From: Bodo Eggert <7eggert@gmx.de>
To: Bill Unruh <unruh@physics.ubc.ca>, linux-kernel@vger.kernel.org
Subject: Re: parport_pc disables parallel port on unload.
Date: Wed, 24 Sep 2008 14:47:46 +0200 [thread overview]
Message-ID: <E1KiTmU-0001Xx-Td@be1.7eggert.dyndns.org> (raw)
In-Reply-To: <bf4Tb-1sM-11@gated-at.bofh.it>
Bill Unruh <unruh@physics.ubc.ca> wrote:
> I have a parallel port module gps.c which I have written ( after the short
> module described in Linux Device Drivers), whose purpose is to timestamp
> the occurance of interrupts on the parallel port Ack line to as high a
> temporal accuracy as possible.These are generated by the PPS line of a Gamin
> 18LVC gps receiver. Since I want the highest accuracy possible I do not want
> the latency of going through the stock drivers and waiting for a poll or
> select to let me know an interrupt has occured.
> So, could anyone point me to some relatively comprehensible documentation (
> or "canned program") to show me how to switch the parallel port back on if
> unloading parport_pc has switched it off.
You can copy/paste the relevant parts from the parport_pc driver.
next parent reply other threads:[~2008-09-24 12:38 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bf4Tb-1sM-11@gated-at.bofh.it>
2008-09-24 12:47 ` Bodo Eggert [this message]
2008-09-24 15:50 ` Bill Unruh
2008-09-23 1:10 Bill Unruh
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