netdev - Re: [PATCH] net: mvneta: speed down the PHY, if WoL used, to save energy

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Message-Id: <20200513.152133.211500623458865365.davem@davemloft.net>
Date:   Wed, 13 May 2020 15:21:33 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     dgcbueu@...il.com
Cc:     netdev@...r.kernel.org, thomas.petazzoni@...tlin.com
Subject: Re: [PATCH] net: mvneta: speed down the PHY, if WoL used, to save
 energy

From: Daniel González Cabanelas <dgcbueu@...il.com>
Date: Tue, 12 May 2020 19:59:48 +0200

> Some PHYs connected to this ethernet hardware support the WoL feature.
> But when WoL is enabled and the machine is powered off, the PHY remains
> waiting for a magic packet at max speed (i.e. 1Gbps), which is a waste of
> energy.
> 
> Slow down the PHY speed before stopping the ethernet if WoL is enabled,
> and save some energy while the machine is powered off or sleeping.
> 
> Tested using an Armada 370 based board (LS421DE) equipped with a Marvell
> 88E1518 PHY.
> 
> Signed-off-by: Daniel González Cabanelas <dgcbueu@...il.com>

Applied to net-next, thanks.