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Commit f7ba3b41 authored by Viresh Kumar's avatar Viresh Kumar Committed by Rafael J. Wysocki
Browse files

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: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 26ab1c62

drivers/cpufreq/cpufreq.c

+14 −0
Original line number Original line Diff line number Diff line
@@ -320,6 +320,20 @@ void cpufreq_notify_transition(struct cpufreq_policy *policy, 
}

}

EXPORT_SYMBOL_GPL(cpufreq_notify_transition);

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                          *

 *                          SYSFS INTERFACE                          *

include/linux/cpufreq.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -306,6 +306,8 @@ int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); 




void cpufreq_notify_transition(struct cpufreq_policy *policy,

void cpufreq_notify_transition(struct cpufreq_policy *policy,

		struct cpufreq_freqs *freqs, unsigned int state);

		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 */

#else /* CONFIG_CPU_FREQ */

static inline int cpufreq_register_notifier(struct notifier_block *nb,

static inline int cpufreq_register_notifier(struct notifier_block *nb,