From patchwork Thu Dec 16 20:01:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Lemon X-Patchwork-Id: 12682429 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4F32FC433FE for ; Thu, 16 Dec 2021 20:07:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241221AbhLPUHr (ORCPT ); Thu, 16 Dec 2021 15:07:47 -0500 Received: from smtp5.emailarray.com ([65.39.216.39]:27082 "EHLO smtp5.emailarray.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241099AbhLPUHr (ORCPT ); Thu, 16 Dec 2021 15:07:47 -0500 Received: (qmail 30794 invoked by uid 89); 16 Dec 2021 20:01:06 -0000 Received: from unknown (HELO localhost) (amxlbW9uQGZsdWdzdmFtcC5jb21ANzEuMjEyLjEzOC4zOQ==) (POLARISLOCAL) by smtp5.emailarray.com with SMTP; 16 Dec 2021 20:01:06 -0000 From: Jonathan Lemon To: netdev@vger.kernel.org, davem@davemloft.net, kuba@kernel.org Cc: kernel-team@fb.com Subject: [PATCH 2/5] ptp: ocp: Expose clock status drift and offset Date: Thu, 16 Dec 2021 12:01:01 -0800 Message-Id: <20211216200104.266433-2-jonathan.lemon@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211216200104.266433-1-jonathan.lemon@gmail.com> References: <20211216200104.266433-1-jonathan.lemon@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Vadim Fedorenko Monitoring of clock variance could be done through checking the offset and the drift updates that are applied to atomic clocks. Expose these values as attributes for timecard. Signed-off-by: Vadim Fedorenko Signed-off-by: Jonathan Lemon --- drivers/ptp/ptp_ocp.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/drivers/ptp/ptp_ocp.c b/drivers/ptp/ptp_ocp.c index 17ad5f0d13b2..2ac5ef54fada 100644 --- a/drivers/ptp/ptp_ocp.c +++ b/drivers/ptp/ptp_ocp.c @@ -52,6 +52,8 @@ struct ocp_reg { u32 servo_offset_i; u32 servo_drift_p; u32 servo_drift_i; + u32 status_offset; + u32 status_drift; }; #define OCP_CTRL_ENABLE BIT(0) @@ -1974,6 +1976,36 @@ available_clock_sources_show(struct device *dev, } static DEVICE_ATTR_RO(available_clock_sources); +static ssize_t +clock_status_drift_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ptp_ocp *bp = dev_get_drvdata(dev); + u32 val; + int res; + + val = ioread32(&bp->reg->status_drift); + res = (val & ~INT_MAX) ? -1 : 1; + res *= (val & INT_MAX); + return sysfs_emit(buf, "%d\n", res); +} +static DEVICE_ATTR_RO(clock_status_drift); + +static ssize_t +clock_status_offset_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ptp_ocp *bp = dev_get_drvdata(dev); + u32 val; + int res; + + val = ioread32(&bp->reg->status_offset); + res = (val & ~INT_MAX) ? -1 : 1; + res *= (val & INT_MAX); + return sysfs_emit(buf, "%d\n", res); +} +static DEVICE_ATTR_RO(clock_status_offset); + static struct attribute *timecard_attrs[] = { &dev_attr_serialnum.attr, &dev_attr_gnss_sync.attr, @@ -1985,6 +2017,8 @@ static struct attribute *timecard_attrs[] = { &dev_attr_sma4.attr, &dev_attr_available_sma_inputs.attr, &dev_attr_available_sma_outputs.attr, + &dev_attr_clock_status_drift.attr, + &dev_attr_clock_status_offset.attr, &dev_attr_irig_b_mode.attr, &dev_attr_utc_tai_offset.attr, &dev_attr_ts_window_adjust.attr,