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=-5.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 AECBEC433E3 for ; Thu, 27 Aug 2020 16:25:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 84FEF22B4D for ; Thu, 27 Aug 2020 16:25:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="fgF1uQ8h" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726876AbgH0QZ6 (ORCPT ); Thu, 27 Aug 2020 12:25:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48168 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726200AbgH0QZ5 (ORCPT ); Thu, 27 Aug 2020 12:25:57 -0400 Received: from mail-pf1-x444.google.com (mail-pf1-x444.google.com [IPv6:2607:f8b0:4864:20::444]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 10F93C061264; Thu, 27 Aug 2020 09:25:55 -0700 (PDT) Received: by mail-pf1-x444.google.com with SMTP id x143so3909086pfc.4; Thu, 27 Aug 2020 09:25:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=1HTBOiQwFo90quHJ+LNDvRWLBbY5CwhPJGAyaR2M3rE=; b=fgF1uQ8hk7szifJefmtG8YlLyBYbkFuO5D/fHJE2YABdNu3+qUvqRVor2R/kkHTHzZ aXLP27TSWWCRxjRwMZ2HAXGsVwd9iNkYXeN2k48SvF1xyUSoIZS3CljhbHJisqBK8yxa /4BTfA9urApZfXgXY0w75iGJHNRhMximsnQYC7muiV1V3GTU551YrjxM6Zm4nX9cmbSc BGleHLu7btgvDx4kfN4c8jtnpSA8vz5zsMS6Wj3pE+IxekWhsxnbm5jfw9ytgN36mTYs 2eE8de0svmHfEk1xbeXZX1MwTMWSgis53LshKnenZlf0DgTkHPO8tLqvMJgKUNixO49k YquA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=1HTBOiQwFo90quHJ+LNDvRWLBbY5CwhPJGAyaR2M3rE=; b=FbPK4j83bLjkKQpMBWwCoRNgAA8GJuf8DNKFDh7gW+STmdHy1OO0BlXuPtyzcETwjV 4LVkDKDO+co8byJD5aQBMKkVk65ACIUXfZ1TaoZ4t3zvhkpz5o9V0Jb05qzie+JTYba8 xXJ6ZgXT8iTxtv7y5zW4LuaJoYFApQU18i48fwlvkKzhWK36kICtqkx1ca6yxYu7/Rc5 lbmVLcS356W3MbXvc/lyZzZ3812jZchrCIG0YkWHn+imrHDmo7yBft3SXqoQmxg7c0tr gkdMFTWeLpb6GivXOaWVWyxy3HrLdaVIoPrrkgXlJMrt/NlpELPCktCOMoAiCSZgr2ca JFxA== X-Gm-Message-State: AOAM5310AJtAdxNHIzhupQRpIoqBNUIJFNJynBgTiREyCPkoMxm5ht9c +aYkrOHmeK25Jr+bIRRxB/A= X-Google-Smtp-Source: ABdhPJzLm5ON71Oba+P4rBOhH2xDiarke+2hUWZAUpL5C2qgl29GPkob3YbUsPKsFduHMYJgE9YvMA== X-Received: by 2002:a17:902:9349:: with SMTP id g9mr17114212plp.313.1598545554571; Thu, 27 Aug 2020 09:25:54 -0700 (PDT) Received: from hoboy (c-73-241-114-122.hsd1.ca.comcast.net. [73.241.114.122]) by smtp.gmail.com with ESMTPSA id n72sm3490767pfd.93.2020.08.27.09.25.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Aug 2020 09:25:53 -0700 (PDT) Date: Thu, 27 Aug 2020 09:25:51 -0700 From: Richard Cochran To: Kurt Kanzenbach Cc: Vladimir Oltean , Andrew Lunn , Vivien Didelot , Florian Fainelli , "David S. Miller" , Jakub Kicinski , netdev@vger.kernel.org, Rob Herring , devicetree@vger.kernel.org, Sebastian Andrzej Siewior , Kamil Alkhouri , ilias.apalodimas@linaro.org Subject: Re: [PATCH v3 5/8] net: dsa: hellcreek: Add TAPRIO offloading support Message-ID: <20200827162551.GB13292@hoboy> References: <20200820081118.10105-1-kurt@linutronix.de> <20200820081118.10105-6-kurt@linutronix.de> <20200824225615.jtikfwyrxa7vxiq2@skbuf> <878se3133y.fsf@kurt> <20200825093830.r2zlpowtmhgwm6rz@skbuf> <871rjv123q.fsf@kurt> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <871rjv123q.fsf@kurt> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Tue, Aug 25, 2020 at 11:55:37AM +0200, Kurt Kanzenbach wrote: > > I get your point. But how to do it? We would need a timer based on the > PTP clock in the switch. Can't you use an hrtimer based on CLOCK_MONOTONIC? I would expect the driver to work based solely on the device's clock. Thanks, Richard