Re: [PATCH v3] Add support for driver cross-timestamp to PTP_SYS_OFFSET ioctl

From: Richard Cochran
Date: Thu Jul 09 2015 - 10:58:06 EST


On Wed, Jul 08, 2015 at 01:46:41PM -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.

The interface looks okay to me. Now all we need is a user of it...

Acked-by: Richard Cochran <richardcochran@xxxxxxxxx>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/