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Message-ID: <BN8PR12MB32666F34D45D7881BDD4CAB3D3350@BN8PR12MB3266.namprd12.prod.outlook.com>
Date:   Mon, 13 Jan 2020 13:54:28 +0000
From:   Jose Abreu <Jose.Abreu@...opsys.com>
To:     Andrew Lunn <andrew@...n.ch>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Joao Pinto <Joao.Pinto@...opsys.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "Heiner Kallweit" <hkallweit1@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Russell King <rmk+kernel@....linux.org.uk>
Subject: RE: [RFC net-next] net: phy: Add basic support for Synopsys XPCS
 using a PHY driver

From: Andrew Lunn <andrew@...n.ch>
Date: Jan/13/2020, 13:38:45 (UTC+00:00)

> On Mon, Jan 13, 2020 at 02:11:08PM +0100, Jose Abreu wrote:
> > Adds the basic support for XPCS including support for USXGMII.
> 
> Hi Jose
> 
> Please could you describe the 'big picture'. What comes after the
> XPCS? An SFP? A copper PHY? How in Linux do you combine this PHY and
> whatever comes next using PHYLINK?
> 
> Or do only support backplane with this, and the next thing in the line
> is the peers XPCS?

My current setup is this:

Host PC x86 -> PCI -> XGMAC -> XPCS -> SERDES 10G-BASE-R -> QSFP+

The only piece that needs configuration besides XGMAC is the XPCS hereby 
I "called" it a PHY ... Anyway, this is an RFC because I'm not entirely 
sure about the approach. Hmm ?

---
Thanks,
Jose Miguel Abreu

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