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Date:   Thu, 21 Jan 2021 07:06:11 -0800
From:   Richard Cochran <richardcochran@...il.com>
To:     Russell King - ARM Linux admin <linux@...linux.org.uk>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org
Subject: Re: [PATCH net-next] net: ethtool: allow MAC drivers to override
 ethtool get_ts_info

On Thu, Jan 21, 2021 at 10:27:38AM +0000, Russell King - ARM Linux admin wrote:
> As I already explained to you, you can *NOT* use kernel configuration
> to make the choice.  ARM is a multi-platform kernel, and we will not
> stand for platform choices dictated by kernel configuration options.

This has nothing to do with ARM as a platform.  The same limitation
applies to x86 and all the rest.

The networking stack does not support simultaneous PHY and MAC time
stamping.

If you enable both MAC and PHY time stamping, then only one will be
reported, and that one is the PHY.

Thanks,
Richard

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