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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2017 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*
* Support for a 'live' (as opposed to flat) device tree
*/
#ifndef _OF_LIVE_H
#define _OF_LIVE_H
struct abuf;
struct device_node;
/**
* of_live_build() - build a live (hierarchical) tree from a flat DT
*
* @fdt_blob: Input tree to convert
* @rootp: Returns live tree that was created
* Return: 0 if OK, -ve on error
*/
int of_live_build(const void *fdt_blob, struct device_node **rootp);
/**
* unflatten_device_tree() - create tree of device_nodes from flat blob
*
* Note that this allocates a single block of memory, pointed to by *mynodes.
* To free the tree, use free(*mynodes)
*
* unflattens a device-tree, creating the
* tree of struct device_node. It also fills the "name" and "type"
* pointers of the nodes so the normal device-tree walking functions
* can be used.
* @blob: The blob to expand
* @mynodes: The device_node tree created by the call
* Return: 0 if OK, -ve on error
*/
int unflatten_device_tree(const void *blob, struct device_node **mynodes);
/**
* of_live_free() - Dispose of a livetree
*
* This frees memory used by the tree, after which @root becomes invalid and
* cannot be used
*
* @root: Tree to dispose
*/
void of_live_free(struct device_node *root);
/**
* of_live_create_empty() - Create a new, empty tree
*
* @rootp: Returns the root node of the created tree
* Return: 0 if OK, -ENOMEM if out of memory
*/
int of_live_create_empty(struct device_node **rootp);
/**
* of_live_flatten() - Create an FDT from a hierarchical tree
*
* @root: Root node of tree to convert
* @buf: Buffer to return the tree (inited by this function)
* Return: 0 if OK, -ENOMEM if out of memory
*/
int of_live_flatten(const struct device_node *root, struct abuf *buf);
#endif
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