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-rw-r--r--Documentation/ABI/testing/sysfs-bus-usb10
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-usb b/Documentation/ABI/testing/sysfs-bus-usb
index 0bd731cbb50c..c702c78f24d8 100644
--- a/Documentation/ABI/testing/sysfs-bus-usb
+++ b/Documentation/ABI/testing/sysfs-bus-usb
@@ -189,6 +189,16 @@ Description:
The file will read "hotplug", "wired" and "not used" if the
information is available, and "unknown" otherwise.
+What: /sys/bus/usb/devices/.../(hub interface)/portX/over_current_count
+Date: February 2018
+Contact: Richard Leitner <richard.leitner@skidata.com>
+Description:
+ Most hubs are able to detect over-current situations on their
+ ports and report them to the kernel. This attribute is to expose
+ the number of over-current situation occurred on a specific port
+ to user space. This file will contain an unsigned 32 bit value
+ which wraps to 0 after its maximum is reached.
+
What: /sys/bus/usb/devices/.../(hub interface)/portX/usb3_lpm_permit
Date: November 2015
Contact: Lu Baolu <baolu.lu@linux.intel.com>