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_INVALID, DKIM_SIGNED,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 14B76C47096 for ; Thu, 3 Jun 2021 13:09:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F16B2613B8 for ; Thu, 3 Jun 2021 13:09:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231263AbhFCNKr (ORCPT ); Thu, 3 Jun 2021 09:10:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54338 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229958AbhFCNKr (ORCPT ); Thu, 3 Jun 2021 09:10:47 -0400 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [IPv6:2001:4d48:ad52:32c8:5054:ff:fe00:142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0EC43C06174A; Thu, 3 Jun 2021 06:09:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: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=r7TIsj5V04l+D0UamQD44FQeHlZLEN6F8u/qHhY6riI=; b=yxDe0/P5D+/Atr8y4AhzMh0vw rcySwE2wWFoZtdo8Dzeo9LpdCqblSj4HIJ4PRZYMbeFG+aoQjs/9UnnF+jdZ6BQrVcAoftXQt4sLf BCAKSsOz7z7QN/xv/1kswt+2Eg/EJnKNYO+RAtxDw7AGIxEUCC0X6PV9W0jphZvH1iUBy7dF/wsNO V1e2KjgL6qj2Knj1hNq6EUdMw1gjI/3pZEDeaS3E3ADhCwlk5jaqC7F0ue9QmVRQkXShHI4wWvQjW s6Tzp40DuYVrPpfolHfSDio1DeaHeMLfzWJYwSjahV+hqx58zASAJR7zSa70/b3+9fovhhm/RjwKY 8qLonrQxg==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:44672) by pandora.armlinux.org.uk with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lon5j-0002nA-6s; Thu, 03 Jun 2021 14:08:55 +0100 Received: from linux by shell.armlinux.org.uk with local (Exim 4.92) (envelope-from ) id 1lon5f-00027a-7e; Thu, 03 Jun 2021 14:08:51 +0100 Date: Thu, 3 Jun 2021 14:08:51 +0100 From: "Russell King (Oracle)" To: Michael Sit Wei Hong Cc: Jose.Abreu@synopsys.com, andrew@lunn.ch, hkallweit1@gmail.com, kuba@kernel.org, netdev@vger.kernel.org, peppe.cavallaro@st.com, alexandre.torgue@foss.st.com, davem@davemloft.net, mcoquelin.stm32@gmail.com, weifeng.voon@intel.com, boon.leong.ong@intel.com, tee.min.tan@intel.com, vee.khee.wong@linux.intel.com, vee.khee.wong@intel.com, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [RESEND PATCH net-next v4 0/3] Enable 2.5Gbps speed for stmmac Message-ID: <20210603130851.GS30436@shell.armlinux.org.uk> References: <20210603115032.2470-1-michael.wei.hong.sit@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210603115032.2470-1-michael.wei.hong.sit@intel.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: Russell King (Oracle) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On Thu, Jun 03, 2021 at 07:50:29PM +0800, Michael Sit Wei Hong wrote: > Intel mGbE supports 2.5Gbps link speed by overclocking the clock rate > by 2.5 times to support 2.5Gbps link speed. In this mode, the serdes/PHY > operates at a serial baud rate of 3.125 Gbps and the PCS data path and > GMII interface of the MAC operate at 312.5 MHz instead of 125 MHz. > This is configured in the BIOS during boot up. The kernel driver is not able > access to modify the clock rate for 1Gbps/2.5G mode on the fly. The way to > determine the current 1G/2.5G mode is by reading a dedicated adhoc > register through mdio bus. How does this interact with Vladimir's "Convert xpcs to phylink_pcs_ops" series? Is there an inter-dependency between these, or a preferred order that they should be applied? Thanks. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!