MCTRL_MASK
if (s->pdata.mctrl_cfg[port->line] & MCTRL_MASK(sig)) {
if (s->pdata.mctrl_cfg[port->line] & MCTRL_MASK(DSR_IP)) {
if (s->pdata.mctrl_cfg[port->line] & MCTRL_MASK(CTS_IP)) {
if (s->pdata.mctrl_cfg[port->line] & MCTRL_MASK(DCD_IP)) {
if (s->pdata.mctrl_cfg[port->line] & MCTRL_MASK(RNG_IP)) {