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cadence_uart: Check if receiver timeout counter is disabled 

When register Rcvr_timeout_reg0 (R_RTOR in cadence_uart.c) is set to
0, the receiver timeout counter should be disabled. See page 1801 of
"Zynq-7000 AP SoC Technical Reference Manual". This commit adds a
such a check before setting the receive timeout interrupt.

Signed-off-by: Andrew Gacek <andrew.gacek@gmail.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Andrew Gacek 2016-12-27 14:59:23 +00:00 committed by Peter Maydell
parent 450aaae863
commit 2494c9f640
1 changed files with 4 additions and 3 deletions
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7
hw/char/cadence_uart.c
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@ -138,9 +138,10 @@ static void fifo_trigger_update(void *opaque)
{
CadenceUARTState *s = opaque;
s->r[R_CISR] |= UART_INTR_TIMEOUT;
uart_update_status(s);
if (s->r[R_RTOR]) {
s->r[R_CISR] |= UART_INTR_TIMEOUT;
uart_update_status(s);
}
}
static void uart_rx_reset(CadenceUARTState *s)