From: Jesse Barnes <jbarnes@engr.sgi.com>
To: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Christoph Lameter <clameter@sgi.com>,
linux-kernel@vger.kernel.org, Bob Picco <Robert.Picco@hp.com>,
venkatesh.pallipadi@intel.com
Subject: Re: device driver for the SGI system clock, mmtimer
Date: Thu, 16 Sep 2004 09:09:12 -0700 [thread overview]
Message-ID: <200409160909.12840.jbarnes@engr.sgi.com> (raw)
In-Reply-To: <200409161003.39258.bjorn.helgaas@hp.com>
On Thursday, September 16, 2004 9:03 am, Bjorn Helgaas wrote:
> Christoph Lameter wrote:
> > The timer hardware was designed around the multimedia timer specification
> > by Intel but to my knowledge only SGI has implemented that standard. The
> > driver was written by Jesse Barnes.
>
> As far as I can see, drivers/char/hpet.c talks to the same hardware.
> HP sx1000 machines (and probably others) also implement the HPET.
No, it's different hardware.
> I think you should look at adding your functionality to hpet.c
> rather than adding a new driver.
I think Christoph already looked at that. And HPET doesn't provide mmap
functionality, does it? I.e. allow a userspace program to dereference the
counter register directly?
Jesse
next prev parent reply other threads:[~2004-09-16 16:14 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-16 16:03 device driver for the SGI system clock, mmtimer Bjorn Helgaas
2004-09-16 16:09 ` Jesse Barnes [this message]
2004-09-16 15:52 ` Alan Cox
2004-09-16 17:07 ` Jesse Barnes
2004-09-16 18:17 ` Robert Picco
2004-09-16 18:23 ` Jesse Barnes
2004-09-16 18:00 ` Robert Picco
2004-09-16 16:29 ` Marcello Barnaba
2004-09-16 16:30 ` Christoph Lameter
2004-09-16 18:14 ` Vojtech Pavlik
2004-09-16 18:35 ` Jesse Barnes
2004-09-16 20:34 ` Vojtech Pavlik
2004-09-16 18:46 ` Christoph Lameter
2004-09-20 21:53 ` Bjorn Helgaas
2004-09-16 16:32 ` Christoph Lameter
2004-09-16 16:54 ` Bjorn Helgaas
2004-09-16 18:07 ` Robert Picco
2004-09-16 20:05 ` Christoph Lameter
2004-09-17 1:34 ` Robert Picco
2004-09-16 18:17 ` Vojtech Pavlik
[not found] <Pine.LNX.4.58.0409082058140.28678@schroedinger.engr.sgi.com>
[not found] ` <20040908210537.585120c1.akpm@osdl.org>
2004-09-09 5:12 ` Christoph Lameter
2004-09-09 6:43 ` Jesse Barnes
2004-09-10 19:54 ` Christoph Lameter
2004-09-11 10:50 ` Christoph Hellwig
2004-09-11 15:32 ` Christoph Lameter
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