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