hsi_dummy_cl
port->setup = hsi_dummy_cl;
port->flush = hsi_dummy_cl;
port->start_tx = hsi_dummy_cl;
port->stop_tx = hsi_dummy_cl;
port->release = hsi_dummy_cl;
port[i]->setup = hsi_dummy_cl;
port[i]->flush = hsi_dummy_cl;
port[i]->start_tx = hsi_dummy_cl;
port[i]->stop_tx = hsi_dummy_cl;
port[i]->release = hsi_dummy_cl;