From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S268445AbUIPQOG (ORCPT ); Thu, 16 Sep 2004 12:14:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S268440AbUIPQL6 (ORCPT ); Thu, 16 Sep 2004 12:11:58 -0400 Received: from omx3-ext.sgi.com ([192.48.171.20]:20653 "EHLO omx3.sgi.com") by vger.kernel.org with ESMTP id S268355AbUIPQJl (ORCPT ); Thu, 16 Sep 2004 12:09:41 -0400 From: Jesse Barnes To: Bjorn Helgaas Subject: Re: device driver for the SGI system clock, mmtimer Date: Thu, 16 Sep 2004 09:09:12 -0700 User-Agent: KMail/1.7 Cc: Christoph Lameter , linux-kernel@vger.kernel.org, Bob Picco , venkatesh.pallipadi@intel.com References: <200409161003.39258.bjorn.helgaas@hp.com> In-Reply-To: <200409161003.39258.bjorn.helgaas@hp.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200409160909.12840.jbarnes@engr.sgi.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 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