Re: [PATCH v2] tile: support PTP using the tilegx mPIPE (IEEE 1588)

From: Richard Cochran
Date: Thu Jul 25 2013 - 13:56:10 EST

On Thu, Jul 25, 2013 at 11:19:38AM -0400, Chris Metcalf wrote:
> Signed-off-by: Chris Metcalf <cmetcalf@xxxxxxxxxx>
> ---
> v2:
> - Moved Kconfig stanza to drivers/ethernet/tile/Kconfig
> - Clarify minimum and maximum frequency adjustments

So if the requested frequency adjustment lies within the +/-30 ppm
interval, then you return EINVAL? Maybe ERANGE would be better.
Perhaps the driver should just round to the closest value it can
support? Unfortunately, we don't have a way to communicate this kind
of limitation to user space.

> - Merge PTP support into tilegx.c driver source code directly
> - Support SIOCSHWTSTAMP ioctl appopriately
> - Rebased to be the last patch in the series to simplify development

Anyhow, this looks much better to me now.

Acked-by: Richard Cochran <richardcochran@xxxxxxxxx>
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