From 5afe8346225192213acf8a4cdcb98dc51b09929e Mon Sep 17 00:00:00 2001 From: Dietmar Eggemann Date: Sat, 22 Jul 2017 18:13:50 +0100 Subject: [PATCH] ANDROID: cpufreq: provide default frequency-invariance setter function Frequency-invariant accounting support based on the ratio of current frequency and maximum supported frequency is an optional feature an arch can implement. Since there are cpufreq drivers (e.g. cpufreq-dt) which can be build for different arch's a default implementation of the frequency-invariance setter function arch_set_freq_scale() is needed. This default implementation is an empty weak function which will be overwritten by a strong function in case the arch provides one. The setter function passes the cpumask of related (to the frequency change) cpus (online and offline cpus), the (new) current frequency and the maximum supported frequency. Cc: Rafael J. Wysocki Cc: Viresh Kumar Signed-off-by: Dietmar Eggemann Change-Id: I912d5815ee29e1171c498e638d1a089c5a598add Signed-off-by: Chris Redpath --- drivers/cpufreq/cpufreq.c | 11 +++++++++++ include/linux/cpufreq.h | 3 +++ 2 files changed, 14 insertions(+) diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index ea43b147a7fe..e38cab3fbe4c 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -2430,6 +2430,17 @@ int cpufreq_boost_enabled(void) } EXPORT_SYMBOL_GPL(cpufreq_boost_enabled); +/********************************************************************* + * FREQUENCY INVARIANT ACCOUNTING SUPPORT * + *********************************************************************/ + +__weak void arch_set_freq_scale(struct cpumask *cpus, + unsigned long cur_freq, + unsigned long max_freq) +{ +} +EXPORT_SYMBOL_GPL(arch_set_freq_scale); + /********************************************************************* * REGISTER / UNREGISTER CPUFREQ DRIVER * *********************************************************************/ diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 537ff842ff73..28734ee185a7 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -919,6 +919,9 @@ static inline bool policy_has_boost_freq(struct cpufreq_policy *policy) extern unsigned int arch_freq_get_on_cpu(int cpu); +extern void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq, + unsigned long max_freq); + /* the following are really really optional */ extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs; extern struct freq_attr cpufreq_freq_attr_scaling_boost_freqs; -- 2.20.1