[PATCH v5 2/4] ACPI: of: match PRP0001 in of_match_device

[Markus Probst via B4 Relay <devnull+markus.probst.posteo.de@kernel.org>]

From: Markus Probst <markus.probst@posteo.de>

Export `acpi_of_match_device` function and use it to match for PRP0001
in `of_match_device`, if the device does not have a device node.

This fixes the match data being NULL when using ACPI PRP0001, even though
the device was matched against an of device table.

Signed-off-by: Markus Probst <markus.probst@posteo.de>
---
 drivers/acpi/bus.c   |  7 ++++---
 drivers/of/device.c  |  9 +++++++--
 include/linux/acpi.h | 11 +++++++++++
 3 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 2ec095e2009e..cd02f04cf685 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -831,9 +831,9 @@ const struct acpi_device *acpi_companion_match(const struct device *dev)
  * identifiers and a _DSD object with the "compatible" property, use that
  * property to match against the given list of identifiers.
  */
-static bool acpi_of_match_device(const struct acpi_device *adev,
-				 const struct of_device_id *of_match_table,
-				 const struct of_device_id **of_id)
+bool acpi_of_match_device(const struct acpi_device *adev,
+			  const struct of_device_id *of_match_table,
+			  const struct of_device_id **of_id)
 {
 	const union acpi_object *of_compatible, *obj;
 	int i, nval;
@@ -866,6 +866,7 @@ static bool acpi_of_match_device(const struct acpi_device *adev,
 
 	return false;
 }
+EXPORT_SYMBOL_GPL(acpi_of_match_device);
 
 static bool acpi_of_modalias(struct acpi_device *adev,
 			     char *modalias, size_t len)
diff --git a/drivers/of/device.c b/drivers/of/device.c
index f7e75e527667..128682390058 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -11,6 +11,7 @@
 #include <linux/mod_devicetable.h>
 #include <linux/slab.h>
 #include <linux/platform_device.h>
+#include <linux/acpi.h>
 
 #include <asm/errno.h>
 #include "of_private.h"
@@ -26,8 +27,12 @@
 const struct of_device_id *of_match_device(const struct of_device_id *matches,
 					   const struct device *dev)
 {
-	if (!matches || !dev->of_node || dev->of_node_reused)
-		return NULL;
+	if (!matches || !dev->of_node || dev->of_node_reused) {
+		const struct of_device_id *id = NULL;
+
+		acpi_of_match_device(ACPI_COMPANION(dev), matches, &id);
+		return id;
+	}
 	return of_match_node(matches, dev->of_node);
 }
 EXPORT_SYMBOL(of_match_device);
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 4d2f0bed7a06..1cf23edcbfbb 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -736,6 +736,10 @@ const struct acpi_device_id *acpi_match_acpi_device(const struct acpi_device_id
 const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
 					       const struct device *dev);
 
+bool acpi_of_match_device(const struct acpi_device *adev,
+			  const struct of_device_id *of_match_table,
+			  const struct of_device_id **of_id);
+
 const void *acpi_device_get_match_data(const struct device *dev);
 extern bool acpi_driver_match_device(struct device *dev,
 				     const struct device_driver *drv);
@@ -965,6 +969,13 @@ static inline const struct acpi_device_id *acpi_match_device(
 	return NULL;
 }
 
+static inline bool acpi_of_match_device(const struct acpi_device *adev,
+					const struct of_device_id *of_match_table,
+					const struct of_device_id **of_id)
+{
+	return false;
+}
+
 static inline const void *acpi_device_get_match_data(const struct device *dev)
 {
 	return NULL;

-- 
2.52.0