dev_pm_opp_get_max_transition_latency
transition_latency = dev_pm_opp_get_max_transition_latency(cpu_dev);
transition_latency = dev_pm_opp_get_max_transition_latency(cpu_dev);
EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_transition_latency);
unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev);