89ca78a060
Add initial ABI documentation for ACPI devices' sysfs interfaces. Contacts information fields are filled with current ACPI maintainer and the relevant authors are carbon copied. [rjw: Use my e-mail address that's likely to be valid longer.] Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
15 lines
600 B
Plaintext
15 lines
600 B
Plaintext
What: /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.
|