Merge branch 'remotes/lorenzo/pci/tegra194'
[linux-2.6-microblaze.git] / Documentation / ABI / testing / configfs-acpi
1 What:           /config/acpi
2 Date:           July 2016
3 KernelVersion:  4.8
4 Contact:        linux-acpi@vger.kernel.org
5 Description:
6                 This represents the ACPI subsystem entry point directory. It
7                 contains sub-groups corresponding to ACPI configurable options.
8
9 What:           /config/acpi/table
10 Date:           July 2016
11 KernelVersion:  4.8
12 Description:
13
14                 This group contains the configuration for user defined ACPI
15                 tables. The attributes of a user define table are:
16
17                 aml
18                               - a binary attribute that the user can use to
19                                 fill in the ACPI aml definitions. Once the aml
20                                 data is written to this file and the file is
21                                 closed the table will be loaded and ACPI devices
22                                 will be enumerated. To check if the operation is
23                                 successful the user must check the error code
24                                 for close(). If the operation is successful,
25                                 subsequent writes to this attribute will fail.
26
27                 The rest of the attributes are read-only and are valid only
28                 after the table has been loaded by filling the aml entry:
29
30                 signature
31                                 - ASCII table signature
32
33                 length
34                                 - length of table in bytes, including the header
35
36                 revision
37                                 - ACPI Specification minor version number
38
39                 oem_id
40                                 - ASCII OEM identification
41
42                 oem_table_id
43                                 - ASCII OEM table identification
44
45                 oem_revision
46                                 - OEM revision number
47
48                 asl_compiler_id
49                                 - ASCII ASL compiler vendor ID
50
51                 asl_compiler_revision
52                                 - ASL compiler version