#include <linux/kobject.h>
#include <linux/spinlock.h>
#include <linux/notifier.h>
+ #include <linux/sort.h>
+ #include <linux/err.h>
#include <asm/cputime.h>
+#ifdef CONFIG_BL_SWITCHER
+#include <asm/bL_switcher.h>
+#endif
static spinlock_t cpufreq_stats_lock;
return ret;
}
+ create_all_freq_table();
+ ret = sysfs_create_file(cpufreq_global_kobject,
+ &_attr_all_time_in_state.attr);
+ if (ret)
+ pr_warn("Error creating sysfs file for cpufreq stats\n");
+
return 0;
}
-static void __exit cpufreq_stats_exit(void)
+
+static void cpufreq_stats_cleanup(void)
{
unsigned int cpu;
cpufreq_stats_free_table(cpu);
cpufreq_stats_free_sysfs(cpu);
}
+ cpufreq_allstats_free();
}
+#ifdef CONFIG_BL_SWITCHER
+static int cpufreq_stats_switcher_notifier(struct notifier_block *nfb,
+ unsigned long action, void *_arg)
+{
+ switch (action) {
+ case BL_NOTIFY_PRE_ENABLE:
+ case BL_NOTIFY_PRE_DISABLE:
+ cpufreq_stats_cleanup();
+ break;
+
+ case BL_NOTIFY_POST_ENABLE:
+ case BL_NOTIFY_POST_DISABLE:
+ cpufreq_stats_setup();
+ break;
+
+ default:
+ return NOTIFY_DONE;
+ }
+
+ return NOTIFY_OK;
+}
+
+static struct notifier_block switcher_notifier = {
+ .notifier_call = cpufreq_stats_switcher_notifier,
+};
+#endif
+
+static int __init cpufreq_stats_init(void)
+{
+ int ret;
+ spin_lock_init(&cpufreq_stats_lock);
+
+ ret = cpufreq_stats_setup();
+#ifdef CONFIG_BL_SWITCHER
+ if (!ret)
+ bL_switcher_register_notifier(&switcher_notifier);
+#endif
+ return ret;
+}
+
+static void __exit cpufreq_stats_exit(void)
+{
+#ifdef CONFIG_BL_SWITCHER
+ bL_switcher_unregister_notifier(&switcher_notifier);
+#endif
+ cpufreq_stats_cleanup();
+}
+
MODULE_AUTHOR("Zou Nan hai <nanhai.zou@intel.com>");
MODULE_DESCRIPTION("'cpufreq_stats' - A driver to export cpufreq stats "
"through sysfs filesystem");