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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2013-12-02 11:04:12 +0530 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-01-06 01:43:44 +0100 |
| commit | f7ba3b41e27129575201f0f9656e83fb67e86c3b (patch) | |
| tree | 3d7499edac72668560510c7345785e222da8b3d0 | |
| parent | 26ab1c62b6e1ed4720d533320d646866027ade09 (diff) | |
| download | linux-stable-f7ba3b41e27129575201f0f9656e83fb67e86c3b.tar.gz linux-stable-f7ba3b41e27129575201f0f9656e83fb67e86c3b.tar.bz2 linux-stable-f7ba3b41e27129575201f0f9656e83fb67e86c3b.zip | |
cpufreq: Introduce cpufreq_notify_post_transition()
This introduces a new 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, especially for sending transition failure
notifications.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 14 | ||||
| -rw-r--r-- | include/linux/cpufreq.h | 2 |
2 files changed, 16 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index a42e6aec4aad..a123a731ec4e 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -320,6 +320,20 @@ 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 dc196bbcf227..88aa0f342e85 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -306,6 +306,8 @@ 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, |