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Commit 4bf70ab9 authored by Saravana Kannan's avatar Saravana Kannan
Browse files

FROMGIT: driver core: Add fwnode_to_dev() to look up device from fwnode 



It's often useful to look up a device that corresponds to a fwnode. So
add an API to do that irrespective of the bus on which the device has
been added to.

Signed-off-by: default avatarSaravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/r/20190904211126.47518-2-saravanak@google.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>

(cherry-picked from commit 372a67c0c5ef63f55bd1eb480d9555328d8ec0f2
 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git driver-core-next)

Change-Id: I68c36177da083bfb04e73c1b754e740f40faf284
parent c2ad33f0

drivers/base/core.c

+7 −0
Original line number Diff line number Diff line
@@ -1981,6 +1981,10 @@ int device_add(struct device *dev) 
					     BUS_NOTIFY_ADD_DEVICE, dev);



	kobject_uevent(&dev->kobj, KOBJ_ADD);



	if (dev->fwnode && !dev->fwnode->dev)

		dev->fwnode->dev = dev;



	bus_probe_device(dev);

	if (parent)

		klist_add_tail(&dev->p->knode_parent,
@@ -2123,6 +2127,9 @@ void device_del(struct device *dev) 
	kill_device(dev);

	device_unlock(dev);



	if (dev->fwnode && dev->fwnode->dev == dev)

		dev->fwnode->dev = NULL;



	/* Notify clients of device removal.  This call must come

	 * before dpm_sysfs_remove().

	 */

include/linux/fwnode.h

+2 −0
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ struct device; 
struct fwnode_handle {

	struct fwnode_handle *secondary;

	const struct fwnode_operations *ops;

	struct device *dev;

};



/**
@@ -125,5 +126,6 @@ struct fwnode_operations { 
		if (fwnode_has_op(fwnode, op))				\

			(fwnode)->ops->op(fwnode, ## __VA_ARGS__);	\

	} while (false)

#define get_dev_from_fwnode(fwnode)	get_device((fwnode)->dev)



#endif