serial: bfin-uart: Add tty ASYNC_CTS_FLOW flag to do CTS flow control.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/tty/serial/bfin_uart.c b/drivers/tty/serial/bfin_uart.c
index ff5a1dc..f24f8a2 100644
--- a/drivers/tty/serial/bfin_uart.c
+++ b/drivers/tty/serial/bfin_uart.c
@@ -1377,8 +1377,10 @@
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (res == NULL)
uart->cts_pin = -1;
- else
+ else {
uart->cts_pin = res->start;
+ uart->port.flags |= ASYNC_CTS_FLOW;
+ }
res = platform_get_resource(pdev, IORESOURCE_IO, 1);
if (res == NULL)
