RE: [RFC net-next v2 4/5] net: phy: introducing support for DWC xPCS logics for EHL & TGL

[Jose Abreu]

From: Ong Boon Leong <boon.leong.ong@xxxxxxxxx>
Date: Aug/28/2019, 18:47:21 (UTC+00:00)

> xPCS is DWC Ethernet Physical Coding Sublayer that can be integrated with
> Ethernet MAC controller and acts as converter between GMII and SGMII. 

You have to be careful here because xPCS supports much more than these 
interfaces and speeds.

I would implement this thinking about the future integrations and 
leaving margin for more speeds.

As for this being a converter I'm not sure about the implementation 
logic because sometimes you can have a setup like:

MAC <-> xPCS <-> SERDES <-> SFP

SERDES and SFP may not require configuration nor even have MDIO access 
so in my view the "PHY" would then be the xPCS, no ?

---
Thanks,
Jose Miguel Abreu