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: <CO2PR04MB218421921CC649BC026F34669F7E0@CO2PR04MB2184.namprd04.prod.outlook.com>
Date:   Fri, 29 Sep 2017 15:28:02 +0000
From:   Brandon Streiff <brandon.streiff@...com>
To:     Andrew Lunn <andrew@...n.ch>
CC:     "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>,
        Richard Cochran <richardcochran@...il.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

> From: Andrew Lunn [mailto:andrew@...n.ch]
> Sent: Thursday, September 28, 2017 11:57 AM
> 
> It is the MAC which is doing the time stamping, not they PHY?
> So why NETWORK_PHY_TIMESTAMPING?

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.

-- brandon