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Diffstat (limited to 'Documentation/ABI/testing')
-rw-r--r-- | Documentation/ABI/testing/sysfs-devices-sun | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-sun b/Documentation/ABI/testing/sysfs-devices-sun new file mode 100644 index 000000000000..86be9848a77e --- /dev/null +++ b/Documentation/ABI/testing/sysfs-devices-sun | |||
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1 | Whatt: /sys/devices/.../sun | ||
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. | ||