linux-kernel - [PATCH 1/2] of: Move of_platform_register_reconfig

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Date:   Mon, 17 Jul 2023 08:37:16 -0600
From:   Rob Herring <robh@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Frank Rowand <frowand.list@...il.com>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: [PATCH 1/2] of: Move of_platform_register_reconfig_notifier() into DT core

There's no reason the generic platform bus code needs to call
of_platform_register_reconfig_notifier(). The notifier can be setup
before the platform bus is. Let's move it into of_core_init() which is
called just before platform_bus_init() instead to keep more of the DT
bits in the DT code.

Signed-off-by: Rob Herring <robh@...nel.org>
---
 drivers/base/platform.c     | 2 +-
 drivers/of/base.c           | 1 +
 drivers/of/of_private.h     | 6 ++++++
 drivers/of/platform.c       | 2 ++
 include/linux/of_platform.h | 6 ------
 5 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 77510e4f47de..76bfcba25003 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -1528,6 +1528,6 @@ int __init platform_bus_init(void)
 	error =  bus_register(&platform_bus_type);
 	if (error)
 		device_unregister(&platform_bus);
-	of_platform_register_reconfig_notifier();
+
 	return error;
 }
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 166fb7d75337..e235f3a57ea8 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -167,6 +167,7 @@ void __init of_core_init(void)
 {
 	struct device_node *np;
 
+	of_platform_register_reconfig_notifier();
 
 	/* Create the kset, and register existing nodes */
 	mutex_lock(&of_mutex);
diff --git a/drivers/of/of_private.h b/drivers/of/of_private.h
index b57f1014e419..f38397c7b582 100644
--- a/drivers/of/of_private.h
+++ b/drivers/of/of_private.h
@@ -60,6 +60,12 @@ static inline int of_property_notify(int action, struct device_node *np,
 }
 #endif /* CONFIG_OF_DYNAMIC */
 
+#if defined(CONFIG_OF_DYNAMIC) && defined(CONFIG_OF_ADDRESS)
+void of_platform_register_reconfig_notifier(void);
+#else
+static inline void of_platform_register_reconfig_notifier(void) { }
+#endif
+
 #if defined(CONFIG_OF_KOBJ)
 int of_node_is_attached(const struct device_node *node);
 int __of_add_property_sysfs(struct device_node *np, struct property *pp);
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 051e29b7ad2b..e71adb394b41 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -21,6 +21,8 @@
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 
+#include "of_private.h"
+
 const struct of_device_id of_default_bus_match_table[] = {
 	{ .compatible = "simple-bus", },
 	{ .compatible = "simple-mfd", },
diff --git a/include/linux/of_platform.h b/include/linux/of_platform.h
index d8045bcfc35e..fadfea575485 100644
--- a/include/linux/of_platform.h
+++ b/include/linux/of_platform.h
@@ -127,10 +127,4 @@ static inline int devm_of_platform_populate(struct device *dev)
 static inline void devm_of_platform_depopulate(struct device *dev) { }
 #endif
 
-#if defined(CONFIG_OF_DYNAMIC) && defined(CONFIG_OF_ADDRESS)
-extern void of_platform_register_reconfig_notifier(void);
-#else
-static inline void of_platform_register_reconfig_notifier(void) { }
-#endif
-
 #endif	/* _LINUX_OF_PLATFORM_H */
-- 
2.40.1