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82 lines
3.1 KiB
Plaintext
82 lines
3.1 KiB
Plaintext
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What: /sys/bus/wmi/devices/.../driver_override
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Date: February 2024
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Contact: Armin Wolf <W_Armin@gmx.de>
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Description:
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This file allows the driver for a device to be specified which
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will override standard ID table matching.
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When specified, only a driver with a name matching the value
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written to driver_override will have an opportunity to bind
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to the device.
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The override is specified by writing a string to the
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driver_override file (echo wmi-event-dummy > driver_override).
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The override may be cleared with an empty string (echo > \
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driver_override) which returns the device to standard matching
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rules binding.
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Writing to driver_override does not automatically unbind the
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device from its current driver or make any attempt to automatically
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load the specified driver. If no driver with a matching name is
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currently loaded in the kernel, the device will not bind to any
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driver.
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This also allows devices to opt-out of driver binding using a
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driver_override name such as "none". Only a single driver may be
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specified in the override, there is no support for parsing delimiters.
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What: /sys/bus/wmi/devices/.../modalias
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Date: November 20:15
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Contact: Andy Lutomirski <luto@kernel.org>
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Description:
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This file contains the MODALIAS value emitted by uevent for a
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given WMI device.
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Format: wmi:XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX.
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What: /sys/bus/wmi/devices/.../guid
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Date: November 2015
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Contact: Andy Lutomirski <luto@kernel.org>
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Description:
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This file contains the GUID used to match WMI devices to
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compatible WMI drivers. This GUID is not necessarily unique
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inside a given machine, it is solely used to identify the
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interface exposed by a given WMI device.
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What: /sys/bus/wmi/devices/.../object_id
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Date: November 2015
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Contact: Andy Lutomirski <luto@kernel.org>
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Description:
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This file contains the WMI object ID used internally to construct
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the ACPI method names used by non-event WMI devices. It contains
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two ASCII letters.
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What: /sys/bus/wmi/devices/.../notify_id
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Date: November 2015
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Contact: Andy Lutomirski <luto@kernel.org>
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Description:
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This file contains the WMI notify ID used internally to map ACPI
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events to WMI event devices. It contains two ASCII letters.
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What: /sys/bus/wmi/devices/.../instance_count
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Date: November 2015
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Contact: Andy Lutomirski <luto@kernel.org>
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Description:
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This file contains the number of WMI object instances being
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present on a given WMI device. It contains a non-negative
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number.
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What: /sys/bus/wmi/devices/.../expensive
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Date: November 2015
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Contact: Andy Lutomirski <luto@kernel.org>
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Description:
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This file contains a boolean flag signaling if interacting with
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the given WMI device will consume significant CPU resources.
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The WMI driver core will take care of enabling/disabling such
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WMI devices.
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What: /sys/bus/wmi/devices/.../setable
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Date: May 2017
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Contact: Darren Hart (VMware) <dvhart@infradead.org>
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Description:
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This file contains a boolean flags signaling the data block
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aassociated with the given WMI device is writable. If the
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given WMI device is not associated with a data block, then
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this file will not exist.
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