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path: root/drivers/tty/serial/xilinx_uartps.c
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Diffstat (limited to 'drivers/tty/serial/xilinx_uartps.c')
-rw-r--r--drivers/tty/serial/xilinx_uartps.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index 35e9e8faf8de..b9d672af8b65 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -1235,9 +1235,7 @@ static void cdns_uart_console_write(struct console *co, const char *s,
writel(ctrl, port->membase + CDNS_UART_CR);
uart_console_write(port, s, count, cdns_uart_console_putchar);
- while ((readl(port->membase + CDNS_UART_SR) &
- (CDNS_UART_SR_TXEMPTY | CDNS_UART_SR_TACTIVE)) !=
- CDNS_UART_SR_TXEMPTY)
+ while (cdns_uart_tx_empty(port) != TIOCSER_TEMT)
cpu_relax();
/* restore interrupt state */
@@ -1262,6 +1260,7 @@ static int cdns_uart_console_setup(struct console *co, char *options)
int bits = 8;
int parity = 'n';
int flow = 'n';
+ unsigned long time_out;
if (!port->membase) {
pr_debug("console on " CDNS_UART_TTY_NAME "%i not present\n",
@@ -1272,6 +1271,13 @@ static int cdns_uart_console_setup(struct console *co, char *options)
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
+ /* Wait for tx_empty before setting up the console */
+ time_out = jiffies + usecs_to_jiffies(TX_TIMEOUT);
+
+ while (time_before(jiffies, time_out) &&
+ cdns_uart_tx_empty(port) != TIOCSER_TEMT)
+ cpu_relax();
+
return uart_set_options(port, co, baud, parity, bits, flow);
}