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 X-Spam-Level: X-Spam-Status: No, score=-3.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 45940C3A59C for ; Fri, 16 Aug 2019 16:32:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1DE2020665 for ; Fri, 16 Aug 2019 16:32:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="bFlPjlEb" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726961AbfHPQcT (ORCPT ); Fri, 16 Aug 2019 12:32:19 -0400 Received: from mail-wr1-f66.google.com ([209.85.221.66]:36859 "EHLO mail-wr1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725971AbfHPQcT (ORCPT ); Fri, 16 Aug 2019 12:32:19 -0400 Received: by mail-wr1-f66.google.com with SMTP id r3so2117006wrt.3; Fri, 16 Aug 2019 09:32:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=J314qdUvz12V6d3QViRALM7rawvrwtwSfJHkRDPm5Hw=; b=bFlPjlEbw16qXErPnq5piBe7z3XTDmnzeoiTTCa7lc/N9m/opz9lUSrcjavE9JorkZ ogHzZOEyqVTNQ29Wfj+KQ6HXetYWVNw44ukOtf2YM7iaRbDHWQuamn2ZiJe2ZBRWjPGg /V1Lk3DwUZUEFaUQfPny1AKHESiMWuA1DRdKdh1evm8msptix+KZXlHrnKOXSsk5a5iU MpVlOZY5tzglGEYHY7nDPG8rzcRAiO7fks7ZhcMR7gCSiAlnMd0N4DBpZAhazBgCpv/u pGdfGTgQLCiNJ3PskruNkCZmVRO75aVGcqnyorAWE/4WGX3IkgAR76HI5gwQqZJx4sz2 Ob7Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=J314qdUvz12V6d3QViRALM7rawvrwtwSfJHkRDPm5Hw=; b=ogxq41SWjEuwW/SS3SQTojLB2WFJhKjjpGkChtSwT3TrhV2kgfKXarW1mAgH8eGQYL ydfGN9kp/An8hM7gKS54xDgPAiPeGOOb18fijuo2JLP3IUUQ1jQbrCG7+2KYTgpW5w08 9H1LIdD1PiGiuWQh0PGL3PeInrh1SPMhGOINhawvdy0OD3q37cUrTdRVwJuYByS0Lfzz 9FnLcOow0Tf17wI5/NoBKeoTv7VO8oDq0ICPNwmNaOHy1KzGwU4Lj/w3q+JQ2aS+92JR QeJAD7+R1/azML/MYXwcBLb0BNUnvsk+OdCrAKg6pSYeZBX9zRS4T9fPDftykbJCSMGZ y/MA== X-Gm-Message-State: APjAAAWgRg9th8H+t1va+ezOZ8QfXD/sPH4pSCydgpiZzjrxttDuwMmQ kWo1/07u2rdKnwI9Dk68b9cmcTm4NGk= X-Google-Smtp-Source: APXvYqzkC/sFkwVKPTSaPC2A+NnLvZAz6bMhSLia3Uf5bqM63YYSyf50PbcbsfXUKBK5OQl5rwiQKw== X-Received: by 2002:adf:fd82:: with SMTP id d2mr11692806wrr.194.1565973136985; Fri, 16 Aug 2019 09:32:16 -0700 (PDT) Received: from vd-lxpc-hfe.ad.vahle.at ([80.110.31.209]) by smtp.gmail.com with ESMTPSA id d19sm11031677wrb.7.2019.08.16.09.32.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 Aug 2019 09:32:16 -0700 (PDT) From: Hubert Feurstein To: netdev@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Hubert Feurstein , Andrew Lunn , Richard Cochran , Vivien Didelot , Florian Fainelli , Heiner Kallweit , Vladimir Oltean , Fugang Duan , "David S. Miller" Subject: [PATCH net-next 0/3] Improve phc2sys precision for mv88e6xxx switch in combination with imx6-fec Date: Fri, 16 Aug 2019 18:31:54 +0200 Message-Id: <20190816163157.25314-1-h.feurstein@gmail.com> X-Mailer: git-send-email 2.22.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org With this patchset the phc2sys synchronisation precision improved to +/-555ns on an IMX6DL with an MV88E6220 switch attached. This patchset takes into account the comments from the following discussions: - https://lkml.org/lkml/2019/8/2/1364 - https://lkml.org/lkml/2019/8/5/169 Patch 01 adds the required infrastructure in the MDIO layer. Patch 02 adds support for the PTP_SYS_OFFSET_EXTENDED ioctl in the mv88e6xxx driver. Patch 03 adds support for the PTP system timestamping in the imx-fec driver. The following tests show the improvement caused by each patch. The system clock precision was set to 15ns instead of 333ns (as described in https://lkml.org/lkml/2019/8/2/1364). Without this patchset applied, the phc2sys synchronisation performance was very poor: offset: min -27120 max 28840 mean 2.44 stddev 8040.78 count 1236 delay: min 282103 max 386385 mean 352568.03 stddev 27814.27 count 1236 (test runtime 20 minutes) Results after appling patch 01 and 02: offset: min -12316 max 13314 mean -9.38 stddev 4274.82 count 1022 delay: min 69977 max 96266 mean 87939.04 stddev 6466.17 count 1022 (test runtime 16 minutes) Results after appling patch 03: offset: min -788 max 528 mean -0.06 stddev 185.02 count 7171 delay: min 1773 max 2031 mean 1909.43 stddev 33.74 count 7171 (test runtime 119 minutes) Hubert Feurstein (3): net: mdio: add support for passing a PTP system timestamp to the mii_bus driver net: dsa: mv88e6xxx: extend PTP gettime function to read system clock net: fec: add support for PTP system timestamping for MDIO devices drivers/net/dsa/mv88e6xxx/chip.h | 2 + drivers/net/dsa/mv88e6xxx/ptp.c | 11 ++- drivers/net/dsa/mv88e6xxx/smi.c | 3 +- drivers/net/ethernet/freescale/fec_main.c | 3 + drivers/net/phy/mdio_bus.c | 105 ++++++++++++++++++++++ include/linux/mdio.h | 7 ++ include/linux/phy.h | 25 ++++++ 7 files changed, 151 insertions(+), 5 deletions(-) -- 2.22.1