On Wed, Mar 21, 2018 at 10:44:36PM +0100, Andrew Lunn wrote: > O.K, so lets do the 20 questions approach.
:) > As far as i can see, this is not an MDIO device. It is not connected > to the MDIO bus, it has no MDIO registers, you don't even pass a valid > MDIO address in device tree. Right. There might very well be other products out there that *do* use MDIO commands. I know that there are MII time stamping asics and ip cores on the market, but I don't know all of their creative design details. > It it actually an MII bus snooper? Does it snoop, or is it actually in > the MII bus, and can modify packets, i.e. insert time stamps as frames > pass over the MII bus? It acts like a "snooper" to provide out of band time stamps, but it also can modify packets when for the one-step functionality. > When the driver talks about having three ports, does that mean it can > be on three different MII busses? Yes. HTH, Richard
