1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 9d2579230689..a3ac92b19aca 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -211,6 +211,7 @@ struct uart_port {
 #define UPIO_HUB6               (1)
 #define UPIO_MEM                (2)
 #define UPIO_MEM32              (3)
+#define UPIO_AU                 (4)                     /* Au1x00 type IO */
 
         unsigned int            read_status_mask;       /* driver specific */
         unsigned int            ignore_status_mask;     /* driver specific */