netdev - Re: [RFC] Support for SGMII 2500

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Date:   Tue, 28 Nov 2017 15:13:04 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Madalin-cristian Bucur <madalin.bucur@....com>
Cc:     Bhaskar Upadhaya <bhaskar.upadhaya@....com>,
        "f.fainelli@...il.com" <f.fainelli@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Shengzhou Liu <shengzhou.liu@....com>,
        York Sun <york.sun@....com>,
        "u-boot@...ts.denx.de" <u-boot@...ts.denx.de>,
        Anji Jagarlmudi <anji.jagarlmudi@....com>,
        Calvin Johnson <calvin.johnson@....com>,
        Poonam Aggrwal <poonam.aggrwal@....com>,
        Prabhakar Kushwaha <prabhakar.kushwaha@....com>
Subject: Re: [RFC] Support for SGMII 2500

> Hi Andrew,
> 
> Bhaskar is working on enabling a PFE [1] MAC connected to an Aquantia AQR107 
> PHY [2] on a LS1012AQDS board. Initially I've indicated 2500Base-X too, but it
> seems the HW actually works in SGMII mode. The QDS boards are lower volume,
> higher spec boards than the RDBs [3], they exercise most of the HW capabilities.

The webpage for the AQR107 lists 2500Base-X, so i assume the issue is
with the MAC? Ideally you want to use 2500Base-X, since this is wider
known.

Anyway, you seem to have a legitimate need for it.

However, i would prefer a different name. The convention is to put the
number first. So PHY_INTERFACE_MODE_2500SGMII.

       Andrew