| 1 | Whatt: /sys/devices/.../sun |
| 2 | Date: October 2012 |
| 3 | Contact: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> |
| 4 | Description: |
| 5 | The file contains a Slot-unique ID which provided by the _SUN |
| 6 | method in the ACPI namespace. The value is written in Advanced |
| 7 | Configuration and Power Interface Specification as follows: |
| 8 | |
| 9 | "The _SUN value is required to be unique among the slots of |
| 10 | the same type. It is also recommended that this number match |
| 11 | the slot number printed on the physical slot whenever possible." |
| 12 | |
| 13 | So reading the sysfs file, we can identify a physical position |
| 14 | of the slot in the system. |