From: Christopher Hall <[email protected]>
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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