[PATCH v3 2/4] ACPI: bus: Introduce acpi_match_acpi_device() helper

[Andy Shevchenko]

In some cases we can't have a physical node associated with
the ACPI device. Yet we want to match it against ID table and
get respective driver data. Introduce the helper for that.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
 drivers/acpi/bus.c   | 15 +++++++++++----
 include/linux/acpi.h |  9 +++++++++
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 20cdfb37da79..ee88bfb60ac2 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -850,6 +850,16 @@ static bool __acpi_match_device(const struct acpi_device *device,
 	return true;
 }
 
+const struct acpi_device_id *acpi_match_acpi_device(const struct acpi_device_id *ids,
+						    const struct acpi_device *adev)
+{
+	const struct acpi_device_id *id = NULL;
+
+	__acpi_match_device(adev, ids, NULL, &id, NULL);
+	return id;
+}
+EXPORT_SYMBOL_GPL(acpi_match_acpi_device);
+
 /**
  * acpi_match_device - Match a struct device against a given list of ACPI IDs
  * @ids: Array of struct acpi_device_id object to match against.
@@ -864,10 +874,7 @@ static bool __acpi_match_device(const struct acpi_device *device,
 const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
 					       const struct device *dev)
 {
-	const struct acpi_device_id *id = NULL;
-
-	__acpi_match_device(acpi_companion_match(dev), ids, NULL, &id, NULL);
-	return id;
+	return acpi_match_acpi_device(ids, acpi_companion_match(dev));
 }
 EXPORT_SYMBOL_GPL(acpi_match_device);
 
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 640f1c07c894..641dc4843987 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -707,6 +707,9 @@ extern int acpi_nvs_register(__u64 start, __u64 size);
 extern int acpi_nvs_for_each_region(int (*func)(__u64, __u64, void *),
 				    void *data);
 
+const struct acpi_device_id *acpi_match_acpi_device(const struct acpi_device_id *ids,
+						    const struct acpi_device *adev);
+
 const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
 					       const struct device *dev);
 
@@ -922,6 +925,12 @@ static inline int acpi_nvs_for_each_region(int (*func)(__u64, __u64, void *),
 
 struct acpi_device_id;
 
+static inline const struct acpi_device_id *acpi_match_acpi_device(
+	const struct acpi_device_id *ids, const struct acpi_device *adev)
+{
+	return NULL;
+}
+
 static inline const struct acpi_device_id *acpi_match_device(
 	const struct acpi_device_id *ids, const struct device *dev)
 {
-- 
2.40.0.1.gaa8946217a0b