[LinuxPPS] NTPd patching

[Udo van den Heuvel]

On 2010-10-19 22:01, Ritter, Nicholas wrote:
> I am setting up a new NTP server, I have compiled the 2.6.34.7 kernel
> with PPS support.

Great!

>  I have downloaded ntp-4.2.6p2, do I still need to apply a patch to the
> NMEA driver for PPS as outlined in the Wiki?

Nope. See
http://wiki.enneenne.com/index.php/LinuxPPS_NTPD_support#Installation
about the NMEA driver.

>  I was not sure what was current on the wiki in general, 

In general it is generally current. Just ask when in doubt.

> so I assume ntp4.2.6p2 is ok to use. 

It is, for NMEA.

> I noticed that ntp4.2.6p2 docs make mention of
> a “Type 22” PPS driver, but the ntp configure script does not mention
> it, and I didn’t know if it was one in the same with the linuxPPS driver.

The type 22 refclock is offerred bij ntpd. It requires no patching at
all since it has just the PPS signal to deliver, not also NMEA data.
It uses /dev/ppsX directly, see
http://www.ece.udel.edu/~mills/ntp/html/drivers/driver22.html.

Udo