Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754103Ab1BJJU5 (ORCPT ); Thu, 10 Feb 2011 04:20:57 -0500 Received: from mail-yi0-f46.google.com ([209.85.218.46]:48931 "EHLO mail-yi0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750991Ab1BJJUy (ORCPT ); Thu, 10 Feb 2011 04:20:54 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=subject:from:to:cc:content-type:date:message-id:mime-version :x-mailer:content-transfer-encoding; b=KdC431eXvTizs1LisUCqBCUcyg6peG7OAYD6sah7Xh++WCGZqYxR+LaWhqzzGA7EZT 29Pu0fb/djKZnkdsT91jx67aBUjViSgcqTDIfLbgzSxS/IvUEnbr2JirHAd2jWHNOFdz bUEJdJTZNsF+960njsGGGFg/yu22GSBLMh6Ew= Subject: [PXA] A question about PXA310 cpufreq for 806Mhz From: Axel Lin To: linux-arm-kernel@lists.infradead.org, linux-kernel Cc: Haojian Zhuang , Eric Miao Content-Type: text/plain Date: Thu, 10 Feb 2011 17:22:51 +0800 Message-Id: <1297329771.21848.6.camel@mola> Mime-Version: 1.0 X-Mailer: Evolution 2.22.3.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2201 Lines: 66 hi, I have a device equipped with 806Mhz PXA310 cpu. After bootup, the system shows it is running with 624Mhz. # cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq 624000 # cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq 624000 # cat /proc/cpuinfo Processor : XScale-V3 based processor rev 2 (v5l) BogoMIPS : 623.00 Features : swp half thumb fastmult edsp iwmmxt CPU implementer : 0x69 CPU architecture: 5TE CPU variant : 0x0 CPU part : 0x689 CPU revision : 2 Hardware : Getac PS236 Handheld Platform Revision : 0000 Serial : 0000000000000000 I fix it by below patch and it looks ok on my device. I'm not sure if this is a proper way to fix it, I appreciate to see your comments. It is strange that I cannot find 806Mhz PXA31x CPU in the datasheet Section 6.1 PXA3XX Processor Differences. But in Section 6.7, Table 55: PXA31x Core PLL, Turbo and Run Mode Output Frequencies, I do see 806Mhz support on the table. Regards, Axel diff --git a/arch/arm/mach-pxa/cpufreq-pxa3xx.c b/arch/arm/mach-pxa/cpufreq-pxa3xx.c index 88fbec0..abf7d7a 100644 --- a/arch/arm/mach-pxa/cpufreq-pxa3xx.c +++ b/arch/arm/mach-pxa/cpufreq-pxa3xx.c @@ -210,15 +210,14 @@ static int pxa3xx_cpufreq_init(struct cpufreq_policy *policy) /* set default policy and cpuinfo */ policy->cpuinfo.min_freq = 104000; - policy->cpuinfo.max_freq = (cpu_is_pxa320()) ? 806000 : 624000; + policy->cpuinfo.max_freq = (cpu_is_pxa300()) ? 624000 : 806000; policy->cpuinfo.transition_latency = 1000; /* FIXME: 1 ms, assumed */ policy->max = pxa3xx_get_clk_frequency_khz(0); policy->cur = policy->min = policy->max; - if (cpu_is_pxa300() || cpu_is_pxa310()) + if (cpu_is_pxa300()) ret = setup_freqs_table(policy, ARRAY_AND_SIZE(pxa300_freqs)); - - if (cpu_is_pxa320()) + else if (cpu_is_pxa310() || cpu_is_pxa320()) ret = setup_freqs_table(policy, ARRAY_AND_SIZE(pxa320_freqs)); if (ret) { -- 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/