1 files changed, 12 insertions, 0 deletions

diff --git a/include/linux/usb/ch9.h b/include/linux/usb/ch9.h
index 1ded281eff88..f32a64e57f97 100644
--- a/include/linux/usb/ch9.h
+++ b/include/linux/usb/ch9.h
@@ -868,6 +868,18 @@ enum usb_device_speed {
         USB_SPEED_SUPER,                        /* usb 3.0 */
 };
 
+#ifdef __KERNEL__
+
+/**
+ * usb_speed_string() - Returns human readable-name of the speed.
+ * @speed: The speed to return human-readable name for.  If it's not
+ *   any of the speeds defined in usb_device_speed enum, string for
+ *   USB_SPEED_UNKNOWN will be returned.
+ */
+extern const char *usb_speed_string(enum usb_device_speed speed);
+
+#endif
+
 enum usb_device_state {
         /* NOTATTACHED isn't in the USB spec, and this state acts
          * the same as ATTACHED ... but it's clearer this way.