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linux-imx/Documentation/ABI/testing/sysfs-devices-sun
Lv Zheng 89ca78a060 ACPI: Add sysfs ABI documentation 
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>
2013-06-21 00:13:15 +02:00

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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.