platform/x86: wmi: Add to_wmi_device() helper macro

Add a helper macro for WMI drivers to cast a device to
the corresponding WMI device. This should replace some
boilerplate code.

Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20231103182526.3524-2-W_Armin@gmx.de
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

diff --git a/include/linux/wmi.h b/include/linux/wmi.h
index 207544968268a61e54e775527780211270919549..8a643c39fccedb7a98b7b83f762217f7c23808b0 100644 (file)
--- a/include/linux/wmi.h
+++ b/include/linux/wmi.h
@@ -27,6 +27,14 @@ struct wmi_device {
        bool setable;
 };
 
+/**
+ * to_wmi_device() - Helper macro to cast a device to a wmi_device
+ * @device: device struct
+ *
+ * Cast a struct device to a struct wmi_device.
+ */
+#define to_wmi_device(device)  container_of(device, struct wmi_device, dev)
+
 extern acpi_status wmidev_evaluate_method(struct wmi_device *wdev,
                                          u8 instance, u32 method_id,
                                          const struct acpi_buffer *in,