On Thu, Feb 25, 2016 at 02:26:00PM +0100, Tomas Hlavacek wrote: > Hello! > > We have a board with a MAC in SoC that has SGMII connected through a > signal switch to either 10/100/1000 wired PHY or to a SFP cage. The > signal switch is set to pass signal to the wired PHY by default. > When the MOD-DEF0 pin from SFP cage is low (which acts as a > transceiver-present signal) the wired PHY is being disconnected and > the SGMII is passed to the SFP cage. We also have the signal > connected to a GPIO input, so we can detect the SFP presence from > software. And there is always-connected MDIO to the wired PHY. > > Now I use two different DTBs for testing purposes, one has a > configuration for the wired PHY and another one uses fixed-link for > SFP. And I have to reboot in order to switch from one to another. > > My idea is to create a "proxy PHY" module that would take state from > one of two (or more) underlying PHYs and pass it to the NIC driver. > The selection of the active PHY would come from userspace. (There > will be a board-specific > daemon that would react to the GPIO change and set the proper PHY > accordingly.) Question is how to connect the userspace? I think that > corresponding file in /sys would do the job, but I am not sure > whether it is the proper way of doing that. (?) > > What do you think about it?
Hi Tomas Have you looked at Russell Kings phylink patchset? https://lwn.net/Articles/667055/ Andrew
