- * @this: the devfreq instance of own device.
- * @nb: the notifier block for DEVFREQ_TRANSITION_NOTIFIER list
+ + * @parent_type parent type of the device.
+ + * @this: the devfreq instance of own device.
+ + * @nb: the notifier block for DEVFREQ_TRANSITION_NOTIFIER or
+ * CPUFREQ_TRANSITION_NOTIFIER list.
+ + * @cpu_data: the state min/max/current frequency of all online cpu's