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[108.228.232.20]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-2ca7cae9e9esm1265981eec.23.2026.04.01.20.24.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 Apr 2026 20:24:37 -0700 (PDT) From: "Derek J. Clark" To: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , Hans de Goede Cc: Mark Pearson , Armin Wolf , Jonathan Corbet , Rong Zhang , Kurt Borja , "Derek J . Clark" , platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v7 15/16] platform/x86: lenovo-wmi-helpers: Add helper for creating per-device debugfs dir Date: Thu, 2 Apr 2026 03:24:23 +0000 Message-ID: <20260402032424.678528-16-derekjohn.clark@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260402032424.678528-1-derekjohn.clark@gmail.com> References: <20260402032424.678528-1-derekjohn.clark@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Rong Zhang 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 Signed-off-by: Derek J. Clark --- v7: - Use subsys_initcall() instead of module_init(). --- drivers/platform/x86/lenovo/wmi-helpers.c | 34 +++++++++++++++++++++++ drivers/platform/x86/lenovo/wmi-helpers.h | 2 ++ 2 files changed, 36 insertions(+) diff --git a/drivers/platform/x86/lenovo/wmi-helpers.c b/drivers/platform/x= 86/lenovo/wmi-helpers.c index 5fa7a92c145e..0446d25adf6e 100644 --- a/drivers/platform/x86/lenovo/wmi-helpers.c +++ b/drivers/platform/x86/lenovo/wmi-helpers.c @@ -17,6 +17,8 @@ */ =20 #include +#include +#include #include #include #include @@ -186,6 +188,38 @@ int lwmi_tm_notifier_call(enum thermal_mode *mode) } EXPORT_SYMBOL_NS_GPL(lwmi_tm_notifier_call, "LENOVO_WMI_HELPERS"); =20 +static struct dentry *lwmi_debugfs_dir; + +/** + * lwmi_debugfs_create_dir() - Helper function for creating a debugfs dire= ctory + * for a device. + * @wdev: Pointer to the WMI device to be called. + * + * Caller must remove the directory with debugfs_remove_recursive() on dev= ice + * 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 =3D 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 "); MODULE_DESCRIPTION("Lenovo WMI Helpers Driver"); MODULE_LICENSE("GPL"); diff --git a/drivers/platform/x86/lenovo/wmi-helpers.h b/drivers/platform/x= 86/lenovo/wmi-helpers.h index ed7db3ebba6c..039fe61003ce 100644 --- a/drivers/platform/x86/lenovo/wmi-helpers.h +++ b/drivers/platform/x86/lenovo/wmi-helpers.h @@ -16,6 +16,8 @@ struct wmi_method_args_32 { u32 arg1; }; =20 +struct dentry *lwmi_debugfs_create_dir(struct wmi_device *wdev); + enum lwmi_event_type { LWMI_GZ_GET_THERMAL_MODE =3D 0x01, }; --=20 2.53.0