dev_pm_opp_get_of_node
np = dev_pm_opp_get_of_node(opp);
EXPORT_SYMBOL_GPL(dev_pm_opp_get_of_node);
np = dev_pm_opp_get_of_node(opp);
ref_np = dev_pm_opp_get_of_node(ref);
struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp);