From: Ben Hutchings <redacted>
Date: Tue, 16 Oct 2012 21:09:27 +0100

I think the various kconfig options should be changed as follows:

1. Only PTP_1588_CLOCK selects PPS.
2. Nothing depends on EXPERIMENTAL.  (This stuff has been in for 18
   months and it's even being backported to RHEL 6 now.)
3. Either:
   (a) The per-driver PHC options select nothing, and the driver options
       do e.g.:
	select PTP_1588_CLOCK if IGB_PTP
   (b) The per-driver PHC options are removed and the driver options do:
	select PTP_1588_CLOCK
       (i.e. PHC support is unconditional)

Any objections to this, or preference for (a) vs (b)?

No objections, prefer (b).