0001 What: /sys/bus/acpi/devices/.../path
0002 Date: December 2006
0003 Contact: Rafael J. Wysocki <rjw@rjwysocki.net>
0004 Description:
0005 This attribute indicates the full path of ACPI namespace
0006 object associated with the device object. For example,
0007 \_SB_.PCI0.
0008
0009 This file is not present for device objects representing
0010 fixed ACPI hardware features (like power and sleep
0011 buttons).
0012
0013 What: /sys/bus/acpi/devices/.../modalias
0014 Date: July 2007
0015 Contact: Rafael J. Wysocki <rjw@rjwysocki.net>
0016 Description:
0017 This attribute indicates the PNP IDs of the device object.
0018 That is acpi:HHHHHHHH:[CCCCCCC:]. Where each HHHHHHHH or
0019 CCCCCCCC contains device object's PNPID (_HID or _CID).
0020
0021 What: /sys/bus/acpi/devices/.../hid
0022 Date: April 2005
0023 Contact: Rafael J. Wysocki <rjw@rjwysocki.net>
0024 Description:
0025 This attribute indicates the hardware ID (_HID) of the
0026 device object. For example, PNP0103.
0027 This file is present for device objects having the _HID
0028 control method.
0029
0030 What: /sys/bus/acpi/devices/.../description
0031 Date: October 2012
0032 Contact: Rafael J. Wysocki <rjw@rjwysocki.net>
0033 Description:
0034 This attribute contains the output of the device object's
0035 _STR control method, if present.
0036
0037 What: /sys/bus/acpi/devices/.../adr
0038 Date: October 2012
0039 Contact: Rafael J. Wysocki <rjw@rjwysocki.net>
0040 Description:
0041 This attribute contains the output of the device object's
0042 _ADR control method, which is present for ACPI device
0043 objects representing devices having standard enumeration
0044 algorithms, such as PCI.
0045
0046 What: /sys/bus/acpi/devices/.../uid
0047 Date: October 2012
0048 Contact: Rafael J. Wysocki <rjw@rjwysocki.net>
0049 Description:
0050 This attribute contains the output of the device object's
0051 _UID control method, if present.
0052
0053 What: /sys/bus/acpi/devices/.../eject
0054 Date: December 2006
0055 Contact: Rafael J. Wysocki <rjw@rjwysocki.net>
0056 Description:
0057 Writing 1 to this attribute will trigger hot removal of
0058 this device object. This file exists for every device
0059 object that has _EJ0 method.
0060
0061 What: /sys/bus/acpi/devices/.../status
0062 Date: Jan, 2014
0063 Contact: Rafael J. Wysocki <rjw@rjwysocki.net>
0064 Description:
0065 (RO) Returns the ACPI device status: enabled, disabled or
0066 functioning or present, if the method _STA is present.
0067
0068 The return value is a decimal integer representing the device's
0069 status bitmap:
0070
0071 =========== ==================================================
0072 Bit [0] Set if the device is present.
0073 Bit [1] Set if the device is enabled and decoding its
0074 resources.
0075 Bit [2] Set if the device should be shown in the UI.
0076 Bit [3] Set if the device is functioning properly (cleared
0077 if device failed its diagnostics).
0078 Bit [4] Set if the battery is present.
0079 Bits [31:5] Reserved (must be cleared)
0080 =========== ==================================================
0081
0082 If bit [0] is clear, then bit 1 must also be clear (a device
0083 that is not present cannot be enabled).
0084
0085 Bit 0 can be clear (not present) with bit [3] set (device is
0086 functional). This case is used to indicate a valid device for
0087 which no device driver should be loaded.
0088
0089 More special cases are covered in the ACPI specification.
0090
0091 What: /sys/bus/acpi/devices/.../hrv
0092 Date: Apr, 2016
0093 Contact: Rafael J. Wysocki <rjw@rjwysocki.net>
0094 Description:
0095 (RO) Allows users to read the hardware version of non-PCI
0096 hardware, if the _HRV control method is present. It is mostly
0097 useful for non-PCI devices because lspci can list the hardware
0098 version for PCI devices.
