netdev - Re: [PATCH V6 net-next 06/11] net: Introduce a new MII time stamping interface.

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Message-ID: <20191220180122.GB3846@localhost>
Date:   Fri, 20 Dec 2019 10:01:22 -0800
From:   Richard Cochran <richardcochran@...il.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     netdev@...r.kernel.org, David Miller <davem@...emloft.net>,
        devicetree@...r.kernel.org,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Jacob Keller <jacob.e.keller@...el.com>,
        Mark Rutland <mark.rutland@....com>,
        Miroslav Lichvar <mlichvar@...hat.com>,
        Murali Karicheri <m-karicheri2@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Willem de Bruijn <willemb@...gle.com>,
        Wingman Kwok <w-kwok2@...com>
Subject: Re: [PATCH V6 net-next 06/11] net: Introduce a new MII time stamping
 interface.

On Fri, Dec 20, 2019 at 04:33:59PM +0100, Andrew Lunn wrote:
> The Marvell PHY datasheets indicate they support PTP. I've not looked
> at how they implement it, and if the current model will work.

IIRC, those parts time stamp on the MII bus input, and not in the PHY
itself, and so they offer no advantage over MAC time stamping.  I
suspect that is why there has been so little interest.

Thanks,
Richard