netdev - Re: [PATCH v2 net-next] net: phy: aquantia: add downshift support

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Message-Id: <20190322.102649.1517677518680387646.davem@davemloft.net>
Date:   Fri, 22 Mar 2019 10:26:49 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     hkallweit1@...il.com
Cc:     andrew@...n.ch, f.fainelli@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH v2 net-next] net: phy: aquantia: add downshift support

From: Heiner Kallweit <hkallweit1@...il.com>
Date: Thu, 21 Mar 2019 21:08:35 +0100

> Aquantia PHY's of the AQR107 family support the downshift feature.
> Add support for it as standard PHY tunable so that it can be controlled
> via ethtool.
> The AQCS109 supports a proprietary 2-pair 1Gbps mode. If two such PHY's
> are connected to each other with a 2-pair cable, they may not be able
> to establish a link if both advertise modes > 1Gbps.
> 
> v2:
> - add downshift event detection
> - warn if downshift occurred
> - read downshifted rate from vendor register
> - enable downshift per default on all AQR107 family members
> 
> Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>

Applied, thanks Heiner.