1 What: /sys/bus/acpi/devices/.../path
3 Contact: Rafael J. Wysocki <rjw@rjwysocki.net>
5 This attribute indicates the full path of ACPI namespace
6 object associated with the device object. For example,
9 This file is not present for device objects representing
10 fixed ACPI hardware features (like power and sleep
13 What: /sys/bus/acpi/devices/.../modalias
15 Contact: Rafael J. Wysocki <rjw@rjwysocki.net>
17 This attribute indicates the PNP IDs of the device object.
18 That is acpi:HHHHHHHH:[CCCCCCC:]. Where each HHHHHHHH or
19 CCCCCCCC contains device object's PNPID (_HID or _CID).
21 What: /sys/bus/acpi/devices/.../hid
23 Contact: Rafael J. Wysocki <rjw@rjwysocki.net>
25 This attribute indicates the hardware ID (_HID) of the
26 device object. For example, PNP0103.
27 This file is present for device objects having the _HID
30 What: /sys/bus/acpi/devices/.../description
32 Contact: Rafael J. Wysocki <rjw@rjwysocki.net>
34 This attribute contains the output of the device object's
35 _STR control method, if present.
37 What: /sys/bus/acpi/devices/.../adr
39 Contact: Rafael J. Wysocki <rjw@rjwysocki.net>
41 This attribute contains the output of the device object's
42 _ADR control method, which is present for ACPI device
43 objects representing devices having standard enumeration
44 algorithms, such as PCI.
46 What: /sys/bus/acpi/devices/.../uid
48 Contact: Rafael J. Wysocki <rjw@rjwysocki.net>
50 This attribute contains the output of the device object's
51 _UID control method, if present.
53 What: /sys/bus/acpi/devices/.../eject
55 Contact: Rafael J. Wysocki <rjw@rjwysocki.net>
57 Writing 1 to this attribute will trigger hot removal of
58 this device object. This file exists for every device
59 object that has _EJ0 method.
61 What: /sys/bus/acpi/devices/.../status
63 Contact: Rafael J. Wysocki <rjw@rjwysocki.net>
65 (RO) Returns the ACPI device status: enabled, disabled or
66 functioning or present, if the method _STA is present.
68 The return value is a decimal integer representing the device's
71 =========== ==================================================
72 Bit [0] Set if the device is present.
73 Bit [1] Set if the device is enabled and decoding its
75 Bit [2] Set if the device should be shown in the UI.
76 Bit [3] Set if the device is functioning properly (cleared
77 if device failed its diagnostics).
78 Bit [4] Set if the battery is present.
79 Bits [31:5] Reserved (must be cleared)
80 =========== ==================================================
82 If bit [0] is clear, then bit 1 must also be clear (a device
83 that is not present cannot be enabled).
85 Bit 0 can be clear (not present) with bit [3] set (device is
86 functional). This case is used to indicate a valid device for
87 which no device driver should be loaded.
89 More special cases are covered in the ACPI specification.
91 What: /sys/bus/acpi/devices/.../hrv
93 Contact: Rafael J. Wysocki <rjw@rjwysocki.net>
95 (RO) Allows users to read the hardware version of non-PCI
96 hardware, if the _HRV control method is present. It is mostly
97 useful for non-PCI devices because lspci can list the hardware
98 version for PCI devices.