Merge branch 'master' into for-upstream

[safe/jmp/linux-2.6] / Documentation / ABI / testing / sysfs-bus-usb

diff --git a/Documentation/ABI/testing/sysfs-bus-usb b/Documentation/ABI/testing/sysfs-bus-usb
index 9734577..7772928 100644 (file)
--- a/Documentation/ABI/testing/sysfs-bus-usb
+++ b/Documentation/ABI/testing/sysfs-bus-usb
@@ -52,3 +52,95 @@ Description:
                facility is inherently dangerous, it is disabled by default
                for all devices except hubs.  For more information, see
                Documentation/usb/persist.txt.
+
+What:          /sys/bus/usb/device/.../power/connected_duration
+Date:          January 2008
+KernelVersion: 2.6.25
+Contact:       Sarah Sharp <sarah.a.sharp@intel.com>
+Description:
+               If CONFIG_PM and CONFIG_USB_SUSPEND are enabled, then this file
+               is present.  When read, it returns the total time (in msec)
+               that the USB device has been connected to the machine.  This
+               file is read-only.
+Users:
+               PowerTOP <power@bughost.org>
+               http://www.lesswatts.org/projects/powertop/
+
+What:          /sys/bus/usb/device/.../power/active_duration
+Date:          January 2008
+KernelVersion: 2.6.25
+Contact:       Sarah Sharp <sarah.a.sharp@intel.com>
+Description:
+               If CONFIG_PM and CONFIG_USB_SUSPEND are enabled, then this file
+               is present.  When read, it returns the total time (in msec)
+               that the USB device has been active, i.e. not in a suspended
+               state.  This file is read-only.
+
+               Tools can use this file and the connected_duration file to
+               compute the percentage of time that a device has been active.
+               For example,
+               echo $((100 * `cat active_duration` / `cat connected_duration`))
+               will give an integer percentage.  Note that this does not
+               account for counter wrap.
+Users:
+               PowerTOP <power@bughost.org>
+               http://www.lesswatts.org/projects/powertop/
+
+What:          /sys/bus/usb/device/<busnum>-<devnum>...:<config num>-<interface num>/supports_autosuspend
+Date:          January 2008
+KernelVersion: 2.6.27
+Contact:       Sarah Sharp <sarah.a.sharp@intel.com>
+Description:
+               When read, this file returns 1 if the interface driver
+               for this interface supports autosuspend.  It also
+               returns 1 if no driver has claimed this interface, as an
+               unclaimed interface will not stop the device from being
+               autosuspended if all other interface drivers are idle.
+               The file returns 0 if autosuspend support has not been
+               added to the driver.
+Users:
+               USB PM tool
+               git://git.moblin.org/users/sarah/usb-pm-tool/
+
+What:          /sys/bus/usb/device/.../authorized
+Date:          July 2008
+KernelVersion: 2.6.26
+Contact:       David Vrabel <david.vrabel@csr.com>
+Description:
+               Authorized devices are available for use by device
+               drivers, non-authorized one are not.  By default, wired
+               USB devices are authorized.
+
+               Certified Wireless USB devices are not authorized
+               initially and should be (by writing 1) after the
+               device has been authenticated.
+
+What:          /sys/bus/usb/device/.../wusb_cdid
+Date:          July 2008
+KernelVersion: 2.6.27
+Contact:       David Vrabel <david.vrabel@csr.com>
+Description:
+               For Certified Wireless USB devices only.
+
+               A devices's CDID, as 16 space-separated hex octets.
+
+What:          /sys/bus/usb/device/.../wusb_ck
+Date:          July 2008
+KernelVersion: 2.6.27
+Contact:       David Vrabel <david.vrabel@csr.com>
+Description:
+               For Certified Wireless USB devices only.
+
+               Write the device's connection key (CK) to start the
+               authentication of the device.  The CK is 16
+               space-separated hex octets.
+
+What:          /sys/bus/usb/device/.../wusb_disconnect
+Date:          July 2008
+KernelVersion: 2.6.27
+Contact:       David Vrabel <david.vrabel@csr.com>
+Description:
+               For Certified Wireless USB devices only.
+
+               Write a 1 to force the device to disconnect
+               (equivalent to unplugging a wired USB device).