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=-0.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 A4F95C47247 for ; Thu, 30 Apr 2020 20:56:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7C87420836 for ; Thu, 30 Apr 2020 20:56:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=lunn.ch header.i=@lunn.ch header.b="KuPQ269b" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726561AbgD3U4z (ORCPT ); Thu, 30 Apr 2020 16:56:55 -0400 Received: from vps0.lunn.ch ([185.16.172.187]:35054 "EHLO vps0.lunn.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725844AbgD3U4z (ORCPT ); Thu, 30 Apr 2020 16:56:55 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lunn.ch; s=20171124; h=In-Reply-To:Content-Type:MIME-Version:References:Message-ID: Subject:Cc:To:From:Date:Sender:Reply-To:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=srGlQORI5YM3BP0QbPPPER+EBQuFL9ET+cm02FB3SPc=; b=KuPQ269bZ05USR9IU4UiWmH1nK eRABVVvzrEZc3xteCW/lle9qJepXuUa0iR9xQ1ODvm8rk7OKWwQQGc+/XnrkZMS2UZdpBNgdaX+ZT 6ptfVV8O15baik2xLU35dZZe6L/+oj6Xo8rZuaj3aMWOZFWWToGaqiTCPpTK+1PfAGmo=; Received: from andrew by vps0.lunn.ch with local (Exim 4.93) (envelope-from ) id 1jUGEl-000SpS-Fy; Thu, 30 Apr 2020 22:56:51 +0200 Date: Thu, 30 Apr 2020 22:56:51 +0200 From: Andrew Lunn To: Michael Walle Cc: Florian Fainelli , cphealy@gmail.com, davem@davemloft.net, hkallweit1@gmail.com, mkubecek@suse.cz, netdev@vger.kernel.org Subject: Re: [PATCH net-next v1 0/9] Ethernet Cable test support Message-ID: <20200430205651.GH107658@lunn.ch> References: <20200425180621.1140452-1-andrew@lunn.ch> <20200429160213.21777-1-michael@walle.cc> <20200429163247.GC66424@lunn.ch> <61eb35f8-3264-117d-59c2-22f0fdc36e96@gmail.com> <9caef9bbfaed5c75e72e083db8a552fd@walle.cc> <20200430194143.GF107658@lunn.ch> <4cae330197a5bdd1559dcea3482f0732@walle.cc> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4cae330197a5bdd1559dcea3482f0732@walle.cc> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Thu, Apr 30, 2020 at 10:01:55PM +0200, Michael Walle wrote: > Oh so, the time delta counter of the Marvell PHY also runs at 125MHz? ;) No idea. But 125MHz is one of the fundamental clocks rates in Ethernet, so it make sense to reuse it. > /* Accoring to the datasheet the distance to the fault is > * DELTA_TIME * 0.824 meters. A calculation like that pops up in my second set of patches where i add raw TDR data access. Andrew