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bf4f93c4ca
Add a place for device-specific documentation of WMI drivers. The first entry is documentation for the wmi-bmof driver, with additional documentation being expected to follow. Signed-off-by: Armin Wolf <W_Armin@gmx.de> Tested-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Link: https://lore.kernel.org/r/20230424222939.208137-5-W_Armin@gmx.de Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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931 B
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26 lines
931 B
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.. SPDX-License-Identifier: GPL-2.0-only
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==============================
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WMI embedded Binary MOF driver
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==============================
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Introduction
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============
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Many machines embed WMI Binary MOF (Managed Object Format) metadata used to
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describe the details of their ACPI WMI interfaces. The data can be decoded
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with tools like `bmfdec <https://github.com/pali/bmfdec>`_ to obtain a
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human readable WMI interface description, which is useful for developing
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new WMI drivers.
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The Binary MOF data can be retrieved from the ``bmof`` sysfs attribute of the
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associated WMI device. Please note that multiple WMI devices containing Binary
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MOF data can exist on a given system.
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WMI interface
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=============
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The Binary MOF WMI device is identified by the WMI GUID ``05901221-D566-11D1-B2F0-00A0C9062910``.
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The Binary MOF can be obtained by doing a WMI data block query. The result is
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then returned as an ACPI buffer with a variable size.
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