cpufreq: governor: New sysfs show/store callbacks for governor tunables

[deliverable/linux.git] / drivers / cpufreq / cpufreq_governor.h

diff --git a/drivers/cpufreq/cpufreq_governor.h b/drivers/cpufreq/cpufreq_governor.h
index e296362d21d2e0b838fc526660b89c705a6ec46a..bdb6e4940b756d243240254bf283ba300af0e8d7 100644 (file)
--- a/drivers/cpufreq/cpufreq_governor.h
+++ b/drivers/cpufreq/cpufreq_governor.h
@@ -160,8 +160,44 @@ struct dbs_data {
        unsigned int sampling_rate;
        unsigned int sampling_down_factor;
        unsigned int up_threshold;
+
+       struct kobject kobj;
+       /* Protect concurrent updates to governor tunables from sysfs */
+       struct mutex mutex;
+};
+
+/* Governor's specific attributes */
+struct dbs_data;
+struct governor_attr {
+       struct attribute attr;
+       ssize_t (*show)(struct dbs_data *dbs_data, char *buf);
+       ssize_t (*store)(struct dbs_data *dbs_data, const char *buf,
+                        size_t count);
 };
 
+#define gov_show_one(_gov, file_name)                                  \
+static ssize_t show_##file_name                                                \
+(struct dbs_data *dbs_data, char *buf)                                 \
+{                                                                      \
+       struct _gov##_dbs_tuners *tuners = dbs_data->tuners;            \
+       return sprintf(buf, "%u\n", tuners->file_name);                 \
+}
+
+#define gov_show_one_common(file_name)                                 \
+static ssize_t show_##file_name                                                \
+(struct dbs_data *dbs_data, char *buf)                                 \
+{                                                                      \
+       return sprintf(buf, "%u\n", dbs_data->file_name);               \
+}
+
+#define gov_attr_ro(_name)                                             \
+static struct governor_attr _name =                                    \
+__ATTR(_name, 0444, show_##_name, NULL)
+
+#define gov_attr_rw(_name)                                             \
+static struct governor_attr _name =                                    \
+__ATTR(_name, 0644, show_##_name, store_##_name)
+
 /* Common to all CPUs of a policy */
 struct policy_dbs_info {
        struct cpufreq_policy *policy;
@@ -236,8 +272,7 @@ struct dbs_governor {
        #define GOV_ONDEMAND            0
        #define GOV_CONSERVATIVE        1
        int governor;
-       struct attribute_group *attr_group_gov_sys; /* one governor - system */
-       struct attribute_group *attr_group_gov_pol; /* one governor - policy */
+       struct kobj_type kobj_type;
 
        /*
         * Common data for platforms that don't set