1 files changed, 7 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-bus-usb b/Documentation/ABI/testing/sysfs-bus-usb
index 5f75f8f7df3..b6fbe514a86 100644
--- a/Documentation/ABI/testing/sysfs-bus-usb
+++ b/Documentation/ABI/testing/sysfs-bus-usb
@@ -220,3 +220,10 @@ Description:
                 If the device doesn't support LTM, the file will read "no".
                 The file will be present for all speeds of USB devices, and will
                 always read "no" for USB 1.1 and USB 2.0 devices.
+
+What:           /sys/bus/usb/devices/.../(hub interface)/portX
+Date:           August 2012
+Contact:        Lan Tianyu <tianyu.lan@intel.com>
+Description:
+                The /sys/bus/usb/devices/.../(hub interface)/portX
+                is usb port device's sysfs directory.