162306a36Sopenharmony_ciWhat: /sys/devices/.../sun 262306a36Sopenharmony_ciDate: October 2012 362306a36Sopenharmony_ciContact: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> 462306a36Sopenharmony_ciDescription: 562306a36Sopenharmony_ci The file contains a Slot-unique ID which provided by the _SUN 662306a36Sopenharmony_ci method in the ACPI namespace. The value is written in Advanced 762306a36Sopenharmony_ci Configuration and Power Interface Specification as follows: 862306a36Sopenharmony_ci 962306a36Sopenharmony_ci "The _SUN value is required to be unique among the slots of 1062306a36Sopenharmony_ci the same type. It is also recommended that this number match 1162306a36Sopenharmony_ci the slot number printed on the physical slot whenever possible." 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_ci So reading the sysfs file, we can identify a physical position 1462306a36Sopenharmony_ci of the slot in the system. 15