From patchwork Mon Dec 2 05:52:34 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Viresh Kumar X-Patchwork-Id: 295777 X-Patchwork-Delegate: swarren@nvidia.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id BDE8D2C0079 for ; Mon, 2 Dec 2013 16:54:07 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753104Ab3LBFxw (ORCPT ); Mon, 2 Dec 2013 00:53:52 -0500 Received: from mail-qe0-f42.google.com ([209.85.128.42]:65440 "EHLO mail-qe0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752964Ab3LBFw5 (ORCPT ); Mon, 2 Dec 2013 00:52:57 -0500 Received: by mail-qe0-f42.google.com with SMTP id b4so11949112qen.29 for ; Sun, 01 Dec 2013 21:52:57 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:in-reply-to:references; bh=MIWrPyJ5/a0TyUzqgI8j2W78kA1plZRKuBHkFrl4dj0=; b=HA9Rj8bu9bDX6rG7d9SBiwW+z2cwWSUI3m7DLyM0V5AMQJrnUNqF1MI3M23oPAZIBC rNki7FZbzRkUZQWr5nbL/zjh1YKdAT4Sf1NTgqWSrJU3UnQpIpSH99LsoYjzG5VvQ4qO aUKJWBTj60O6zYvnL6Jhp09s3zO429bJcIBqaW8r7EU3dzKpjhuQ92/4xSF+U8aGQo1C vr4evQUzdQ84MRrTpmOyzIoMe0JCvetD2s/jt+vWfAcYZ7cv5gfgqTItyupX3f2orvNy Raf2wSidhLqzP/BvltHDXvq92Ov7DKw/KXPqhn8UughcopYfVBdc4tS0tten5PJ4F3Dw k7OQ== X-Gm-Message-State: ALoCoQldMCj0zWbyjhH9nGpXK9vFKjDY1yEF9foCqn+K2CK2Khb3yzPIT47ZSji4X2A2WtS24XWU X-Received: by 10.224.7.10 with SMTP id b10mr111998027qab.12.1385963577055; Sun, 01 Dec 2013 21:52:57 -0800 (PST) Received: from localhost (git.linaro.org. [54.235.93.228]) by mx.google.com with ESMTPSA id w5sm20216504qat.10.2013.12.01.21.52.55 for (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Sun, 01 Dec 2013 21:52:56 -0800 (PST) From: Viresh Kumar To: rjw@rjwysocki.net Cc: linaro-kernel@lists.linaro.org, patches@linaro.org, cpufreq@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, nm@ti.com, swarren@wwwdotorg.org, kgene.kim@samsung.com, linux-samsung-soc@vger.kernel.org, linux-tegra@vger.kernel.org, tianyu.lan@intel.com, jhbird.choi@samsung.com, Viresh Kumar Subject: [PATCH V4 4/6] cpufreq: exynos: Use cpufreq_generic_suspend() Date: Mon, 2 Dec 2013 11:22:34 +0530 Message-Id: <653a95bc01de9f02f04a10fcea496fda221a1fb3.1385962528.git.viresh.kumar@linaro.org> X-Mailer: git-send-email 1.7.12.rc2.18.g61b472e In-Reply-To: References: In-Reply-To: References: Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org Currently we have implemented PM notifiers to disable/enable ->target() routines functionality during suspend/resume. Now we have support present in cpufreq core, lets use it. Signed-off-by: Viresh Kumar --- drivers/cpufreq/exynos-cpufreq.c | 96 +++------------------------------------- 1 file changed, 7 insertions(+), 89 deletions(-) diff --git a/drivers/cpufreq/exynos-cpufreq.c b/drivers/cpufreq/exynos-cpufreq.c index 0b3689c..ded4cf8 100644 --- a/drivers/cpufreq/exynos-cpufreq.c +++ b/drivers/cpufreq/exynos-cpufreq.c @@ -16,19 +16,14 @@ #include #include #include -#include #include #include "exynos-cpufreq.h" static struct exynos_dvfs_info *exynos_info; - static struct regulator *arm_regulator; - static unsigned int locking_frequency; -static bool frequency_locked; -static