serial: of_serial: Handle auto-flow-control property

Automatic Flow Control capability is not tied to this
property. This is only one way of detecting it. The property
is limited to be used only with 8250 driver.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 10 insertions, 3 deletions

diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
index 267711b5cb4d..39c7ea4cb14f 100644
--- a/drivers/tty/serial/of_serial.c
+++ b/drivers/tty/serial/of_serial.c
@@ -14,7 +14,6 @@
 #include <linux/slab.h>
 #include <linux/delay.h>
 #include <linux/serial_core.h>
-#include <linux/serial_8250.h>
 #include <linux/serial_reg.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
@@ -22,6 +21,8 @@
 #include <linux/nwpserial.h>
 #include <linux/clk.h>
 
+#include "8250/8250.h"
+
 struct of_serial_info {
         struct clk *clk;
         int type;
@@ -171,11 +172,17 @@ static int of_platform_serial_probe(struct platform_device *ofdev)
 #ifdef CONFIG_SERIAL_8250
         case PORT_8250 ... PORT_MAX_8250:
         {
-                /* For now the of bindings don't support the extra
-                   8250 specific bits */
                 struct uart_8250_port port8250;
                 memset(&port8250, 0, sizeof(port8250));
                 port8250.port = port;
+
+                if (port.fifosize)
+                        port8250.capabilities = UART_CAP_FIFO;
+
+                if (of_property_read_bool(ofdev->dev.of_node,
+                                          "auto-flow-control"))
+                        port8250.capabilities |= UART_CAP_AFE;
+
                 ret = serial8250_register_8250_port(&port8250);
                 break;
         }