From: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Date: Mon, 4 May 2026 10:58:56 +0000 (+0200)
Subject: ACPI: provide acpi_bus_find_device_by_name()
X-Git-Tag: v7.2-rc1~61^2~107
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=083a59e05db9203c346e87d822c0c12a0f7a7c85;p=thirdparty%2Fkernel%2Flinux.git

ACPI: provide acpi_bus_find_device_by_name()

Provide a helper allowing to locate an ACPI device by its name.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Acked-by: Rafael J. Wysocki (Intel) <rafael@kernel.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20260504-baytrail-real-swnode-v5-1-c7878b69e383@oss.qualcomm.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 2ec095e2009e4..357b39db345d5 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -1181,6 +1181,21 @@ int acpi_bus_for_each_dev(int (*fn)(struct device *, void *), void *data)
 }
 EXPORT_SYMBOL_GPL(acpi_bus_for_each_dev);
 
+/**
+ * acpi_bus_find_device_by_name() - Locate an ACPI device by its name
+ * @name: Name of the device to match
+ *
+ * The caller is responsible for calling put_device() on the returned object.
+ *
+ * Returns:
+ * New reference to the matched device or NULL if the device can't be found.
+ */
+struct device *acpi_bus_find_device_by_name(const char *name)
+{
+	return bus_find_device_by_name(&acpi_bus_type, NULL, name);
+}
+EXPORT_SYMBOL_GPL(acpi_bus_find_device_by_name);
+
 struct acpi_dev_walk_context {
 	int (*fn)(struct acpi_device *, void *);
 	void *data;
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 67effb91fa983..10d6c6c11bdff 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -798,6 +798,8 @@ int acpi_get_local_u64_address(acpi_handle handle, u64 *addr);
 int acpi_get_local_address(acpi_handle handle, u32 *addr);
 const char *acpi_get_subsystem_id(acpi_handle handle);
 
+struct device *acpi_bus_find_device_by_name(const char *name);
+
 #ifdef CONFIG_ACPI_MRRM
 int acpi_mrrm_max_mem_region(void);
 #endif
@@ -1106,6 +1108,11 @@ static inline const char *acpi_get_subsystem_id(acpi_handle handle)
 	return ERR_PTR(-ENODEV);
 }
 
+static inline struct device *acpi_bus_find_device_by_name(const char *name)
+{
+	return NULL;
+}
+
 static inline int acpi_register_wakeup_handler(int wake_irq,
 	bool (*wakeup)(void *context), void *context)
 {