From patchwork Sat Aug 31 17:23:51 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aaro Koskinen X-Patchwork-Id: 2852417 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 976889F2F4 for ; Sat, 31 Aug 2013 17:26:19 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id CD73C20278 for ; Sat, 31 Aug 2013 17:26:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1274F202F0 for ; Sat, 31 Aug 2013 17:26:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753501Ab3HaR0M (ORCPT ); Sat, 31 Aug 2013 13:26:12 -0400 Received: from filtteri5.pp.htv.fi ([213.243.153.188]:34923 "EHLO filtteri5.pp.htv.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754522Ab3HaR0L (ORCPT ); Sat, 31 Aug 2013 13:26:11 -0400 Received: from localhost (localhost [127.0.0.1]) by filtteri5.pp.htv.fi (Postfix) with ESMTP id CBC6E5A6D8A; Sat, 31 Aug 2013 20:26:09 +0300 (EEST) X-Virus-Scanned: Debian amavisd-new at pp.htv.fi Received: from smtp4.welho.com ([213.243.153.38]) by localhost (filtteri5.pp.htv.fi [213.243.153.188]) (amavisd-new, port 10024) with ESMTP id paZQa4tTD454; Sat, 31 Aug 2013 20:26:04 +0300 (EEST) Received: from blackmetal.pp.htv.fi (cs181064211.pp.htv.fi [82.181.64.211]) by smtp4.welho.com (Postfix) with ESMTP id DCB0B5BC012; Sat, 31 Aug 2013 20:26:04 +0300 (EEST) From: Aaro Koskinen To: "Rafael J. Wysocki" , Viresh Kumar , Benjamin Herrenschmidt , linux-pm@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Cc: Aaro Koskinen Subject: [PATCH v2 2/3] cpufreq: pmac64: provide cpufreq transition latency for older G5 models Date: Sat, 31 Aug 2013 20:23:51 +0300 Message-Id: <1377969832-27699-3-git-send-email-aaro.koskinen@iki.fi> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1377969832-27699-1-git-send-email-aaro.koskinen@iki.fi> References: <1377969832-27699-1-git-send-email-aaro.koskinen@iki.fi> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Spam-Status: No, score=-9.4 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Currently cpufreq ondemand governor cannot used on older G5 models, because the transition latency is set to CPUFREQ_ETERNAL. Provide a value based on a measurement on Xserve G5, which happens to be also the highest allowed latency. Signed-off-by: Aaro Koskinen --- drivers/cpufreq/pmac64-cpufreq.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/cpufreq/pmac64-cpufreq.c b/drivers/cpufreq/pmac64-cpufreq.c index 674807d..d3d1995 100644 --- a/drivers/cpufreq/pmac64-cpufreq.c +++ b/drivers/cpufreq/pmac64-cpufreq.c @@ -674,8 +674,10 @@ static int __init g5_pm72_cpufreq_init(struct device_node *cpus) g5_cpu_freqs[0].frequency = max_freq; g5_cpu_freqs[1].frequency = min_freq; + /* Based on a measurement on Xserve G5, rounded up. */ + transition_latency = 10 * NSEC_PER_MSEC; + /* Set callbacks */ - transition_latency = CPUFREQ_ETERNAL; g5_switch_volt = g5_pfunc_switch_volt; g5_switch_freq = g5_pfunc_switch_freq; g5_query_freq = g5_pfunc_query_freq;