@@ -224,6 +224,11 @@ static int pl011_fifo_to_tty(struct uart_amba_port *uap)
uart_insert_char(&uap->port, ch, UART011_DR_OE, ch, flag);
}
+ /* RXIS but RXFE? Just clear the interrupt */
+ if(unlikely(fifotaken == 0))
+ writew(UART011_RTIS | UART011_RXIS,
+ uap->port.membase + UART011_ICR);
+
return fifotaken;
}
@@ -1381,6 +1386,10 @@ static int pl011_startup(struct uart_port *port)
uap->port.uartclk = clk_get_rate(uap->clk);
+ /* Clear pending error and receive interrupts */
+ writew(UART011_OEIS | UART011_BEIS | UART011_PEIS | UART011_FEIS |
+ UART011_RTIS | UART011_RXIS, uap->port.membase + UART011_ICR);
+
/*
* Allocate the IRQ
*/
@@ -1417,10 +1426,6 @@ static int pl011_startup(struct uart_port *port)
cr |= UART01x_CR_UARTEN | UART011_CR_RXE | UART011_CR_TXE;
writew(cr, uap->port.membase + UART011_CR);
- /* Clear pending error interrupts */
- writew(UART011_OEIS | UART011_BEIS | UART011_PEIS | UART011_FEIS,
- uap->port.membase + UART011_ICR);
-
/*
* initialise the old status of the modem signals
*/
@@ -1927,6 +1932,10 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id)
goto unmap;
}
+ /* Ensure interrupts from this UART are masked and cleared */
+ writew(0, uap->port.membase + UART011_IMSC);
+ writew(0xffff, uap->port.membase + UART011_ICR);
+
uap->vendor = vendor;
uap->lcrh_rx = vendor->lcrh_rx;
uap->lcrh_tx = vendor->lcrh_tx;