subsys_interface_register
ret = subsys_interface_register(&sq_interface);
EXPORT_SYMBOL_GPL(subsys_interface_register);
ret = subsys_interface_register(&cpufreq_interface);
return subsys_interface_register(&rionet_interface);
ret = subsys_interface_register(&riocm_interface);
int subsys_interface_register(struct subsys_interface *sif);