netdev - Re: [PATCH net-next 1/2] net: phy: Add Speed downshift set driver for Microsemi PHYs.

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Message-ID: <20161014121232.GH5822@lunn.ch>
Date:   Fri, 14 Oct 2016 14:12:32 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Raju Lakkaraju <Raju.Lakkaraju@...rosemi.com>
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        f.fainelli@...il.com, Allan.Nielsen@...rosemi.com
Subject: Re: [PATCH net-next 1/2] net: phy: Add Speed downshift set driver
 for Microsemi PHYs.

On Fri, Oct 14, 2016 at 05:10:32PM +0530, Raju Lakkaraju wrote:
> From: Raju Lakkaraju <Raju.Lakkaraju@...rosemi.com>
> 
> For operation in cabling environments that are incompatible with
> 1000BAST-T, VSC8531 device provides an automatic link speed
> downshift operation. When enabled, the device automatically changes
> its 1000BAST-T auto-negotiation to the next slower speed after
> a configured number of failed attempts at 1000BAST-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.

Any reason not to just turn this on by default when auto-neg is
enabled?

	Andrew