From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH net-next 00/10] PTP support for DSA and mv88e6xxx driver. Date: Wed, 14 Feb 2018 14:38:03 -0500 (EST) Message-ID: <20180214.143803.620216363485028523.davem@davemloft.net> References: <1518566871-12213-1-git-send-email-andrew@lunn.ch> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, vivien.didelot@savoirfairelinux.com, richardcochran@gmail.com, brandon.streiff@ni.com To: andrew@lunn.ch Return-path: Received: from shards.monkeyblade.net ([184.105.139.130]:57786 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1162873AbeBNTiF (ORCPT ); Wed, 14 Feb 2018 14:38:05 -0500 In-Reply-To: <1518566871-12213-1-git-send-email-andrew@lunn.ch> Sender: netdev-owner@vger.kernel.org List-ID: From: Andrew Lunn Date: Wed, 14 Feb 2018 01:07:41 +0100 > This patchset adds support for using the PTP hardware in switches > supported by the mv88e6xxx driver. The code was produces in > collaboration with Brandon Streiff doing the initial implementation, > and then Richard Cochran and Andrew Lunn making further changes and > cleanups. > > The code is sufficient to use ptp4l on a single DSA interface, either > as a master or a slave. Due to the use of an MDIO bus to access the > switch, reading hardware timestamps is slower than what ptp4l > expects. Thus it is necessary to use the option > --tx_timestamp_timeout=32. Heavy use of ethtool -S, or bridge fdb show > can also upset ptp4l. Patches to address this will follow. > > Further work is requires to support bridges using Boundary Clock or > Transparent Clock mode. > > Since the RFC, an overflow bug has been fixed. Brandon Streiff > has also Acked-by: the updates to his initial patchset. Looks great, series applied, thanks!