Documentation sysfs-bus-usb: Document the speed file used by libusb
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/Documentation/ABI/stable/sysfs-bus-usb b/Documentation/ABI/stable/sysfs-bus-usb
index 6b59aea..a596414 100644
--- a/Documentation/ABI/stable/sysfs-bus-usb
+++ b/Documentation/ABI/stable/sysfs-bus-usb
@@ -124,3 +124,9 @@
can be trusted, and can be used to seek forward one (sub)
descriptor at a time until the next config descriptor is found.
All descriptors read from this file are in bus-endian format
+
+What: /sys/bus/usb/devices/.../speed
+KernelVersion: since at least 2.6.18
+Description:
+ Speed the device is connected with to the usb-host in
+ Mbit / second. IE one of 1.5 / 12 / 480 / 5000.