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Date:   Mon, 27 Jan 2020 17:32:41 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Russell King - ARM Linux admin <linux@...linux.org.uk>
Cc:     Jose Abreu <Jose.Abreu@...opsys.com>,
        Joao Pinto <Joao.Pinto@...opsys.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-stm32@...md-mailman.stormreply.com" 
        <linux-stm32@...md-mailman.stormreply.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        "David S. Miller" <davem@...emloft.net>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Heiner Kallweit <hkallweit1@...il.com>
Subject: Re: [RFC net-next 6/8] net: phylink: Configure MAC/PCS when link is
 up without PHY

> Presumably, all these should be visible on the ZII rev B as well?

Maybe. The two SFF mounted on most rev B are connected to ports which
only do SGMII, not 1000Base X. They tend to work by chance, and as
such, i've never taken them seriously.

If i remember correctly, you modified your board, moved the SFF over
to the normally unpopulated slots, and removed a resistor. That setup
then has the SFF connected to the 6352, which can do both SGMII and
1000BaseX.

It could also be that the 6352 does have pass through from the PCS to
the MAC, where as the 6390 does not? The 6390 is much more capable,
having 2.5G and 10G support. The SERDES registers are very different,
C45 vs C22 of the 6352.

    Andrew

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