if ptp4l is running and is part of a PTP > domain, ktime_get() will return PTP-adjusted time for the system? No. > Or do I also need to run phc2sys in order to sync the system-time > to PTP-time? Yes, unless you are using SW time stamping, in which case ptp4l will steer the system clock directly. HTH, Richard