[PATCH v2 3/9] firmware: arm_scmi: Extend transport driver macro to support ACPI

[Sudeep Holla <sudeep.holla@kernel.org>]

Extend the SCMI transport driver helper to support ACPI-based
systems. Introduce an internal helper macro that accepts both OF
and ACPI match tables, and expose two wrappers:

  - DEFINE_SCMI_TRANSPORT_DRIVER(...) for DT/OF transports
  - DEFINE_SCMI_ACPI_TRANSPORT_DRIVER(...) for ACPI transports

For ACPI, the generated platform_driver now sets .acpi_match_table
via ACPI_PTR(), and the spawned platform_device inherits the
parent device's ACPI companion so subsequent fwnode lookups see
the correct firmware node.

This keeps existing DT users unchanged while allowing transports
to be probed using struct acpi_device_id tables on ACPI platforms.

Signed-off-by: Sudeep Holla <sudeep.holla@kernel.org>
---
 drivers/firmware/arm_scmi/common.h | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h
index cc469370e989..aea3685da824 100644
--- a/drivers/firmware/arm_scmi/common.h
+++ b/drivers/firmware/arm_scmi/common.h
@@ -9,6 +9,7 @@
 #ifndef _SCMI_COMMON_H
 #define _SCMI_COMMON_H
 
+#include <linux/acpi.h>
 #include <linux/bitfield.h>
 #include <linux/completion.h>
 #include <linux/device.h>
@@ -477,7 +478,8 @@ struct scmi_transport {
 	struct scmi_transport_core_operations **core_ops;
 };
 
-#define DEFINE_SCMI_TRANSPORT_DRIVER(__tag, __drv, __desc, __match, __core_ops)\
+#define __DEFINE_SCMI_TRANSPORT_DRIVER(__tag, __drv, __desc, __of_match,       \
+					__acpi_match, __core_ops)	       \
 static void __tag##_dev_free(void *data)				       \
 {									       \
 	struct platform_device *spdev = data;				       \
@@ -498,6 +500,7 @@ static int __tag##_probe(struct platform_device *pdev)			       \
 									       \
 	device_set_of_node_from_dev(&spdev->dev, dev);			       \
 	device_set_node(&spdev->dev, dev_fwnode(dev));			       \
+	ACPI_COMPANION_SET(&spdev->dev, ACPI_COMPANION(dev));		       \
 									       \
 	strans.supplier = dev;						       \
 	memcpy(&strans.desc, &(__desc), sizeof(strans.desc));		       \
@@ -522,11 +525,18 @@ err:									       \
 static struct platform_driver __drv = {					       \
 	.driver = {							       \
 		   .name = #__tag "_transport",				       \
-		   .of_match_table = __match,				       \
+		   .of_match_table = __of_match,			       \
+		   .acpi_match_table = ACPI_PTR(__acpi_match),		       \
 		   },							       \
 	.probe = __tag##_probe,						       \
 }
 
+#define DEFINE_SCMI_TRANSPORT_DRIVER(__tag, __drv, __desc, __match, __core_ops)\
+	__DEFINE_SCMI_TRANSPORT_DRIVER(__tag, __drv, __desc, __match, NULL, __core_ops)
+
+#define DEFINE_SCMI_ACPI_TRANSPORT_DRIVER(__tag, __drv, __desc, __match, __core_ops)\
+	__DEFINE_SCMI_TRANSPORT_DRIVER(__tag, __drv, __desc, NULL, __match, __core_ops)
+
 void scmi_notification_instance_data_set(const struct scmi_handle *handle,
 					 void *priv);
 void *scmi_notification_instance_data_get(const struct scmi_handle *handle);

-- 
2.43.0