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linux/Documentation/ABI/testing/sysfs-bus-usb-lvstest
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Signed-off-by: Pratyush Anand <pratyush.anand@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-06-25 17:00:38 -07:00

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Link Layer Validation Device is a standard device for testing of Super
Speed Link Layer tests. These nodes are available in sysfs only when lvs
driver is bound with root hub device.
What: /sys/bus/usb/devices/.../get_dev_desc
Date: March 2014
Contact: Pratyush Anand <pratyush.anand@gmail.com>
Description:
Write to this node to issue "Get Device Descriptor"
for Link Layer Validation device. It is needed for TD.7.06.
What: /sys/bus/usb/devices/.../u1_timeout
Date: March 2014
Contact: Pratyush Anand <pratyush.anand@gmail.com>
Description:
Set "U1 timeout" for the downstream port where Link Layer
Validation device is connected. Timeout value must be between 0
and 127. It is needed for TD.7.18, TD.7.19, TD.7.20 and TD.7.21.
What: /sys/bus/usb/devices/.../u2_timeout
Date: March 2014
Contact: Pratyush Anand <pratyush.anand@gmail.com>
Description:
Set "U2 timeout" for the downstream port where Link Layer
Validation device is connected. Timeout value must be between 0
and 127. It is needed for TD.7.18, TD.7.19, TD.7.20 and TD.7.21.
What: /sys/bus/usb/devices/.../hot_reset
Date: March 2014
Contact: Pratyush Anand <pratyush.anand@gmail.com>
Description:
Write to this node to issue "Reset" for Link Layer Validation
device. It is needed for TD.7.29, TD.7.31, TD.7.34 and TD.7.35.
What: /sys/bus/usb/devices/.../u3_entry
Date: March 2014
Contact: Pratyush Anand <pratyush.anand@gmail.com>
Description:
Write to this node to issue "U3 entry" for Link Layer
Validation device. It is needed for TD.7.35 and TD.7.36.
What: /sys/bus/usb/devices/.../u3_exit
Date: March 2014
Contact: Pratyush Anand <pratyush.anand@gmail.com>
Description:
Write to this node to issue "U3 exit" for Link Layer
Validation device. It is needed for TD.7.36.