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platform/x86: lenovo-wmi-helpers: Add helper for creating per-device debugfs dir

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We are about to add debugfs support for lenovo-wmi-capdata. Let's setup
a debugfs directory called "lenovo_wmi" for tidiness, so that any
lenovo-wmi-* device can put its subdirectory under the directory.
Subdirectories will be named after the corresponding WMI devices.

Signed-off-by: Rong Zhang <i@rong.moe>
Signed-off-by: Derek J. Clark <derekjohn.clark@gmail.com>
Link: https://patch.msgid.link/20260520060740.119554-7-derekjohn.clark@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Rong Zhang 2026-05-20 06:07:39 +00:00 committed by Ilpo Järvinen
parent fb8e9629ef
commit 229e575451
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GPG Key ID: 59AC4F6153E5CE31
2 changed files with 36 additions and 0 deletions
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34
drivers/platform/x86/lenovo/wmi-helpers.c
View File

@ -18,6 +18,8 @@
#include <linux/acpi.h>
#include <linux/cleanup.h>
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/export.h>
#include <linux/module.h>
@ -185,6 +187,38 @@ int lwmi_tm_notifier_call(enum thermal_mode *mode)
}
EXPORT_SYMBOL_NS_GPL(lwmi_tm_notifier_call, "LENOVO_WMI_HELPERS");
static struct dentry *lwmi_debugfs_dir;
/**
* lwmi_debugfs_create_dir() - Helper function for creating a debugfs directory
* for a device.
* @wdev: Pointer to the WMI device to be called.
*
* Caller must remove the directory with debugfs_remove_recursive() on device
* removal.
*
* Return: Pointer to the created directory.
*/
struct dentry *lwmi_debugfs_create_dir(struct wmi_device *wdev)
{
return debugfs_create_dir(dev_name(&wdev->dev), lwmi_debugfs_dir);
}
EXPORT_SYMBOL_NS_GPL(lwmi_debugfs_create_dir, "LENOVO_WMI_HELPERS");
static int __init lwmi_helpers_init(void)
{
lwmi_debugfs_dir = debugfs_create_dir("lenovo_wmi", NULL);
return 0;
}
subsys_initcall(lwmi_helpers_init)
static void __exit lwmi_helpers_exit(void)
{
debugfs_remove_recursive(lwmi_debugfs_dir);
}
module_exit(lwmi_helpers_exit)
MODULE_AUTHOR("Derek J. Clark <derekjohn.clark@gmail.com>");
MODULE_DESCRIPTION("Lenovo WMI Helpers Driver");
MODULE_LICENSE("GPL");

2
drivers/platform/x86/lenovo/wmi-helpers.h
View File

@ -16,6 +16,8 @@ struct wmi_method_args_32 {
u32 arg1;
};
struct dentry *lwmi_debugfs_create_dir(struct wmi_device *wdev);
enum lwmi_event_type {
LWMI_GZ_GET_THERMAL_MODE = 0x01,
};