From mboxrd@z Thu Jan 1 00:00:00 1970 From: Francisco Alecrim Subject: Re: problem with n810 boot up Date: Wed, 06 Jan 2010 22:04:58 -0400 Message-ID: <4B45414A.9010805@gmail.com> References: <200912290152.16357.luke@dashjr.org> <20100106224520.GA29239@gandalf> <4B45167F.8020605@gmail.com> <201001070233.36120.siarhei.siamashka@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from mail-yw0-f176.google.com ([209.85.211.176]:47962 "EHLO mail-yw0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756608Ab0AGCFG (ORCPT ); Wed, 6 Jan 2010 21:05:06 -0500 Received: by ywh6 with SMTP id 6so18055485ywh.4 for ; Wed, 06 Jan 2010 18:05:04 -0800 (PST) In-Reply-To: <201001070233.36120.siarhei.siamashka@gmail.com> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Siarhei Siamashka Cc: "linux-omap@vger.kernel.org" , Luke-Jr , "Balbi Felipe (Nokia-D/Helsinki)" Siarhei Siamashka wrote: > On Thursday 07 January 2010, Francisco Alecrim wrote: >> Felipe Balbi wrote: >>> On Wed, Jan 06, 2010 at 06:11:10PM -0400, Francisco Alecrim wrote: >>>> Thanks! Now it goes to rootfs and continue the boot, but device >>>> power-off after 10-20 seconds. There is no error message to help. :( >>> watchdog ? >>> >>> how about disabling watchdog with flasher ?? >> I'm using the flags (no-omap-wd,no-retu-wd,no-lifeguard-reset) >> recommended by Kalle[1]. This's not the problem. :( > > If I read these recommendations correctly, they tell to *clear* these R&D > flags. So probably it's better not to have them enabled. > > Moreover, based on the following post, watchdog is hardwired and just can't be > disabled by any software methods: > http://lists.maemo.org/pipermail/maemo-developers/2007-June/010650.html > > Your powerdown problem is exactly caused by a watchdog. Earlier a solution was > to have a script which would kick watchdog periodically. But right now it is > kicked automatically in the kernel if CONFIG_CBUS_RETU_WDT option is enabled. > You also need to enable CONFIG_WATCHDOG, CONFIG_CBUS and probably some other > stuff. Thanks for this explanation. I works fine with the flags you indicate. :) > > This all also means that CBUS is critical for correct N8x0 operation and these > devices simply can't work without it at all. Well, if it's critical to n8x0 operation then it should be in n8x0_defconfig. > > Hope this information helps. > Thanks, Alecrim.