linux-kernel - Re: [PATCH] RTC: Add mmap method to rtc character driver

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Message-Id: <1154493292.17171.15.camel@cog.beaverton.ibm.com>
Date:	Tue, 01 Aug 2006 21:34:52 -0700
From:	john stultz <johnstul@...ibm.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Dave Airlie <airlied@...il.com>,
	Neil Horman <nhorman@...driver.com>,
	Segher Boessenkool <segher@...nel.crashing.org>,
	linux-kernel@...r.kernel.org, a.zummo@...ertech.it,
	jg@...edesktop.org
Subject: Re: [PATCH] RTC: Add mmap method to rtc character driver

On Tue, 2006-08-01 at 21:26 -0700, H. Peter Anvin wrote:
> john stultz wrote:
> > 
> > Only lightly tested, so beware, and I've only added support so far for
> > the TSC (so don't be surprised if you don't see a performance
> > improvement if you using a different clocksource).
> > 
> 
> We should be able to use HPET in userspace, too.

Oh yes, HPET and Cyclone as well. It just requires mapping their mmio
page as user readable. I just haven't gotten to it yet. :)

-john

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