device property: Add fwnode_get_parent()
Now that ACPI has support for returning parent firmware node for both types of nodes we can expose this to others as well. This adds a new function fwnode_get_parent() that can be used for DT and ACPI nodes to retrieve the parent firmware node. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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@ -931,6 +931,31 @@ int device_add_properties(struct device *dev,
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}
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EXPORT_SYMBOL_GPL(device_add_properties);
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/**
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* fwnode_get_parent - Return parent firwmare node
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* @fwnode: Firmware whose parent is retrieved
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*
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* Return parent firmware node of the given node if possible or %NULL if no
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* parent was available.
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*/
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struct fwnode_handle *fwnode_get_parent(struct fwnode_handle *fwnode)
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{
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struct fwnode_handle *parent = NULL;
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if (is_of_node(fwnode)) {
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struct device_node *node;
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node = of_get_parent(to_of_node(fwnode));
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if (node)
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parent = &node->fwnode;
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} else if (is_acpi_node(fwnode)) {
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parent = acpi_node_get_parent(fwnode);
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}
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return parent;
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}
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EXPORT_SYMBOL_GPL(fwnode_get_parent);
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/**
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* device_get_next_child_node - Return the next child node handle for a device
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* @dev: Device to find the next child node for.
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@ -70,6 +70,8 @@ int fwnode_property_read_string(struct fwnode_handle *fwnode,
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int fwnode_property_match_string(struct fwnode_handle *fwnode,
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const char *propname, const char *string);
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struct fwnode_handle *fwnode_get_parent(struct fwnode_handle *fwnode);
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struct fwnode_handle *device_get_next_child_node(struct device *dev,
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struct fwnode_handle *child);
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