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platform/x86: wmi: Allow retrieving the number of WMI object instances

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Currently, the WMI driver core knows how many instances of a given
WMI object exist, but WMI drivers cannot access this information.
At the same time, some current and upcoming WMI drivers want to
have access to this information. Add wmi_instance_count() and
wmidev_instance_count() to allow WMI drivers to get the number of
WMI object instances.

Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20230430203153.5587-2-W_Armin@gmx.de
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Armin Wolf
2023-04-30 22:31:52 +02:00
committed by Hans de Goede
parent 24f7b9a065
commit 2a2b13ae50
3 changed files with 45 additions and 0 deletions
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2
include/linux/acpi.h
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@@ -414,6 +414,8 @@ extern bool acpi_is_pnp_device(struct acpi_device *);
typedef void (*wmi_notify_handler) (u32 value, void *context);
int wmi_instance_count(const char *guid);
extern acpi_status wmi_evaluate_method(const char *guid, u8 instance,
u32 method_id,
const struct acpi_buffer *in,