From mboxrd@z Thu Jan 1 00:00:00 1970 From: Viresh Kumar Subject: [PATCH V2 1/5] cpufreq: Introduce cpufreq_notify_post_transition() Date: Mon, 2 Dec 2013 11:04:12 +0530 Message-ID: Return-path: Received: from mail-qe0-f48.google.com ([209.85.128.48]:39160 "EHLO mail-qe0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751094Ab3LBFeW (ORCPT ); Mon, 2 Dec 2013 00:34:22 -0500 Received: by mail-qe0-f48.google.com with SMTP id gc15so12549899qeb.21 for ; Sun, 01 Dec 2013 21:34:21 -0800 (PST) Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org 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, Viresh Kumar This introduces another routine cpufreq_notify_post_transition() which can be used to send POSTCHANGE notification for new freq with or without both {PRE|POST}CHANGE notifications for last freq. This is useful at multiple places, specially for sending transition failure notifications. Signed-off-by: Viresh Kumar --- V1->V2: - Not required to push it for 3.13 anymore and can go in 3.14. - Rebased over following patchset as there were conflicts in unicore2 driver if following patchset is applied first (which should be the case): https://lkml.org/lkml/2013/10/30/553 (create cpufreq_generic_get() routine) drivers/cpufreq/cpufreq.c | 14 ++++++++++++++ include/linux/cpufreq.h | 2 ++ 2 files changed, 16 insertions(+) diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 5e27def..3b877d4 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -338,6 +338,20 @@ void cpufreq_notify_transition(struct cpufreq_policy *policy, } EXPORT_SYMBOL_GPL(cpufreq_notify_transition); +/* Do post notifications when there are chances that transition has failed */ +void cpufreq_notify_post_transition(struct cpufreq_policy *policy, + struct cpufreq_freqs *freqs, int transition_failed) +{ + cpufreq_notify_transition(policy, freqs, CPUFREQ_POSTCHANGE); + if (!transition_failed) + return; + + swap(freqs->old, freqs->new); + cpufreq_notify_transition(policy, freqs, CPUFREQ_PRECHANGE); + cpufreq_notify_transition(policy, freqs, CPUFREQ_POSTCHANGE); +} +EXPORT_SYMBOL_GPL(cpufreq_notify_post_transition); + /********************************************************************* * SYSFS INTERFACE * diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 276e646..b26bfab 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -316,6 +316,8 @@ int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); void cpufreq_notify_transition(struct cpufreq_policy *policy, struct cpufreq_freqs *freqs, unsigned int state); +void cpufreq_notify_post_transition(struct cpufreq_policy *policy, + struct cpufreq_freqs *freqs, int transition_failed); #else /* CONFIG_CPU_FREQ */ static inline int cpufreq_register_notifier(struct notifier_block *nb, -- 1.7.12.rc2.18.g61b472e