Date: Thu, 09 Jul 2015 15:01:10 -0700 (PDT)
Message-Id: <20150709.150110.1865960968554925450.davem@davemloft.net>
To: christopher.s.hall@intel.com
Cc: richardcochran@gmail.com, tglx@linutronix.de, john.stultz@linaro.org,
        john.ronciak@intel.com, linux-kernel@vger.kernel.org,
        netdev@vger.kernel.org
Subject: Re: [PATCH v3] Add support for driver cross-timestamp to
 PTP_SYS_OFFSET ioctl
From: David Miller <davem@davemloft.net>
In-Reply-To: <1436388401-32168-1-git-send-email-christopher.s.hall@intel.com>
References: <1436388401-32168-1-git-send-email-christopher.s.hall@intel.com>
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From: Christopher Hall <christopher.s.hall@intel.com>
Date: Wed,  8 Jul 2015 13:46:41 -0700

> This patch allows system and device time ("cross-timestamp") to be
> performed by the driver. Currently, the cross-timestamping is performed
> in the PTP_SYS_OFFSET ioctl.  The PTP clock driver reads gettimeofday()
> and the gettime64() callback provided by the driver. The cross-timestamp
> is best effort where the latency between the capture of system time
> (getnstimeofday()) and the device time (driver callback) may be
> significant.

Please resubmit this once there is an actual user of this new
facility, not beforehand.

Thank you.
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