| Lv Zheng | 89ca78a | 2013-06-20 08:02:44 +0800 | [diff] [blame] | 1 | What: /sys/devices/.../sun |
| Yasuaki Ishimatsu | bb74ac2 | 2012-11-16 02:56:59 +0100 | [diff] [blame] | 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. |