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3 Commits

Author SHA1 Message Date
Hridesh MG
98e45f0d7b docs: platform/x86: wmi: mention tool for invoking WMI methods 
Add a reference to WMIExplorer, a tool useful for inspecting and
invoking WMI methods on Windows. This can assist developers in testing
and understanding WMI device functionality when porting drivers to
Linux.

Signed-off-by: Hridesh MG <hridesh699@gmail.com>
Reviewed-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20250101092730.87160-1-hridesh699@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
 2025-01-09 13:38:39 +02:00
Armin Wolf
d12586e107 platform/x86: wmi: Implement proper shutdown handling 
When performing a system shutdown under Windows, all WMI clients are
terminated. This means that the ACPI BIOS might expect all WMI devices
to be disabled when shutting down.

Emulate this behaviour by disabling all active WMI devices during
shutdown. Also introduce a new WMI driver callback to allow WMI drivers
to perform any device-specific actions before disabling the WMI device.

Tested on a Dell Inspiron 3505.

Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20241005213825.701887-2-W_Armin@gmx.de
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
 2024-10-09 12:04:48 +03:00
Armin Wolf
a582a43e0d platform/x86: wmi: Add driver development guide 
Since 2010, an LWN article covering WMI drivers exists:

	https://lwn.net/Articles/391230/

Since the introduction of the modern bus-based interface
and other userspace tooling (bmfdec, lswmi, ...), this
article is outdated and causes people to still submit new
WMI drivers using the deprecated GUID-based interface.
Fix this by adding a short guide on how to develop WMI drivers
using the modern bus-based interface.

Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20240402143059.8456-4-W_Armin@gmx.de
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
 2024-04-08 17:45:36 +02:00