Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754706AbbHJIxS (ORCPT ); Mon, 10 Aug 2015 04:53:18 -0400 Received: from mail-wi0-f170.google.com ([209.85.212.170]:33432 "EHLO mail-wi0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754673AbbHJIxP (ORCPT ); Mon, 10 Aug 2015 04:53:15 -0400 Date: Mon, 10 Aug 2015 10:53:10 +0200 From: Richard Cochran To: Christopher Hall Cc: john.stultz@linaro.org, tglx@linutronix.de, mingo@redhat.com, jeffrey.t.kirsher@intel.com, john.ronciak@intel.com, hpa@zytor.com, x86@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: Re: [PATCH v2 3/4] Add support for driver cross-timestamp to PTP_SYS_OFFSET ioctl Message-ID: <20150810085310.GB18566@localhost.localdomain> References: <1438988495-9942-1-git-send-email-christopher.s.hall@intel.com> <1438988495-9942-4-git-send-email-christopher.s.hall@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1438988495-9942-4-git-send-email-christopher.s.hall@intel.com> 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 Content-Length: 808 Lines: 15 On Fri, Aug 07, 2015 at 04:01:34PM -0700, Christopher Hall wrote: > This patch allows system and device time ("cross-timestamp") to be > performed by the driver. Currently, the cross-timestamping is performed > in the PTP_SYS_OFFSET ioctl. The PTP clock driver reads gettimeofday() > and the gettime64() callback provided by the driver. The cross-timestamp > is best effort where the latency between the capture of system time > (getnstimeofday()) and the device time (driver callback) may be > significant. Acked-by: Richard Cochran -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/