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: Saravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/r/20190904211126.47518-2-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 2db62d9..510fabf 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -2198,6 +2198,10 @@ 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,
@@ -2342,6 +2346,9 @@ 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().
*/