1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/usb/core/hub.h b/drivers/usb/core/hub.h
index 53bf5649621e..e7fa9b5a521e 100644
--- a/drivers/usb/core/hub.h
+++ b/drivers/usb/core/hub.h
@@ -157,6 +157,12 @@ enum hub_led_mode {
 
 struct usb_device;
 
+/* Transaction Translator Think Times, in bits */
+#define HUB_TTTT_8_BITS         0x00
+#define HUB_TTTT_16_BITS        0x20
+#define HUB_TTTT_24_BITS        0x40
+#define HUB_TTTT_32_BITS        0x60
+
 /*
  * As of USB 2.0, full/low speed devices are segregated into trees.
  * One type grows from USB 1.1 host controllers (OHCI, UHCI etc).
@@ -170,6 +176,7 @@ struct usb_device;
 struct usb_tt {
         struct usb_device       *hub;   /* upstream highspeed hub */
         int                     multi;  /* true means one TT per port */
+        unsigned                think_time;     /* think time in ns */
 
         /* for control/bulk error recovery (CLEAR_TT_BUFFER) */
         spinlock_t              lock;