[LinuxPPS] after a reboot suddenly there's no more pps for serial?!

[Cirilo Bernardo]

On Mon, Apr 21, 2008 at 7:10 PM, Folkert van Heusden
<folkert at vanheusden.com> wrote:
> Ok found it:
>  - setserial package was updated (debian), without the hardpps patch
>  - pps0 is sometimes attached to lp0 and sometimes against ttyS1
>  so using the setserial package for applying the hardpps setting to the
>  serial port is not the way to go
>  hopefully Udo finds an udev-trick to make it work
>
For udev to be able to consistently name your PPS devices, the driver
needs to give some unique information to identify your device. You can
look for something unique yourself:

udevinfo -a -p /sys/class/pps/pps0
udevinfo -a -p /sys/class/pps/pps1

Have a look at existing udev scripts to see how persistent naming has
been done in those cases.  I haven't looked at the code for such a
long time, but I think the 'name' parameter used when registering may
be useful for identifying the devices.