Re: [PATCH v2 3/4] Add support for driver cross-timestamp to PTP_SYS_OFFSET ioctl

From: Richard Cochran
Date: Mon Aug 10 2015 - 04:53:20 EST

On Fri, Aug 07, 2015 at 04:01:34PM -0700, Christopher Hall wrote:
> 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.

Acked-by: Richard Cochran <richardcochran@xxxxxxxxx>
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