diff options
| -rw-r--r-- | drivers/base/property.c | 25 | ||||
| -rw-r--r-- | include/linux/property.h | 2 |
2 files changed, 27 insertions, 0 deletions
diff --git a/drivers/base/property.c b/drivers/base/property.c index c458c63e353f..a25233430d18 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -932,6 +932,31 @@ int device_add_properties(struct device *dev, EXPORT_SYMBOL_GPL(device_add_properties); /** + * fwnode_get_parent - Return parent firwmare node + * @fwnode: Firmware whose parent is retrieved + * + * Return parent firmware node of the given node if possible or %NULL if no + * parent was available. + */ +struct fwnode_handle *fwnode_get_parent(struct fwnode_handle *fwnode) +{ + struct fwnode_handle *parent = NULL; + + if (is_of_node(fwnode)) { + struct device_node *node; + + node = of_get_parent(to_of_node(fwnode)); + if (node) + parent = &node->fwnode; + } else if (is_acpi_node(fwnode)) { + parent = acpi_node_get_parent(fwnode); + } + + return parent; +} +EXPORT_SYMBOL_GPL(fwnode_get_parent); + +/** * device_get_next_child_node - Return the next child node handle for a device * @dev: Device to find the next child node for. * @child: Handle to one of the device's child nodes or a null handle. diff --git a/include/linux/property.h b/include/linux/property.h index 64e3a9c6d95f..ab0a8160cef6 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -70,6 +70,8 @@ int fwnode_property_read_string(struct fwnode_handle *fwnode, int fwnode_property_match_string(struct fwnode_handle *fwnode, const char *propname, const char *string); +struct fwnode_handle *fwnode_get_parent(struct fwnode_handle *fwnode); + struct fwnode_handle *device_get_next_child_node(struct device *dev, struct fwnode_handle *child); |