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Diffstat (limited to 'kernel/Documentation/ABI/testing/sysfs-devices-sun')
| -rw-r--r-- | kernel/Documentation/ABI/testing/sysfs-devices-sun | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/kernel/Documentation/ABI/testing/sysfs-devices-sun b/kernel/Documentation/ABI/testing/sysfs-devices-sun new file mode 100644 index 000000000..625ce4b63 --- /dev/null +++ b/kernel/Documentation/ABI/testing/sysfs-devices-sun @@ -0,0 +1,14 @@ +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. |