From patchwork Tue Sep 26 16:41:07 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dietmar Eggemann X-Patchwork-Id: 114269 Delivered-To: patch@linaro.org Received: by 10.140.106.117 with SMTP id d108csp4042695qgf; Tue, 26 Sep 2017 09:42:31 -0700 (PDT) X-Google-Smtp-Source: AOwi7QBawtaN4ChQjTvDPLlWEf9+orJrTsX+08zHZh3OH0q1jQDxKGe1XYRm+9Mw58DplIGOFxop X-Received: by 10.84.232.199 with SMTP id x7mr11420223plm.191.1506444151524; Tue, 26 Sep 2017 09:42:31 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1506444151; cv=none; d=google.com; s=arc-20160816; b=zyljqJH1qof7S82OEqJnbCtMuzpsnW+m+KXI/kaojkC0aY2sjEPUOSBuw45q9Hlcqm gSG5yZD5IdzuLTE++afZLRjibeDq/Si2ixoDdcdg8SkfmOoppJJKbwbZKHQraNVmZJUX aY8SpYIGv09L5YzswZCzEzjEi9f1qsf4p/v0NaQz4rhZVlRGYVP1LWfdI94Cnp+rc+r9 6aYNmZgcJkYbtxsNeCfH9kCVZO/p5rkh4h8qktvXXJq9UA232nWoCD/3Wo/u+kRHDf2k tIx3n8GjHM3vQzQ0faVeGsk57x9i6wNccZZozc1RQD/YvTWg6jgFsmjBFIm65ZGrzRcD ceMg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:message-id:date :subject:cc:to:from:arc-authentication-results; bh=jAToZap8J1VYU700rpRNNeTc2K8EvMAXtk3/9VbLeaY=; b=Ss5J71alTMUmoQTP0MfEfGnRvpPZCAHCmSlEpLGiGNHKz7/NlNAT4zp8SZ9tNcnf64 QtKlSYqHW/uhC4bvD/oP1xMNJr9i1XsW8m0yYHvKmKqE6oddMcOkHymYs7iw+gicuNN3 VGR0RQieGk9sbC1r+gKj3Z/QyoLD/5LreTeWXgFIfCAOHfE0Lc5WI73TehNubE81kVcA lylciXFmXB6OTrDis+MsCCJTQpTC9m+geIeVkBBJl/XyT47Iksa5sl074WkANAYpkC0R XGpWixk6B96zjs+fjheqWSCleqdHU/EsXEyPUn7q2zv4bqxT1CjqDJGDa39zja0sE6hc pBLA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-pm-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-pm-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id b89si6027774plb.385.2017.09.26.09.42.30; Tue, 26 Sep 2017 09:42:31 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-pm-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-pm-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-pm-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030652AbdIZQm3 (ORCPT + 12 others); Tue, 26 Sep 2017 12:42:29 -0400 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:36014 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030638AbdIZQm0 (ORCPT ); Tue, 26 Sep 2017 12:42:26 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 1AAF815BE; Tue, 26 Sep 2017 09:42:26 -0700 (PDT) Received: from e107985-lin.cambridge.arm.com (e107985-lin.cambridge.arm.com [10.1.210.41]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id B5C353F483; Tue, 26 Sep 2017 09:42:23 -0700 (PDT) From: Dietmar Eggemann To: linux-kernel@vger.kernel.org Cc: linux-pm@vger.kernel.org, linux@arm.linux.org.uk, Greg Kroah-Hartman , Russell King , Catalin Marinas , Will Deacon , Juri Lelli , Vincent Guittot , Peter Zijlstra , Morten Rasmussen , Viresh Kumar , "Rafael J . Wysocki" , Sudeep Holla Subject: [PATCH v5 02/10] cpufreq: provide default frequency-invariance setter function Date: Tue, 26 Sep 2017 17:41:07 +0100 Message-Id: <20170926164115.32367-3-dietmar.eggemann@arm.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170926164115.32367-1-dietmar.eggemann@arm.com> References: <20170926164115.32367-1-dietmar.eggemann@arm.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Frequency-invariant accounting support based on the ratio of current frequency and maximum supported frequency is an optional feature an arch can implement. Since there are cpufreq drivers (e.g. cpufreq-dt) which can be build for different arch's a default implementation of the frequency-invariance setter function arch_set_freq_scale() is needed. This default implementation is an empty weak function which will be overwritten by a strong function in case the arch provides one. The setter function passes the cpumask of related (to the frequency change) cpus (online and offline cpus), the (new) current frequency and the maximum supported frequency. Cc: Rafael J. Wysocki Cc: Viresh Kumar Signed-off-by: Dietmar Eggemann Acked-by: Rafael J. Wysocki Acked-by: Viresh Kumar --- drivers/cpufreq/cpufreq.c | 6 ++++++ include/linux/cpufreq.h | 3 +++ 2 files changed, 9 insertions(+) -- 2.11.0 diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index ea43b147a7fe..41d148af7748 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -161,6 +161,12 @@ u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy) } EXPORT_SYMBOL_GPL(get_cpu_idle_time); +__weak void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq, + unsigned long max_freq) +{ +} +EXPORT_SYMBOL_GPL(arch_set_freq_scale); + /* * This is a generic cpufreq init() routine which can be used by cpufreq * drivers of SMP systems. It will do following: diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 537ff842ff73..28734ee185a7 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -919,6 +919,9 @@ static inline bool policy_has_boost_freq(struct cpufreq_policy *policy) extern unsigned int arch_freq_get_on_cpu(int cpu); +extern void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq, + unsigned long max_freq); + /* the following are really really optional */ extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs; extern struct freq_attr cpufreq_freq_attr_scaling_boost_freqs;