diff options
Diffstat (limited to 'kernel/Documentation/ABI/testing/sysfs-bus-usb')
| -rw-r--r-- | kernel/Documentation/ABI/testing/sysfs-bus-usb | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/kernel/Documentation/ABI/testing/sysfs-bus-usb b/kernel/Documentation/ABI/testing/sysfs-bus-usb index e5cc7633d..136ba17d2 100644 --- a/kernel/Documentation/ABI/testing/sysfs-bus-usb +++ b/kernel/Documentation/ABI/testing/sysfs-bus-usb @@ -1,3 +1,23 @@ +What: /sys/bus/usb/devices/INTERFACE/authorized +Date: August 2015 +Description: + This allows to authorize (1) or deauthorize (0) + individual interfaces instead a whole device + in contrast to the device authorization. + If a deauthorized interface will be authorized + so the driver probing must be triggered manually + by writing INTERFACE to /sys/bus/usb/drivers_probe + This allows to avoid side-effects with drivers + that need multiple interfaces. + A deauthorized interface cannot be probed or claimed. + +What: /sys/bus/usb/devices/usbX/interface_authorized_default +Date: August 2015 +Description: + This is used as value that determines if interfaces + would be authorized by default. + The value can be 1 or 0. It's by default 1. + What: /sys/bus/usb/device/.../authorized Date: July 2008 KernelVersion: 2.6.26 @@ -114,6 +134,22 @@ Description: enabled for the device. Developer can write y/Y/1 or n/N/0 to the file to enable/disable the feature. +What: /sys/bus/usb/devices/.../power/usb3_hardware_lpm_u1 + /sys/bus/usb/devices/.../power/usb3_hardware_lpm_u2 +Date: November 2015 +Contact: Kevin Strasser <kevin.strasser@linux.intel.com> + Lu Baolu <baolu.lu@linux.intel.com> +Description: + If CONFIG_PM is set and a USB 3.0 lpm-capable device is plugged + in to a xHCI host which supports link PM, it will check if U1 + and U2 exit latencies have been set in the BOS descriptor; if + the check is passed and the host supports USB3 hardware LPM, + USB3 hardware LPM will be enabled for the device and the USB + device directory will contain two files named + power/usb3_hardware_lpm_u1 and power/usb3_hardware_lpm_u2. These + files hold a string value (enable or disable) indicating whether + or not USB3 hardware LPM U1 or U2 is enabled for the device. + What: /sys/bus/usb/devices/.../removable Date: February 2012 Contact: Matthew Garrett <mjg@redhat.com> |