On Sat, 4 Sep 2010, Christian Riesch wrote: > Richard's idea is to support clock hardware for IEEE 1588 (PTP, Precision Time > Protocol). Have a look at the earlier discussions: > > http://lkml.org/lkml/2010/8/16/90 A superficial scan does not give me any definite agreement on an approach. The patchset also needs to be CCed to John Stultz. Without a summary I still am not clear what this is supposed to address. Tuning of the PTP clock can be done with driver specific configuration rather than a new POSIX clock. That is at least how SGI_CYCLE is operating which is similar. > http://lkml.org/lkml/2010/8/23/49 Ok this goes more into something that may prove useful but it would be very helpful still to have a clear discussion as to why this is all needed. From what I can tell the functionality is already there and another clock device (CLOCK_SGI_CYCLE) is already providing a model for how a PTP clock could be controlled and used. -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html