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

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Message-ID: <c05700be-afbe-d3d2-a261-8f35c9b0abc5@gmail.com>
Date:   Thu, 21 Mar 2019 14:48:58 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Heiner Kallweit <hkallweit1@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        David Miller <davem@...emloft.net>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH v2 net-next] net: phy: aquantia: add downshift support

On 3/21/19 1:08 PM, Heiner Kallweit wrote:
> 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>

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
-- 
Florian