netdev - Re: [PATCH net-next v3 3/5] ethtool: (uapi) Add ETHTOOL_PHY

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Message-ID: <20161115134532.GB20621@lunn.ch>
Date:   Tue, 15 Nov 2016 14:45:32 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     "Allan W. Nielsen" <allan.nielsen@...rosemi.com>
Cc:     netdev@...r.kernel.org, raju.lakkaraju@...rosemi.com
Subject: Re: [PATCH net-next v3 3/5] ethtool: (uapi) Add
 ETHTOOL_PHY_DOWNSHIFT to PHY tunables

On Tue, Nov 15, 2016 at 11:20:02AM +0100, Allan W. Nielsen wrote:
> From: Raju Lakkaraju <Raju.Lakkaraju@...rosemi.com>
> 
> For operation in cabling environments that are incompatible with
> 1000BASE-T, PHY device may provide an automatic link speed downshift
> operation. When enabled, the device automatically changes its 1000BASE-T
> auto-negotiation to the next slower speed after a configured number of
> failed attempts at 1000BASE-T.  This feature is useful in setting up in
> networks using older cable installations that include only pairs A and B,
> and not pairs C and D.
> 
> Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@...rosemi.com>
> Signed-off-by: Allan W. Nielsen <allan.nielsen@...rosemi.com>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew