| /* 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 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); |
| |
| #endif |