From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.tglx.de (www.osadl.org [213.239.205.134]) by ozlabs.org (Postfix) with ESMTP id B1780DDF01 for ; Sat, 19 May 2007 00:43:19 +1000 (EST) Subject: Re: [PATCH 2.6.21-rt2] PowerPC: decrementer clockevent driver From: Thomas Gleixner To: Matt Sealey In-Reply-To: <464DB800.40702@genesi-usa.com> 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> Content-Type: text/plain Date: Fri, 18 May 2007 16:48:33 +0200 Message-Id: <1179499713.12981.75.camel@chaos> Mime-Version: 1.0 Cc: linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org, mingo@elte.hu List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 tglx