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diff --git a/Documentation/ABI/testing/sysfs-class-extcon b/Documentation/ABI/testing/sysfs-class-extcon
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+What:           /sys/class/extcon/.../
+Date:           December 2011
+Contact:        MyungJoo Ham <myungjoo.ham@samsung.com>
+Description:
+                Provide a place in sysfs for the extcon objects.
+                This allows accessing extcon specific variables.
+                The name of extcon object denoted as ... is the name given
+                with extcon_dev_register.
+
+What:           /sys/class/extcon/.../name
+Date:           December 2011
+Contact:        MyungJoo Ham <myungjoo.ham@samsung.com>
+Description:
+                The /sys/class/extcon/.../name shows the name of the extcon
+                object. If the extcon object has an optional callback
+                "show_name" defined, the callback will provide the name with
+                this sysfs node.
+
+What:           /sys/class/extcon/.../state
+Date:           December 2011
+Contact:        MyungJoo Ham <myungjoo.ham@samsung.com>
+Description:
+                The /sys/class/extcon/.../state shows the cable attach/detach
+                information of the corresponding extcon object. If the extcon
+                objecct has an optional callback "show_state" defined, the
+                callback will provide the name with this sysfs node.