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>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/tty/serial/bfin_uart.c b/drivers/tty/serial/bfin_uart.c
index ff5a1dc43e08..f24f8a2073d9 100644
--- a/drivers/tty/serial/bfin_uart.c
+++ b/drivers/tty/serial/bfin_uart.c
@@ -1377,8 +1377,10 @@ static int bfin_serial_probe(struct platform_device *pdev)
                 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)