DEFINE_MUTEX(cpufreq_lock); static int exynos_cpufreq_get_index(unsigned int freq) { @@ -133,83 +128,13 @@ out: static int exynos_target(struct cpufreq_policy *policy, unsigned int index) { - struct cpufreq_frequency_table *freq_table = exynos_info->freq_table; - int ret = 0; - - mutex_lock(&cpufreq_lock); - - if (frequency_locked) - goto out; - - ret = exynos_cpufreq_scale(freq_table[index].frequency); - -out: - mutex_unlock(&cpufreq_lock); - - return ret; -} - -#ifdef CONFIG_PM -static int exynos_cpufreq_suspend(struct cpufreq_policy *policy) -{ - return 0; -} - -static int exynos_cpufreq_resume(struct cpufreq_policy *policy) -{ - return 0; -} -#endif - -/** - * exynos_cpufreq_pm_notifier - block CPUFREQ's activities in suspend-resume - * context - * @notifier - * @pm_event - * @v - * - * While frequency_locked == true, target() ignores every frequency but - * locking_frequency. The locking_frequency value is the initial frequency, - * which is set by the bootloader. In order to eliminate possible - * inconsistency in clock values, we save and restore frequencies during - * suspend and resume and block CPUFREQ activities. Note that the standard - * suspend/resume cannot be used as they are too deep (syscore_ops) for - * regulator actions. - */ -static int exynos_cpufreq_pm_notifier(struct notifier_block *notifier, - unsigned long pm_event, void *v) -{ - int ret; - - switch (pm_event) { - case PM_SUSPEND_PREPARE: - mutex_lock(&cpufreq_lock); - frequency_locked = true; - mutex_unlock(&cpufreq_lock); - - ret = exynos_cpufreq_scale(locking_frequency); - if (ret < 0) - return NOTIFY_BAD; - - break; - - case PM_POST_SUSPEND: - mutex_lock(&cpufreq_lock); - frequency_locked = false; - mutex_unlock(&cpufreq_lock); - break; - } - - return NOTIFY_OK; + return exynos_cpufreq_scale(exynos_info->freq_table[index].frequency); } -static struct notifier_block exynos_cpufreq_nb = { - .notifier_call = exynos_cpufreq_pm_notifier, -}; - static int exynos_cpufreq_cpu_init(struct cpufreq_policy *policy) { policy->clk = exynos_info->cpu_clk; + policy->suspend_freq = locking_frequency; return cpufreq_generic_init(policy, exynos_info->freq_table, 100000); } @@ -223,8 +148,7 @@ static struct cpufreq_driver exynos_driver = { .name = "exynos_cpufreq", .attr = cpufreq_generic_attr, #ifdef CONFIG_PM - .suspend = exynos_cpufreq_suspend, - .resume = exynos_cpufreq_resume, + .suspend = cpufreq_generic_suspend, #endif }; @@ -259,19 +183,13 @@ static int __init exynos_cpufreq_init(void) goto err_vdd_arm; } + /* Done here as we want to capture boot frequency */ locking_frequency = clk_get_rate(exynos_info->cpu_clk) / 1000; - register_pm_notifier(&exynos_cpufreq_nb); - - if (cpufreq_register_driver(&exynos_driver)) { - pr_err("%s: failed to register cpufreq driver\n", __func__); - goto err_cpufreq; - } - - return 0; -err_cpufreq: - unregister_pm_notifier(&exynos_cpufreq_nb); + if (!cpufreq_register_driver(&exynos_driver)) + return 0; + pr_err("%s: failed to register cpufreq driver\n", __func__); regulator_put(arm_regulator); err_vdd_arm: kfree(exynos_info);