[ntp:questions] kernel pps

[unruh]

How do I enable kernel pps? I have kernel 2.6.33-7mdb (Mandriva 2010.1)
which has a pps_core module. But even if I install that module I get no 
/dev/pps0 device not a /sys/class/pps/pps0
Somehow I have to tell it to use look at say the DCD line on the first
serial port. How do I do that?

Thanks