linux-kernel - Re: [PATCH net-next 10/13] net: mvpp2: reset the XPCS while reconfiguring the serdes lanes

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Message-ID: <20190218105222.GD3784@kwain>
Date:   Mon, 18 Feb 2019 11:52:22 +0100
From:   Antoine Tenart <antoine.tenart@...tlin.com>
To:     Russell King - ARM Linux admin <linux@...linux.org.uk>
Cc:     Antoine Tenart <antoine.tenart@...tlin.com>, davem@...emloft.net,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        thomas.petazzoni@...tlin.com, maxime.chevallier@...tlin.com,
        gregory.clement@...tlin.com, miquel.raynal@...tlin.com,
        nadavh@...vell.com, stefanc@...vell.com, ymarkman@...vell.com,
        mw@...ihalf.com
Subject: Re: [PATCH net-next 10/13] net: mvpp2: reset the XPCS while
 reconfiguring the serdes lanes

Russell,

On Mon, Feb 18, 2019 at 10:47:57AM +0000, Russell King - ARM Linux admin wrote:
> 
> Another case that needs to be considered: if the XPCS should be placed
> into reset while reconfiguring the serdes lanes, is the same treatment
> needed for the GMAC?

That's something I wanted to check as well. I don't know for the GMAC,
while I'm sure the documentation explicitly state to put the XPCS in
reset when reconfiguring the lanes.

Antoine

-- 
Antoine Ténart, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com