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Date:   Mon, 29 Apr 2019 15:10:16 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     "Ong, Boon Leong" <boon.leong.ong@...el.com>
Cc:     "Voon, Weifeng" <weifeng.voon@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Kweh, Hock Leong" <hock.leong.kweh@...el.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Jose Abreu <joabreu@...opsys.com>
Subject: Re: [PATCH 0/7] net: stmmac: enable EHL SGMII

> Sorry for the delay, we have checked with hardware/SoC HW architect
> and gotten confirmation that the controller can only support SGMII inter-chip
> connection. It does not support 1000Base-X. 

O.K, i'm surprised about that, but if that is what the hardware
engineer says...

> In this case, we believe that the current implementation of the DW xPCS
> are sufficient. Ok?

Yes, if all i can do is SGMII, hard coding SGMII is fine. But you
should probably check phy-mode and return an error if it has a value
other than SGMII,

      Andrew

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