do_service_request
ret = do_service_request(cpu, FREQ_INFO_TYPE_FREQ, CMD_GET_FREQ_INFO, 0, 0);
ret = do_service_request(cpu_data[policy->cpu].core,
ret = do_service_request(cpu, 0, CMD_GET_FREQ_LEVEL_NUM, 0, 0);
ret = do_service_request(cpu, 0, CMD_GET_FREQ_BOOST_LEVEL, 0, 0);
ret = do_service_request(cpu, FREQ_INFO_TYPE_FREQ, CMD_GET_FREQ_LEVEL_INFO, i, 0);
ret = do_service_request(0, 0, CMD_GET_VERSION, 0, 0);
ret = do_service_request(FEATURE_DVFS, 0, CMD_SET_FEATURE,