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Received: from shell.armlinux.org.uk ([2001:4d48:ad52:3201:5054:ff:fe00:4ec]:48168) by pandora.armlinux.org.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.90_1) (envelope-from ) id 1i0uNE-0000W5-M7; Thu, 22 Aug 2019 22:12:00 +0100 Received: from linux by shell.armlinux.org.uk with local (Exim 4.92) (envelope-from ) id 1i0uNA-00081K-Dh; Thu, 22 Aug 2019 22:11:56 +0100 Date: Thu, 22 Aug 2019 22:11:56 +0100 From: Russell King - ARM Linux admin To: =?iso-8859-1?Q?Ren=E9?= van Dorst Subject: Re: [PATCH net-next v2 2/3] net: ethernet: mediatek: Re-add support SGMII Message-ID: <20190822211156.GV13294@shell.armlinux.org.uk> References: <20190821144336.9259-1-opensource@vdorst.com> <20190821144336.9259-3-opensource@vdorst.com> <20190822144433.GT13294@shell.armlinux.org.uk> <20190822195033.Horde.hEW8FBGNfFrugQOCv0gaDfx@www.vdorst.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190822195033.Horde.hEW8FBGNfFrugQOCv0gaDfx@www.vdorst.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190822_141218_589830_8B64B114 X-CRM114-Status: GOOD ( 10.43 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Nelson Chang , Frank Wunderlich , netdev@vger.kernel.org, Sean Wang , linux-mips@vger.kernel.org, linux-mediatek@lists.infradead.org, John Crispin , Matthias Brugger , Stefan Roese , "David S . Miller" , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Rene, On Thu, Aug 22, 2019 at 07:50:33PM +0000, Ren=E9 van Dorst wrote: > Quoting Russell King - ARM Linux admin : > > Isn't this set for Cisco SGMII as well as for 802.3 1000BASE-X and > > the up-clocked 2500BASE-X modes? > > = > > If so, is there a reason why 10Mbps and 100Mbps speeds aren't > > supported on Cisco SGMII links? > = > I can only tell a bit about the mt7622 SOC, datasheet tells me that: > = > The SGMII is the interface between 10/100/1000/2500 Mbps PHY and Ethernet= MAC, > the spec is raised by Cisco in 1999, which is aims for pin reduction comp= are > with the GMII. It uses 2 differential data pair for TX and RX with clock > embedded bit stream to convey frame data and port ability information. > The core leverages the 1000Base-X PCS and Auto-Negotiation from IEEE 802.3 > specification (clause 36/37). This IP can support up to 3.125G baud for > 2.5Gbps > (proprietary 2500Base-X) data rate of MAC by overclocking. > = > Also features tells me: Support 10/100/1000/2500 Mbps in full duplex mode= and > 10/100 Mbps in half duplex mode. Yep, that is what I'd expect. Thanks. -- = RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps = up According to speedtest.net: 11.9Mbps down 500kbps up _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel