From patchwork Tue Feb 11 18:45:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ionela Voinescu X-Patchwork-Id: 11376707 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id F1449924 for ; Tue, 11 Feb 2020 18:47:33 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CFA89215A4 for ; Tue, 11 Feb 2020 18:47:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="GcDxwWAI" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CFA89215A4 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=27ARQD44aF0KcvLhHHLEsUkoe0r7FNvohHZCLhOdpyA=; b=GcDxwWAIOwRi2WQhzRHF3NkzP5 s7dqySVUasVNSChAUFxLToRf8t1CrVOxuQdD7jj/X9Tcs8XtQo3/k551T06e01jZTQ0tbUeXf2S0N akDdmYoSFzXckQcS8o5v2seRXHXb+P6LXUwajuzNx5vyZobxMZxWMJBJf7Hdm26IK1mYG2ZBKtA2t L5vn+7HxMx9etZE6/SArNV6TNlC7KcssoOhFCZN/axgMKcR6VejJ+VXeIkOUpnW0V+ZpiVfzVjFWm p8j5r6fHqNPgPI8V4a2uzkCJ+eTa2k8E1Qsf3yIfq+fXDd4O0Am9ZPYfAztbpk8UpvXrmtkGRC+jl 0HxsZ52A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1j1aZF-0005uE-1E; Tue, 11 Feb 2020 18:47:29 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1j1aYP-00053j-KL for linux-arm-kernel@lists.infradead.org; Tue, 11 Feb 2020 18:46:40 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id D37FB30E; Tue, 11 Feb 2020 10:46:36 -0800 (PST) Received: from e108754-lin.cambridge.arm.com (e108754-lin.cambridge.arm.com [10.1.198.52]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id A4BC73F68F; Tue, 11 Feb 2020 10:46:34 -0800 (PST) From: Ionela Voinescu To: catalin.marinas@arm.com, will@kernel.org, mark.rutland@arm.com, maz@kernel.org, suzuki.poulose@arm.com, sudeep.holla@arm.com, lukasz.luba@arm.com, valentin.schneider@arm.com, rjw@rjwysocki.net, ionela.voinescu@arm.com Subject: [PATCH v3 5/7] cpufreq: add function to get the hardware max frequency Date: Tue, 11 Feb 2020 18:45:40 +0000 Message-Id: <20200211184542.29585-6-ionela.voinescu@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200211184542.29585-1-ionela.voinescu@arm.com> References: <20200211184542.29585-1-ionela.voinescu@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200211_104637_752299_512EEC55 X-CRM114-Status: GOOD ( 10.84 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [217.140.110.172 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-doc@vger.kernel.org, peterz@infradead.org, viresh.kumar@linaro.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@redhat.com, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Add weak function to return the hardware maximum frequency of a CPU, with the default implementation returning cpuinfo.max_freq. The default can be overwritten by a strong function in platforms that want to provide an alternative implementation. Signed-off-by: Ionela Voinescu Cc: Rafael J. Wysocki Cc: Viresh Kumar Acked-by: Viresh Kumar --- drivers/cpufreq/cpufreq.c | 20 ++++++++++++++++++++ include/linux/cpufreq.h | 5 +++++ 2 files changed, 25 insertions(+) diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 77114a3897fb..d2ff3018861d 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -1733,6 +1733,26 @@ unsigned int cpufreq_quick_get_max(unsigned int cpu) } EXPORT_SYMBOL(cpufreq_quick_get_max); +/** + * cpufreq_get_hw_max_freq - get the max hardware frequency of the CPU + * @cpu: CPU number + * + * The default return value is the max_freq field of cpuinfo. + */ +__weak unsigned int cpufreq_get_hw_max_freq(unsigned int cpu) +{ + struct cpufreq_policy *policy = cpufreq_cpu_get(cpu); + unsigned int ret_freq = 0; + + if (policy) { + ret_freq = policy->cpuinfo.max_freq; + cpufreq_cpu_put(policy); + } + + return ret_freq; +} +EXPORT_SYMBOL(cpufreq_get_hw_max_freq); + static unsigned int __cpufreq_get(struct cpufreq_policy *policy) { if (unlikely(policy_is_inactive(policy))) diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 31b1b0e03df8..b4423ff619f4 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -194,6 +194,7 @@ extern struct kobject *cpufreq_global_kobject; unsigned int cpufreq_get(unsigned int cpu); unsigned int cpufreq_quick_get(unsigned int cpu); unsigned int cpufreq_quick_get_max(unsigned int cpu); +unsigned int cpufreq_get_hw_max_freq(unsigned int cpu); void disable_cpufreq(void); u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy); @@ -223,6 +224,10 @@ static inline unsigned int cpufreq_quick_get_max(unsigned int cpu) { return 0; } +static inline unsigned int cpufreq_get_hw_max_freq(unsigned int cpu) +{ + return 0; +} static inline void disable_cpufreq(void) { } #endif