Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760492AbXERQb2 (ORCPT ); Fri, 18 May 2007 12:31:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756626AbXERQbV (ORCPT ); Fri, 18 May 2007 12:31:21 -0400 Received: from nommos.sslcatacombnetworking.com ([67.18.224.114]:33002 "EHLO nommos.sslcatacombnetworking.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756616AbXERQbV (ORCPT ); Fri, 18 May 2007 12:31:21 -0400 In-Reply-To: <1179499713.12981.75.camel@chaos> References: <200705172142.26739.sshtylyov@ru.mvista.com> <8E44DB06-767D-4864-8D2C-6132E4D4370B@kernel.crashing.org> <464C99FF.8080404@ru.mvista.com> <135307ED-7125-4859-8594-4B5B900D92D6@kernel.crashing.org> <464C9E67.2020909@ru.mvista.com> <6E0D5E13-C939-4FCE-81A3-F29DFA6436A2@kernel.crashing.org> <464CA222.8000407@ru.mvista.com> <464D9E7E.3090605@genesi-usa.com> <464DADFC.3080802@ru.mvista.com> <464DB800.40702@genesi-usa.com> <1179499713.12981.75.camel@chaos> Mime-Version: 1.0 (Apple Message framework v752.2) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <32E780BE-58B7-4303-AA49-1852C4C7EB50@kernel.crashing.org> Cc: Matt Sealey , Sergei Shtylyov , linuxppc-dev@ozlabs.org, mingo@elte.hu, linux-kernel@vger.kernel.org, Robert Schwebel Content-Transfer-Encoding: 7bit From: Kumar Gala Subject: Re: [PATCH 2.6.21-rt2] PowerPC: decrementer clockevent driver Date: Fri, 18 May 2007 11:31:19 -0500 To: Thomas Gleixner X-Mailer: Apple Mail (2.752.2) X-PopBeforeSMTPSenders: kumar-chaos@kgala.com,kumar-statements@kgala.com,kumar@kgala.com X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - nommos.sslcatacombnetworking.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [0 0] / [47 12] X-AntiAbuse: Sender Address Domain - kernel.crashing.org X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1033 Lines: 30 On May 18, 2007, at 9:48 AM, Thomas Gleixner wrote: > On Fri, 2007-05-18 at 15:28 +0100, Matt Sealey wrote: >>>> I guess the real question is, how high resolution does a high >>>> resolution >>>> timer need to be, >>> >>> In the order of microseconds. >> >> I think both the MPC52xx GPT0-7 and the SLT0-1 fulfil this fairly >> easily. > > There is some basic work for MPC5200 available: > > http://www.pengutronix.de/oselas/bsp/phytec/index_en.html#phyCORE- > MPC5200B-tiny I asked this earlier, but figured you might have a better insight. Is their value in having 'drivers' for more than one clock source? I'd say most (of not all) the PPC SoCs have timers on the system side that we could provide drivers for, I'm just not sure if that does anything for anyone. - k - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/