linux-kernel - Re: [PATCH net-next RFC 2/9] net: dsa: mv88e6xxx: expose switch time as a PTP hardware clock

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Message-ID: <20171008115902.xsd3a7a7fslcljdj@localhost>
Date:   Sun, 8 Oct 2017 07:59:06 -0400
From:   Richard Cochran <richardcochran@...il.com>
To:     Brandon Streiff <brandon.streiff@...com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
        Erik Hons <erik.hons@...com>
Subject: Re: [PATCH net-next RFC 2/9] net: dsa: mv88e6xxx: expose switch time
 as a PTP hardware clock

On Fri, Sep 29, 2017 at 03:28:02PM +0000, Brandon Streiff wrote:
> 
> NETWORK_PHY_TIMESTAMPING implies NET_PTP_CLASSIFY (which I do use)
> and net/core/timestamping.c (which I didn't). It probably makes more
> sense to just depend on NET_PTP_CLASSIFY directly.

Yes, that makes sense to do, if you can make it work.

With my driver I tried depending on NET_PTP_CLASSIFY, but there was
some Kconfig issue, and rather than figuring it out I did the lazy
thing and used NETWORK_PHY_TIMESTAMPING.

Thanks,
Richard