netdev - RE: [RFC] Support for SGMII 2500

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Date:   Tue, 28 Nov 2017 15:37:17 +0000
From:   Madalin-cristian Bucur <madalin.bucur@....com>
To:     Andrew Lunn <andrew@...n.ch>
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

> -----Original Message-----
> From: Andrew Lunn [mailto:andrew@...n.ch]
> Sent: Tuesday, November 28, 2017 4:13 PM
> To: Madalin-cristian Bucur <madalin.bucur@....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

OK,

I just wanted to make sure 2.5G SGMII is to be added separately from the
"normal" SGMII, as it was done in u-boot. Thanks also for the naming hint.

Madalin