Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754861Ab3ILPox (ORCPT ); Thu, 12 Sep 2013 11:44:53 -0400 Received: from benson.vm.bytemark.co.uk ([212.110.190.137]:54691 "EHLO benson.vm.bytemark.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753264Ab3ILPow (ORCPT ); Thu, 12 Sep 2013 11:44:52 -0400 X-Greylist: delayed 320 seconds by postgrey-1.27 at vger.kernel.org; Thu, 12 Sep 2013 11:44:52 EDT Message-ID: <1379000686.10076.76.camel@kazak.uk.xensource.com> Subject: Re: [linux-sunxi] Re: [PATCH 4/4] Add arch count timer node in dts for Allwinner A20(sunxi 7i). From: Ian Campbell To: linux-sunxi@googlegroups.com Cc: Fan Rong , "coosty@163.com" , "maxime.ripard@free-electrons.com" , "daniel.lezcano@linaro.org" , "linux@arm.linux.org.uk" , "tglx@linutronix.de" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "pawel.moll@arm.co" , "rob.herring@calxeda.com" Date: Thu, 12 Sep 2013 16:44:46 +0100 In-Reply-To: <20130912145756.GD22013@e106331-lin.cambridge.arm.com> References: <1378968687-8200-1-git-send-email-cinifr@gmail.com> <1378968687-8200-5-git-send-email-cinifr@gmail.com> <20130912145756.GD22013@e106331-lin.cambridge.arm.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.4.4-3 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 886 Lines: 24 On Thu, 2013-09-12 at 15:57 +0100, Mark Rutland wrote: > > + interrupts = <1 13 0x308>, > > + <1 14 0x308>, > > + <1 11 0x308>, > > + <1 10 0x308>; > > + clock-frequency = <24000000>; > > If at all possible, your bootloader should set CNTFREQ, and > clock-frequency should only be used as a last resort when it's > impossible to get it to set CNTFREQ. It's not possible to set CNTFREQ > from the non-secure side, so guests (which might not be Linux, and might > not handle DT in the same way) may see a completely wrong frequency > value. https://groups.google.com/forum/#!topic/linux-sunxi/56Wj1IT-pKU Ian. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/