Re: [RFC PATCH net-next v3 4/5] net: dsa: qca8k: flag QCA8337 internal CPU PHYs for SmartSpeed

[Andrew Lunn]

> Disabling downshift for all qca83xx PHYs would also remove it from the
> user ports, where I have not seen it misbehave. The CPU link has no
> cable, only a fixed on-board connection

How are the two ports coupled?

Are there magnetics? Capacitor coupling?

Anything like what Micrel suggests? 

https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ApplicationNotes/ApplicationNotes/ANLAN120-UNG.pdf

    Andrew