SPRD_LSR_FE
*lsr &= ~(SPRD_LSR_FE | SPRD_LSR_PE);
else if (*lsr & SPRD_LSR_FE)
else if (*lsr & SPRD_LSR_FE)
SPRD_LSR_FE | SPRD_LSR_OE))
port->read_status_mask |= SPRD_LSR_FE | SPRD_LSR_PE;
port->ignore_status_mask |= SPRD_LSR_PE | SPRD_LSR_FE;