linux-kernel - [PATCH 2/4] platform/x86: wmi: Add to_wmi

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Message-Id: <20231102042959.11816-2-W_Armin@gmx.de>
Date:   Thu,  2 Nov 2023 05:29:57 +0100
From:   Armin Wolf <W_Armin@....de>
To:     jithu.joseph@...el.com, maurice.ma@...el.com, hdegoede@...hat.com,
        markgross@...nel.org, ilpo.jarvinen@...ux.intel.com
Cc:     Dell.Client.Kernel@...l.com, platform-driver-x86@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/4] 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@....de>
---
 include/linux/wmi.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/linux/wmi.h b/include/linux/wmi.h
index 207544968268..8a643c39fcce 100644
--- 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,
--
2.39.2