diff options
Diffstat (limited to '')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-usb | 12 | ||||
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-usb-devices-usbsevseg | 2 |
2 files changed, 13 insertions, 1 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. diff --git a/Documentation/ABI/testing/sysfs-bus-usb-devices-usbsevseg b/Documentation/ABI/testing/sysfs-bus-usb-devices-usbsevseg index cb830df8777c..70d00dfa443d 100644 --- a/Documentation/ABI/testing/sysfs-bus-usb-devices-usbsevseg +++ b/Documentation/ABI/testing/sysfs-bus-usb-devices-usbsevseg @@ -40,4 +40,4 @@ Description: Controls the decimal places on the device. the value of 10 ** n. Assume this field has the value k and has 1 or more decimal places set, to set the mth place (where m is not already set), - change this fields value to k + 10 ** m.
\ No newline at end of file + change this fields value to k + 10 ** m. |