1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 3c430228d232..c6690a2a27fb 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -46,6 +46,8 @@ struct uart_ops {
         unsigned int    (*get_mctrl)(struct uart_port *);
         void            (*stop_tx)(struct uart_port *);
         void            (*start_tx)(struct uart_port *);
+        void            (*throttle)(struct uart_port *);
+        void            (*unthrottle)(struct uart_port *);
         void            (*send_xchar)(struct uart_port *, char ch);
         void            (*stop_rx)(struct uart_port *);
         void            (*enable_ms)(struct uart_port *);
@@ -163,6 +165,10 @@ struct uart_port {
 #define UPF_BUGGY_UART          ((__force upf_t) (1 << 14))
 #define UPF_NO_TXEN_TEST        ((__force upf_t) (1 << 15))
 #define UPF_MAGIC_MULTIPLIER    ((__force upf_t) (1 << 16))
+/* Port has hardware-assisted h/w flow control (iow, auto-RTS *not* auto-CTS) */
+#define UPF_HARD_FLOW           ((__force upf_t) (1 << 21))
+/* Port has hardware-assisted s/w flow control */
+#define UPF_SOFT_FLOW           ((__force upf_t) (1 << 22))
 #define UPF_CONS_FLOW           ((__force upf_t) (1 << 23))
 #define UPF_SHARE_IRQ           ((__force upf_t) (1 << 24))
 #define UPF_EXAR_EFR            ((__force upf_t) (1 << 25))