[PATCH 1/3] firmware: arm_scmi: Move scmi bus init and exit calls into the driver

Sudeep Holla sudeep.holla at arm.com
Mon Sep 7 07:29:18 EDT 2020


In preparation to enable building scmi as a single module, let us move
the scmi bus {de-,}initialisation call into the driver.

The main reason for this is to keep it simple instead of maintaining
it as separate modules and dealing with all possible initcall races
and deferred probe handling. We can move it as separate modules if
needed in future.

Signed-off-by: Sudeep Holla <sudeep.holla at arm.com>
---
 drivers/firmware/arm_scmi/bus.c    |  6 ++----
 drivers/firmware/arm_scmi/common.h |  3 +++
 drivers/firmware/arm_scmi/driver.c | 16 +++++++++++++++-
 3 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/drivers/firmware/arm_scmi/bus.c b/drivers/firmware/arm_scmi/bus.c
index db55c43a2cbd..1377ec76a45d 100644
--- a/drivers/firmware/arm_scmi/bus.c
+++ b/drivers/firmware/arm_scmi/bus.c
@@ -230,7 +230,7 @@ static void scmi_devices_unregister(void)
 	bus_for_each_dev(&scmi_bus_type, NULL, NULL, __scmi_devices_unregister);
 }
 
-static int __init scmi_bus_init(void)
+int __init scmi_bus_init(void)
 {
 	int retval;
 
@@ -240,12 +240,10 @@ static int __init scmi_bus_init(void)
 
 	return retval;
 }
-subsys_initcall(scmi_bus_init);
 
-static void __exit scmi_bus_exit(void)
+void __exit scmi_bus_exit(void)
 {
 	scmi_devices_unregister();
 	bus_unregister(&scmi_bus_type);
 	ida_destroy(&scmi_bus_id);
 }
-module_exit(scmi_bus_exit);
diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h
index c113e578cc6c..5fa42eba6de7 100644
--- a/drivers/firmware/arm_scmi/common.h
+++ b/drivers/firmware/arm_scmi/common.h
@@ -156,6 +156,9 @@ void scmi_setup_protocol_implemented(const struct scmi_handle *handle,
 
 int scmi_base_protocol_init(struct scmi_handle *h);
 
+int __init scmi_bus_init(void);
+void __exit scmi_bus_exit(void);
+
 /* SCMI Transport */
 /**
  * struct scmi_chan_info - Structure representing a SCMI channel information
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index 03ec74242c14..f4d9601c053f 100644
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c
@@ -928,7 +928,21 @@ static struct platform_driver scmi_driver = {
 	.remove = scmi_remove,
 };
 
-module_platform_driver(scmi_driver);
+static int __init scmi_driver_init(void)
+{
+	scmi_bus_init();
+
+	return platform_driver_register(&scmi_driver);
+}
+module_init(scmi_driver_init);
+
+static void __exit scmi_driver_exit(void)
+{
+	scmi_bus_exit();
+
+	return platform_driver_unregister(&scmi_driver);
+}
+module_exit(scmi_driver_exit);
 
 MODULE_ALIAS("platform: arm-scmi");
 MODULE_AUTHOR("Sudeep Holla <sudeep.holla at arm.com>");
-- 
2.17.1




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