0001 What: /sys/devices/.../sun
0002 Date: October 2012
0003 Contact: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
0004 Description:
0005 The file contains a Slot-unique ID which provided by the _SUN
0006 method in the ACPI namespace. The value is written in Advanced
0007 Configuration and Power Interface Specification as follows:
0008
0009 "The _SUN value is required to be unique among the slots of
0010 the same type. It is also recommended that this number match
0011 the slot number printed on the physical slot whenever possible."
0012
0013 So reading the sysfs file, we can identify a physical position
0014 of the slot in the system.
