X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=Documentation%2FABI%2Ftesting%2Fsysfs-bus-usb;h=7772928ee48f6edfa61d52921164ed106501515b;hb=36ec891895020f3bc9953c8b11d079c6d77d76bd;hp=9734577d171154630f49be83779863ef875d6b7e;hpb=dcb76f88683618ed6ef0df66643dba1285881ee5;p=linux-2.6-omap-h63xx.git

diff --git a/Documentation/ABI/testing/sysfs-bus-usb b/Documentation/ABI/testing/sysfs-bus-usb
index 9734577d171..7772928ee48 100644
--- 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).