Merge tag 'v3.10.107' into update

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / cpufreq / cpufreq.c

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index d85c4180095297a66acc406bb9df3c9f17d06b26..b9174608c6871964e6d3a439350866f1f42c7b2b 100644 (file)
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -17,7 +17,9 @@
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
+#include <asm/cputime.h>
 #include <linux/kernel.h>
+#include <linux/kernel_stat.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/notifier.h>
@@ -25,6 +27,7 @@
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/spinlock.h>
+#include <linux/tick.h>
 #include <linux/device.h>
 #include <linux/slab.h>
 #include <linux/cpu.h>
@@ -133,6 +136,51 @@ bool have_governor_per_policy(void)
 {
        return cpufreq_driver->have_governor_per_policy;
 }
+EXPORT_SYMBOL_GPL(have_governor_per_policy);
+
+struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy)
+{
+       if (have_governor_per_policy())
+               return &policy->kobj;
+       else
+               return cpufreq_global_kobject;
+}
+EXPORT_SYMBOL_GPL(get_governor_parent_kobj);
+
+static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall)
+{
+       u64 idle_time;
+       u64 cur_wall_time;
+       u64 busy_time;
+
+       cur_wall_time = jiffies64_to_cputime64(get_jiffies_64());
+
+       busy_time = kcpustat_cpu(cpu).cpustat[CPUTIME_USER];
+       busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SYSTEM];
+       busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_IRQ];
+       busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SOFTIRQ];
+       busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_STEAL];
+       busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_NICE];
+
+       idle_time = cur_wall_time - busy_time;
+       if (wall)
+               *wall = cputime_to_usecs(cur_wall_time);
+
+       return cputime_to_usecs(idle_time);
+}
+
+u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy)
+{
+       u64 idle_time = get_cpu_idle_time_us(cpu, io_busy ? wall : NULL);
+
+       if (idle_time == -1ULL)
+               return get_cpu_idle_time_jiffy(cpu, wall);
+       else if (!io_busy)
+               idle_time += get_cpu_iowait_time_us(cpu, wall);
+
+       return idle_time;
+}
+EXPORT_SYMBOL_GPL(get_cpu_idle_time);
 
 static struct cpufreq_policy *__cpufreq_cpu_get(unsigned int cpu, bool sysfs)
 {