[ntp:hackers] u-blox reference clock driver

[Achim Gratz]

Gary E. Miller via devel writes:
> We probably need to work with linuxpps, but we may have an easier time
> working with the folks that maintain the Raspberry Pi fork.  The last
> time I asked for a dtb change it took one day to get in git head.

The only thing that linuxpps would be the correct target for is getting
the PPS echo facility to do something useful with GPIO (and maybe
serial, but that's a whole 'nother driver to consider).

In any case, having a timstamped _output_ facility is much more useful
than bolting doodads onto the PPS echo (that was originally meant as a
debug facility) and should be more easily acceptable for upstream when
made sufficiently general.

> Lukas told me, privately, he had already submitted it the the
> LKM folks and been overwhelmed by the changes they requested.  So
> the patch will clearly need work.

That does not surprise me, given it's all a pretty ugly hack that really
only works for the one single thing he's needed it for.  I'm not blaming
him, just a reminder that getting things upstream takes a lot more apple
polishing.

> Has anyone applied the patch and checked it out?

I haven't, mainly because I've tied up both machines where I can
reasonably quickly recompile the kernel and don't want to take them off
their current duty without a replacement.


Regards,
Achim.
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