On Mon, Sep 25, 2017 at 01:53:03PM +0200, Antoine Tenart wrote: > On Mon, Sep 25, 2017 at 11:45:32AM +0100, Russell King - ARM Linux wrote: > > Can you describe what the GoP link IRQ is doing please? > > In cases where there is no PHY connected to the MAC and no SFP cage is > used. One example is when a SOHO switch is connected directly to a > serdes lane. In such cases we still need to have a minimal link > management. The GoP link interrupt helps doing so as it raises when the > serdes is in sync and AN succeeded.
Isn't this just like a fixed link scenario, or an in-band autonegotiation scenario (both of which phylink supports natively)? The situation on Clearfog with the 88E6176 switch is pretty similar - a switch connected directly via serdes to the MAC. Currently, we configure stuff there as a fixed link, but in actual fact the 88E6176 is configured to run the CPU facing port in 1000base-X mode, and with appropriate tweaks, switching phylink to 1000base-X mode also works. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 8.8Mbps down 630kbps up According to speedtest.net: 8.21Mbps down 510kbps up
