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Date:   Fri, 3 Mar 2023 15:40:14 -0800
From:   Jakub Kicinski <kuba@kernel.org>
To:     "Russell King (Oracle)" <linux@armlinux.org.uk>
Cc:     Andrew Lunn <andrew@lunn.ch>, Michael Walle <michael@walle.cc>,
        davem@davemloft.net, f.fainelli@gmail.com, hkallweit1@gmail.com,
        kory.maincent@bootlin.com, maxime.chevallier@bootlin.com,
        netdev@vger.kernel.org, richardcochran@gmail.com,
        thomas.petazzoni@bootlin.com
Subject: Re: [PATCH RFC net-next] net: phy: add Marvell PHY PTP support
 [multicast/DSA issues]
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On Fri, 3 Mar 2023 14:03:03 +0000 Russell King (Oracle) wrote:
> > 4) Some solution to the default choice if there is no DT property.  
> 
> I thought (4) was what we have been discussing... but the problem
> seems to be that folk want to drill down into the fine detail about
> whether PHY or MAC timestamping is better than the other.

There seems to be no solid heuristic. Maybe it's better to give up 
and force the user to pick (for new drivers)?