From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Green Subject: Re: [PATCH] ARM: omap4: i2c reset regs postidle Date: Thu, 21 Apr 2011 13:13:15 +0100 Message-ID: <4DB01F5B.5080607@linaro.org> References: <1303386420-12997-1-git-send-email-j.weitzel@phytec.de> Reply-To: andy.green@linaro.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-ww0-f44.google.com ([74.125.82.44]:39573 "EHLO mail-ww0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751547Ab1DUMNU (ORCPT ); Thu, 21 Apr 2011 08:13:20 -0400 Received: by wwa36 with SMTP id 36so2022197wwa.1 for ; Thu, 21 Apr 2011 05:13:19 -0700 (PDT) In-Reply-To: <1303386420-12997-1-git-send-email-j.weitzel@phytec.de> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Jan Weitzel Cc: linux-omap@vger.kernel.org, patches@linaro.org, andy@warmcat.com, tony@atomide.com, peter.maydell@linaro.org, ben-linux@fluff.org On 04/21/2011 12:47 PM, Somebody in the thread at some point said: > Without OMAP_I2C_FLAG_RESET_REGS_POSTIDLE I got i2c controller > timeouts on each accsess after an NACK message. > Taking this flag fix it. Ahhh that will explain why if you accidentally configure LM75 system monitor support, which isn't there on Panda, the I2C controllers die slowly on boot. Good catch! -Andy