From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756473Ab0CLJdz (ORCPT ); Fri, 12 Mar 2010 04:33:55 -0500 Received: from mail-ww0-f46.google.com ([74.125.82.46]:38032 "EHLO mail-ww0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752788Ab0CLJds (ORCPT ); Fri, 12 Mar 2010 04:33:48 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=sender:message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; b=F4i6cEI8ARUKl6YXB2oesiJPYS/zkHLbvpZvpMCya3rS+Az/B0JmLYLSD0n5gGMsWK uYb2zxd+Xyo5xP81XNg4QtouTVs+M1Av6kpBXZQY7+kUo8KSir0GYSx4x+4/b8/ddcO2 xXKvtiL026LtjidzjxC5lA8O0OJILsYIdrqps= Message-ID: <4B9A0A71.7010206@warmcat.com> Date: Fri, 12 Mar 2010 09:33:37 +0000 From: Andy Green User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.8) Gecko/20100301 Fedora/3.0.3-1.fc14 Thunderbird/3.0.3 MIME-Version: 1.0 To: Stanislav Brabec CC: Eric Miao , dbaryshkov@gmail.com, Cyril Hrubis , arminlitzel@web.de, kernel list , Dirk@opfer-online.de, lenz@cs.wisc.edu, rpurdie@rpsys.net, linux-arm-kernel , Pavel Machek , thommycheck@gmail.com, zaurus-devel@www.linuxtogo.org, omegamoon@gmail.com Subject: Re: bit errors on spitz References: <20100305212708.GC21773@elf.ucw.cz> <20100308072858.GA29939@atrey.karlin.mff.cuni.cz> <20100308082530.GA1982@atrey.karlin.mff.cuni.cz> <4B98EF5D.5000609@warmcat.com> <1268322155.3990.114.camel@hammer.suse.cz> <4B995EE1.1050609@warmcat.com> <1268384824.4963.35.camel@utx.utx.cz> In-Reply-To: <1268384824.4963.35.camel@utx.utx.cz> Content-Type: text/plain; charset=ISO-8859-2; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 03/12/10 09:07, Somebody in the thread at some point said: >> Unless there's more to it in the way the zaurus using it that regulator >> isn't programmable digitally. > > OOPS, I made a mistake and linked ISL6721 instead of ISL6271 there. > Now it is fixed: > http://www.penguin.cz/~utx/zaurus/datasheets/power/XScale/ISL6271A.pdf > > This one has I2C. It is connected to GPIO 3 (PWR_SCL) and GPIO 4 > (PWR_SDA). Thanks... that defaults to 1.3V on Vcore if you don't touch it. I guess confirm on the CPU datasheet that it's OK for your selected CPU clock speed. > I guess that Zaurus has a good power design and that voltage should be > constant enough. CF has a dedicated step down (plus 2.8V power detector In that case is the PXA CF driver PIO? Then it can be the same load on Vcore issue in disguise. -Andy