Merge tag 'for-usb-next-2012-07-11' of git://git.kernel.org/pub/scm/linux/kernel/git/sarah/xhci into usb-next

USB: Link PM fixes and Latency Tolerance Messaging

Hi Greg,

Here's four bug fix patches for Link PM (LPM), which are marked for
3.5-stable.  There's also three patches that turn on Latency Tolerance
Messaging (LTM) for xHCI host controllers and USB 3.0 devices that support
this low power feature.

Please queue for 3.6.

Sarah Sharp

1 files changed, 12 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-bus-usb b/Documentation/ABI/testing/sysfs-bus-usb
index 6df4e6f57560..5f75f8f7df34 100644
--- a/Documentation/ABI/testing/sysfs-bus-usb
+++ b/Documentation/ABI/testing/sysfs-bus-usb
@@ -208,3 +208,15 @@ Description:
                 such as ACPI. This file will read either "removable" or
                 "fixed" if the information is available, and "unknown"
                 otherwise.
+
+What:           /sys/bus/usb/devices/.../ltm_capable
+Date:           July 2012
+Contact:        Sarah Sharp <sarah.a.sharp@linux.intel.com>
+Description:
+                USB 3.0 devices may optionally support Latency Tolerance
+                Messaging (LTM).  They indicate their support by setting a bit
+                in the bmAttributes field of their SuperSpeed BOS descriptors.
+                If that bit is set for the device, ltm_capable will read "yes".
+                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.