SUP_UART_LSR_PE
lsr &= ~(SUP_UART_LSR_FE | SUP_UART_LSR_PE);
} else if (lsr & SUP_UART_LSR_PE) {
port->read_status_mask |= SUP_UART_LSR_PE | SUP_UART_LSR_FE;
port->ignore_status_mask |= SUP_UART_LSR_FE | SUP_UART_LSR_PE;