SCxSR_RDxF_CLEAR
s->ops->clear_SCxSR(port, SCxSR_RDxF_CLEAR(port));
s->ops->clear_SCxSR(port, SCxSR_RDxF_CLEAR(port));
s->ops->clear_SCxSR(port, SCxSR_RDxF_CLEAR(port));
SCxSR_RDxF_CLEAR(port) & SCxSR_ERROR_CLEAR(port) &
s->ops->clear_SCxSR(port, SCxSR_RDxF_CLEAR(port));