netdev - Re: [PATCH 0/4] RFC CPSW switchdev mode

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Message-ID: <20180603000831.GA14515@lunn.ch>
Date:   Sun, 3 Jun 2018 02:08:31 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Grygorii Strashko <grygorii.strashko@...com>
Cc:     Ilias Apalodimas <ilias.apalodimas@...aro.org>,
        Ivan Vecera <ivecera@...hat.com>,
        Jiri Pirko <jiri@...nulli.us>, netdev@...r.kernel.org,
        ivan.khoronzhuk@...aro.org, nsekhar@...com,
        francois.ozog@...aro.org, yogeshs@...com, spatton@...com
Subject: Re: [PATCH 0/4] RFC CPSW switchdev mode

On Sat, Jun 02, 2018 at 06:28:22PM -0500, Grygorii Strashko wrote:

Hi Grygorii

I'm just picking out one thing here... there is lots more good stuff here.

> Additional headache is PTP: we have on PHC, but both external interfaces P1/P2
> can timestamp packets.

This should not be a problem. The Marvell switches have one PHC, but
each port can time stamp packets using this counter. Each port has its
own receive and transmit time stamp registers. So i don't think this
will cause you problems.

     Andrew