driver core: Export get_dev_from_fwnode()

It has turned out get_dev_from_fwnode() is useful at a few other places
outside of the driver core, as in gpiolib.c for example. Therefore let's
make it available as a common helper function.

Suggested-by: Saravana Kannan <saravanak@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tested-by: Hiago De Franco <hiago.franco@toradex.com> # Colibri iMX8X
Tested-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> # TI AM62A,Xilinx ZynqMP ZCU106
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20250701114733.636510-18-ulf.hansson@linaro.org

Author: Ulf Hansson

drivers/base/core.c

@@ -1881,8 +1881,6 @@ static void fw_devlink_unblock_consumers(struct device *dev)
 	device_links_write_unlock();
 }
 
-#define get_dev_from_fwnode(fwnode)	get_device((fwnode)->dev)
-
 static bool fwnode_init_without_drv(struct fwnode_handle *fwnode)
 {
 	struct device *dev;
@@ -5281,6 +5279,12 @@ void device_set_node(struct device *dev, struct fwnode_handle *fwnode)
 }
 EXPORT_SYMBOL_GPL(device_set_node);
 
+struct device *get_dev_from_fwnode(struct fwnode_handle *fwnode)
+{
+	return get_device((fwnode)->dev);
+}
+EXPORT_SYMBOL_GPL(get_dev_from_fwnode);
+
 int device_match_name(struct device *dev, const void *name)
 {
 	return sysfs_streq(dev_name(dev), name);

include/linux/device.h

@@ -1048,6 +1048,7 @@ void device_set_node(struct device *dev, struct fwnode_handle *fwnode);
 int device_add_of_node(struct device *dev, struct device_node *of_node);
 void device_remove_of_node(struct device *dev);
 void device_set_of_node_from_dev(struct device *dev, const struct device *dev2);
+struct device *get_dev_from_fwnode(struct fwnode_handle *fwnode);
 
 static inline struct device_node *dev_of_node(struct device *dev)
 {