Hi Rene, On Thu, Aug 22, 2019 at 07:50:33PM +0000, René van Dorst wrote: > Quoting Russell King - ARM Linux admin <li...@armlinux.org.uk>: > > 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 compare > 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
