[LinuxPPS] Which patch to use?

[Jordan Hayes]

New guy alert!

I'm running stock Debian with a 2.6.18 kernel.  I went here:

http://ftp.enneenne.com/pub/misc/linuxpps/patches/

I see there are patches up to 2.6.24 ... but there are three of them: 
null, bis, and ter.  Which one do I use?  Maybe this is an FAQ, but it's 
not in the README.

On the wiki page:

http://wiki.enneenne.com/index.php/LinuxPPS_support

It says "Once you have chosen a patch" which at least leads me to 
believe that I only need one; what do 'ter' and 'bis' mean?

Ok, so I picked the non-bis, non-ter one, and patched against 2.6.24.7 
from kernel.org, and then ran make menuconfig and my screens look like 
those on the wiki.  On reboot I got this from dmesg:

LinuxPPS API ver. 1 registered
Software ver. 5.0.0 - Copyright 2005-2007 Rodolfo Giometti 
<giometti at linux.it>
Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A

But: /sys/class/pps is empty ... it is suggested to try 'modprobe 8250' 
but that doesn't change anything for me.

It feels close, but am I not using the right patch?

Thanks!

/jordan