From patchwork Thu May 12 23:27:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matej Vasilevski X-Patchwork-Id: 571903 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 A0870C433F5 for ; Thu, 12 May 2022 23:28:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1359461AbiELX2b (ORCPT ); Thu, 12 May 2022 19:28:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52468 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1359472AbiELX2X (ORCPT ); Thu, 12 May 2022 19:28:23 -0400 Received: from mxd2.seznam.cz (mxd2.seznam.cz [IPv6:2a02:598:2::210]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1AF6D34B81; Thu, 12 May 2022 16:28:21 -0700 (PDT) Received: from email.seznam.cz by email-smtpc17a.ng.seznam.cz (email-smtpc17a.ng.seznam.cz [10.23.18.18]) id 3b4a8071dfe6534f3a97211f; Fri, 13 May 2022 01:28:13 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=seznam.cz; s=beta; t=1652398093; bh=Irz5y4Fs6NYHzyfuWBHo/6l/ndZWpdRu3zSk1CvfZSg=; h=Received:From:To:Cc:Subject:Date:Message-Id:X-Mailer:In-Reply-To: References:MIME-Version:Content-Transfer-Encoding:X-szn-frgn: X-szn-frgc; b=d2ZQldvb9eKhCHkPsE+x6XnBv+m+PpcmvYKCwP8IdV9uq9EHzKSTwcO3VfP9BdLQM jBnV+nknzSoKA8KO86+3Xjn4lnQWw1ZSppN0WdysYBFFTm8TfyADsqQw/qJS02y9oH zjzvnWkbewYQWiG+MU5rRRpvLTucF5XxVuudP/gY= Received: from localhost.localdomain (ip-89-176-234-80.net.upcbroadband.cz [89.176.234.80]) by email-relay29.ng.seznam.cz (Seznam SMTPD 1.3.136) with ESMTP; Fri, 13 May 2022 01:28:08 +0200 (CEST) From: Matej Vasilevski To: linux-can@vger.kernel.org, mkl@pengutronix.de, pisa@cmp.felk.cvut.cz Cc: devicetree@vger.kernel.org, netdev@vger.kernel.org, ondrej.ille@gmail.com, martin.jerabek01@gmail.com, matej.vasilevski@seznam.cz Subject: [RFC PATCH 3/3] doc: ctucanfd: RX frames timestamping for platform devices Date: Fri, 13 May 2022 01:27:07 +0200 Message-Id: <20220512232706.24575-4-matej.vasilevski@seznam.cz> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220512232706.24575-1-matej.vasilevski@seznam.cz> References: <20220512232706.24575-1-matej.vasilevski@seznam.cz> MIME-Version: 1.0 X-szn-frgn: <86776cbb-31ff-433e-8494-c9ed56c96341> X-szn-frgc: <0> Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Update the section about timestamping RX frames with instructions how to enable it. Signed-off-by: Matej Vasilevski --- .../networking/device_drivers/can/ctu/ctucanfd-driver.rst | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/Documentation/networking/device_drivers/can/ctu/ctucanfd-driver.rst b/Documentation/networking/device_drivers/can/ctu/ctucanfd-driver.rst index 2fde5551e756..53ebdde3fffe 100644 --- a/Documentation/networking/device_drivers/can/ctu/ctucanfd-driver.rst +++ b/Documentation/networking/device_drivers/can/ctu/ctucanfd-driver.rst @@ -386,8 +386,12 @@ The CTU CAN FD core reports the exact timestamp when the frame has been received. The timestamp is by default captured at the sample point of the last bit of EOF but is configurable to be captured at the SOF bit. The timestamp source is external to the core and may be up to 64 bits -wide. At the time of writing, passing the timestamp from kernel to -userspace is not yet implemented, but is planned in the future. +wide. Currently only timestamps from platform devices are supported, +no support for PCI devices yet. To enable timestamping, recompile the +kernel with CAN_CTUCANFD_PLATFORM_ENABLE_HW_TIMESTAMPS set to yes. You +will also have to provide the timestamping counter frequency and bit +width in the device tree, see the dt-bindings documentation for more +details. Handling TX ~~~~~~~~~~~