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=-2.4 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, 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 E164CC433DF for ; Thu, 2 Jul 2020 20:04:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A68592088E for ; Thu, 2 Jul 2020 20:04:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="dKCPjOpm" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726119AbgGBUEo (ORCPT ); Thu, 2 Jul 2020 16:04:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42840 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725915AbgGBUEn (ORCPT ); Thu, 2 Jul 2020 16:04:43 -0400 Received: from mail-wm1-x341.google.com (mail-wm1-x341.google.com [IPv6:2a00:1450:4864:20::341]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0052CC08C5C1; Thu, 2 Jul 2020 13:04:42 -0700 (PDT) Received: by mail-wm1-x341.google.com with SMTP id g10so9696459wmc.1; Thu, 02 Jul 2020 13:04:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=pXq9disgHLt9GBV0pwwRmM40yiapw6jXrYFzU9ELtYE=; b=dKCPjOpmYL9C4m73nq3Bb1NKmDYjXgXmdng67PHDhQPObjGKzqS3BJ0vmTFBbr62Jr 9D80+DX+He0RerTsGOvLbjLqC9W3NoJ8jvq2pdbW66jZZFJ0dQ22RY7KJIYzGDutYZL+ 3YkL3qjkXoEtPknTR3cUebjRMG0WpBXG60oYsycec8q9ZdwHWG/qMeHxl9ljkAhF+rEJ Uf09n3Ylgjac1IAU2yZvjueQsI/haWiE8mWxZ7EdTGIwRFtyDc8BcJuuJJFLoQDfg9vL iW0YolB6LKEhtWPXw4P0iaZG/e6tzLpJSBkjQimmbvo/xMoBd8VkoNoQug0RhSFgcOvL i1LA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=pXq9disgHLt9GBV0pwwRmM40yiapw6jXrYFzU9ELtYE=; b=Xi6XEh9/zUVxVruOiBPnUQvXKlE+i/xbCMAGgx3zOJF0dWIpb5mAtb2dKuG6/niK/K /g4dvk206Cji7BNlOWSoA79/QjDrE8paE42xgSp5myVzOB0afnq0mELwcUn4Uz5nA/No HkrW7EQ2rLUbPadZa3QEMo6xldIXh2TL6YMjmVjcsK3b/ucMkjL/FL3gL+1lPe8LfrpJ DB9EeWTR5jMiFfcW7n+gewokn/xpY/q4qR+QgQRqIFz/Jr0WKN1Bni3iswhkxpvKTtIE 8Nbkgd4R7/cNdXg1eRdAxyFoNcJXwz75SPmuArSX9RfoH7Iy0Rd1If8whXCuq9QKVDTd UF3Q== X-Gm-Message-State: AOAM53122aTj5WvPJVKneToY/y/MN0i7osRb0RyABxnVKOVdI4OKtZfv A/lzTCuPNulBrmoxQcwiiYs= X-Google-Smtp-Source: ABdhPJwUZcL1Xeu7gExBO2h9ZoAaNCI8QVciXggW2GVVON9/DsAkuiBiamu0YWMY0kXQ1AtCcyJRIw== X-Received: by 2002:a05:600c:2f17:: with SMTP id r23mr31598111wmn.167.1593720281729; Thu, 02 Jul 2020 13:04:41 -0700 (PDT) Received: from [10.230.30.107] ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id w17sm12674826wra.42.2020.07.02.13.04.38 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 02 Jul 2020 13:04:41 -0700 (PDT) Subject: Re: [net-next,PATCH 4/4] dt-bindings: mdio-ipq4019: add clock support To: Robert Marko , Andrew Lunn Cc: Heiner Kallweit , Russell King - ARM Linux admin , David Miller , kuba@kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm , Andy Gross , Bjorn Andersson , robh+dt@kernel.org References: <20200702103001.233961-1-robert.marko@sartura.hr> <20200702103001.233961-5-robert.marko@sartura.hr> <20200702133842.GK730739@lunn.ch> From: Florian Fainelli Message-ID: <42ebc500-35ba-48f6-c4d1-3743abde1852@gmail.com> Date: Thu, 2 Jul 2020 13:04:37 -0700 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Firefox/68.0 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 7/2/2020 12:18 PM, Robert Marko wrote: > On Thu, Jul 2, 2020 at 3:38 PM Andrew Lunn wrote: >> >>> + clock-frequency: >>> + default: 100000000 >> >> IEEE 802.3 says the default should be 2.5MHz. Some PHYs will go >> faster, but 100MHz seems unlikely! > This MDIO controller has an internal divider, by default its set for > 100MHz clock. > In IPQ4019 MDIO clock is not controllable but in IPQ6018 etc it's controllable. > That is the only combination I have currently seen used by Qualcomm. Not sure I understand here, the 'clock-frequency' is supposed to denote the MDIO bus output clock frequency, that is the frequency at which all MDIO devices are going to operate at. Is this 100MHz a clock that feeds into the MDIO block and get internally divided by a programmable register to obtain an output MDIO clock? -- Florian