Messages in this thread Patch in this message | | | From | Viresh Kumar <> | Subject | [PATCH V2 1/5] cpufreq: Introduce cpufreq_notify_post_transition() | Date | Mon, 2 Dec 2013 11:04:12 +0530 |
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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 <viresh.kumar@linaro.org> ---
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
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