[LinuxPPS] kernel does not see PPS on serial port
LICHTENBERGER Janos
lityi at sas.elte.hu
Fri Mar 7 12:24:57 CET 2008
>
> Aside from what Rodolfo said about it being strange that no driver is
> shown for IRQ4, I also noticed that IRQs are being assigned to
> different CPUs. Can you check with the older kernel if a driver is
> assigned and if IRQs are assigned to multiple CPUs or only to one of
> them?
As far as I recall, it was assigned to CPU1 with the old kernel too - I
have to reboot the system and check it, give me a few minutes.
> Does the order of loading modules matter? For example, if 'pps' needs
> to load before the 8250 serial driver, then interesting things can
> happen when the serial driver is compiled into the kernel but the pps
> driver loads later. I think there is a mechanism to ensure that the
> module is loaded and initialized before the inbuilt driver is
> initialized, so even if you have that strange case it should be
> possible to fix it.
>
>
Both are compiled as module
Janos
- Cirilo
>
--
--
Dr. János Lichtenberger
Space Research Group,
Eötvös University,
Budapest, Pf 32 H-1518 Hungary
Tel: +36-1-372 2934
Fax: +36-1-372 2927
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