From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: [PATCH 1/1] libata: pata_pdc2027x PLL input clock fix Date: Thu, 16 Aug 2007 15:11:02 -0400 Message-ID: <46C4A146.6090701@garzik.org> References: <200707092304.l69N4Ggd023137@harpo.it.uu.se> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from srv5.dvmed.net ([207.36.208.214]:56437 "EHLO mail.dvmed.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752292AbXHPTLK (ORCPT ); Thu, 16 Aug 2007 15:11:10 -0400 In-Reply-To: <200707092304.l69N4Ggd023137@harpo.it.uu.se> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Mikael Pettersson Cc: albertl@mail.com, alan@lxorguk.ukuu.org.uk, bahadir.balban@gmail.com, dwm@enoyolf.org, linux-ide@vger.kernel.org, linuxppc-dev@ozlabs.org, sshtylyov@ru.mvista.com Mikael Pettersson wrote: > (cc:ing linuxppc-dev) > > On Tue, 26 Jun 2007 13:43:15 +0800, Albert Lee wrote: >> Recently the PLL input clock of pata_pdc2027x is sometimes detected >> higer than expected (e.g. 20.027 MHz compared to 16.714 MHz). >> It seems sometimes the mdelay() function is not as precise as it >> used to be. Per Alan's advice, HT or power management might affect >> the precision of mdelay(). >> >> This patch calls gettimeofday() to mesure the time elapsed and >> calculate the PLL input clock accordingly. > > Unfortunately this breaks pata_pdc2027x on my PowerMac G3: Did this ever get resolved? Jeff