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From: Rick Niles <fniles@gnupooh.org>
To: linux-kernel@vger.kernel.org
Subject: Help with rtc to hpet conversion of OSGPS driver
Date: Thu, 11 Oct 2007 08:01:32 -0400	[thread overview]
Message-ID: <470E109C.6020903@gnupooh.org> (raw)

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 I see they've been 
replaced by the corresponding HPET functions, which is great.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:
http://osgps.cvs.sourceforge.net/osgps/osgps/linuxmod.c?revision=1.12&view=markup

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.


             reply	other threads:[~2007-10-11 12:32 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-10-11 12:01 Rick Niles [this message]
2007-10-11 12:37 ` Help with rtc to hpet conversion of OSGPS driver Jan Engelhardt
2007-10-11 12:51   ` Rick Niles
2007-10-11 13:23     ` Jan Engelhardt
     [not found] <fa.nKddWg8u6TJNw86Rid83rey2q6Q@ifi.uio.no>
2007-10-12  4:20 ` Robert Hancock

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