dev_pm_opp_calc_power
EXPORT_SYMBOL_GPL(dev_pm_opp_calc_power);
EM_SET_ACTIVE_POWER_CB(em_cb, dev_pm_opp_calc_power);
int dev_pm_opp_calc_power(struct device *dev, unsigned long *uW,
ret = dev_pm_opp_calc_power(dev, &power, &freq);