linux-kernel - Re: [PATCH net-next 1/2] ptp: add control over HW timestamp latch point

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Message-ID: <ZxhbnvaxmV0njtMu@hoboy.vegasvil.org>
Date: Tue, 22 Oct 2024 19:12:46 -0700
From: Richard Cochran <richardcochran@...il.com>
To: Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	intel-wired-lan@...ts.osuosl.org, anthony.l.nguyen@...el.com,
	przemyslaw.kitszel@...el.com, davem@...emloft.net,
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
	Aleksandr Loktionov <aleksandr.loktionov@...el.com>
Subject: Re: [PATCH net-next 1/2] ptp: add control over HW timestamp latch
 point

On Mon, Oct 21, 2024 at 04:19:54PM +0200, Arkadiusz Kubalewski wrote:
> Currently HW support of PTP/timesync solutions in network PHY chips can be
> implemented with two different approaches, the timestamp maybe latched
> either at the beginning or after the Start of Frame Delimiter (SFD) [1].

Why did 802.3-2012 change the definition of the time stamp position?

Thanks,
Richard