LKM Timemark Driver
mlewis000 at rogers.com
Wed Aug 29 19:02:33 UTC 2018
I thought his email came offlist, so I replied directly and not to list...
On 29/08/2018 7:58 AM, MLewis wrote:
> This is just the kernel side to run Timemark Mode, the mode that had
> the low jitter.
> Plus bracketed timestamps. Analysis to be done in user space.
> And with GPIO and on a Pi and similar with GPIO.
> We'd have to identify what is required for adding other hardware, but
> it can't be too hard, he says...
> The coms with the ublox come from user space code.
> I don't know what will happen when I substitute my driver with his
> refclock code.
> The coms with the setting up the ublox may have to be done with other
> software. When other software does the coms for setup with ublox, why
> maintain yet another piece of software doing that. Once the M8T is
> setup, it just runs and runs. I last touched the settings on mine two
> years ago?
On 29/08/2018 11:08 AM, MLewis wrote:
> Thanks for that tip.
> On 29/08/2018 8:05 AM, Udo van den Heuvel wrote:
>> On 29-08-18 13:58, MLewis wrote:
>>> This is just the kernel side to run Timemark Mode, the mode that
had the low jitter.
>>> Plus bracketed timestamps. Analysis to be done in user space.
>>> And with GPIO and on a Pi and similar with GPIO.
>>> We'd have to identify what is required for adding other hardware,
but it can't be too hard, he says...
>> Please look at the PPS generator for LPT in the kernel code for an
example for x86/x86_64
>> We need the ability to run on other hardware as well.
>> Kind regards,
On 29/08/2018 2:48 PM, Gary E. Miller via devel wrote:
> Yo Udo!
> On Wed, 29 Aug 2018 11:04:22 +0200
> Udo van den Heuvel via devel <devel at ntpsec.org> wrote:
>> On 29-08-18 09:37, MLewis via devel wrote:
>>> As it's a LKM, anyone can mod it to their needs, load and run it,
>>> without needing a system patch.
>> Would this be all kernel-side features we need to run the u-blox
> No kernel side features are need to run u-blox as a refclock.
> KPPS helps a lot.
> I suspect you meant is this all that is needed for Timemark mode?
More information about the devel