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| author | Sakari Ailus <sakari.ailus@linux.intel.com> | 2017-03-28 10:52:26 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-03-29 00:00:29 +0200 |
| commit | 233872585de1cf26c3c3da5859ffb3aba45bd486 (patch) | |
| tree | 4331c039ce70ba37369d07f088c8540ea32e037a /drivers/base | |
| parent | 2bd5452d46df46d99b869b59a1532647e2981d75 (diff) | |
| download | lwn-233872585de1cf26c3c3da5859ffb3aba45bd486.tar.gz lwn-233872585de1cf26c3c3da5859ffb3aba45bd486.zip | |
device property: Add fwnode_get_next_parent()
In order to differentiate the functionality between dropping a reference
to the node (or not) for the benefit of OF, introduce
fwnode_get_next_parent().
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/property.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/base/property.c b/drivers/base/property.c index 8a53b8f1db66..627ebc9b570d 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -934,6 +934,27 @@ int device_add_properties(struct device *dev, EXPORT_SYMBOL_GPL(device_add_properties); /** + * fwnode_get_next_parent - Iterate to the node's parent + * @fwnode: Firmware whose parent is retrieved + * + * This is like fwnode_get_parent() except that it drops the refcount + * on the passed node, making it suitable for iterating through a + * node's parents. + * + * Returns a node pointer with refcount incremented, use + * fwnode_handle_node() on it when done. + */ +struct fwnode_handle *fwnode_get_next_parent(struct fwnode_handle *fwnode) +{ + struct fwnode_handle *parent = fwnode_get_parent(fwnode); + + fwnode_handle_put(fwnode); + + return parent; +} +EXPORT_SYMBOL_GPL(fwnode_get_next_parent); + +/** * fwnode_get_parent - Return parent firwmare node * @fwnode: Firmware whose parent is retrieved * |