SPRD_LSR_OE
if (*lsr & SPRD_LSR_OE)
SPRD_LSR_FE | SPRD_LSR_OE))
uart_insert_char(port, lsr, SPRD_LSR_OE, ch, flag);
port->read_status_mask = SPRD_LSR_OE;
port->ignore_status_mask |= SPRD_LSR_OE;