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usb: Add "portX/connect_type" attribute to expose usb port's connect type

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Some platforms provide usb port connect types through ACPI. This
patch is to add this new attribute to expose these information
to user space.

Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lan Tianyu
2013-01-20 01:53:32 +08:00
committed by Greg Kroah-Hartman
parent 9f7344fbaf
commit cef7468caf
2 changed files with 52 additions and 0 deletions
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9
Documentation/ABI/testing/sysfs-bus-usb
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@@ -227,3 +227,12 @@ Contact: Lan Tianyu <tianyu.lan@intel.com>
Description:
The /sys/bus/usb/devices/.../(hub interface)/portX
is usb port device's sysfs directory.
What: /sys/bus/usb/devices/.../(hub interface)/portX/connect_type
Date: January 2013
Contact: Lan Tianyu <tianyu.lan@intel.com>
Description:
Some platforms provide usb port connect types through ACPI.
This attribute is to expose these information to user space.
The file will read "hotplug", "wired" and "not used" if the
information is available, and "unknown" otherwise.