linux-kernel - Re: [PATCH net 1/3] net: phy: realtek: add eee advertisement disable options

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Date:   Tue, 15 Nov 2016 17:30:36 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Jerome Brunet <jbrunet@...libre.com>
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        Florian Fainelli <f.fainelli@...il.com>,
        Carlo Caione <carlo@...one.org>,
        Kevin Hilman <khilman@...libre.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre TORGUE <alexandre.torgue@...com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Andre Roth <neolynx@...il.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net 1/3] net: phy: realtek: add eee advertisement disable
 options

On Tue, Nov 15, 2016 at 03:29:12PM +0100, Jerome Brunet wrote:
> On some platforms, energy efficient ethernet with rtl8211 devices is
> causing issue, like throughput drop or broken link.
> 
> This was reported on the OdroidC2 (DWMAC + RTL8211F). While the issue root
> cause is not fully understood yet, disabling EEE advertisement prevent auto
> negotiation from enabling EEE.
> 
> This patch provides options to disable 1000T and 100TX EEE advertisement
> individually for the realtek phys supporting this feature.

Looking at the code, i don't see anything specific to RealTek
here. This all seems generic. So should it be in phy.c and made a
generic OF property which can be applied to any PHY which supports
EEE.

      Andrew