LKM Timemark Driver

[MLewis]

Sorry,
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?
>
> Michael
>



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:
 >> Michael,
 >>
 >> 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,
 >> Udo




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
>> refclock?
> 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?
>
> RGDS
> GARY