This is a discussion on Re: Help with rtc to hpet conversion of OSGPS driver - Kernel ; Rick Niles wrote: > I'm the Linux maintainer for the OSGPS (open source GPS) project. Our > last release version was based off Fedora 5 and since we have had some > hardware issues with our on board interrupt line ...
Rick Niles wrote:
> I'm the Linux maintainer for the OSGPS (open source GPS) project. Our
> last release version was based off Fedora 5 and since we have had some
> hardware issues with our on board interrupt line I was using the RTC
> interrupt to service the tracking loops. I've been trying to make the
> driver work with Fedora 7 and the 2.6.22 kernel, but the rtc_register()
> and other RTC functions seems to have been removed. I see they've been
> replaced by the corresponding HPET functions, which is great. However,
> hpet_register() always returns -16 (EBUSY). This could be because I
> lack the correct hardware (I'm running 32-bit Linux on a Athlon64 with
> an NVIDIA chipset) or some other reason.
> I'm looking for any help here. The RTC version of the code can be
> viewed at:
> Can device drivers still use the real-time clock at all? Does the
> tickless kernel effect this at all?
> Thanks for any help you can lend,
> Rick Niles.
Am I missing why you can't just use a normal kernel timer for this? You
shouldn't have to mess with the RTC or HPET directly..
Robert Han**** Saskatoon, SK, Canada
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