projects / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 83d290c5 | 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
| 8b50d526 SG |
2 | /* |
| 3 | * Copyright (c) 2017 Google, Inc | |
| 4 | * Written by Simon Glass <[email protected]> | |
| 5 | * | |
| 8b50d526 SG |
6 | * Support for a 'live' (as opposed to flat) device tree |
| 7 | */ | |
| 8 | ||
| 9 | #ifndef _OF_LIVE_H | |
| 10 | #define _OF_LIVE_H | |
| 11 | ||
| 62b1db33 | 12 | struct abuf; |
| 8b50d526 SG |
13 | struct device_node; |
| 14 | ||
| 15 | /** | |
| 16 | * of_live_build() - build a live (hierarchical) tree from a flat DT | |
| 17 | * | |
| 18 | * @fdt_blob: Input tree to convert | |
| 19 | * @rootp: Returns live tree that was created | |
| 185f812c | 20 | * Return: 0 if OK, -ve on error |
| 8b50d526 SG |
21 | */ |
| 22 | int of_live_build(const void *fdt_blob, struct device_node **rootp); | |
| 23 | ||
| 33104847 SG |
24 | /** |
| 25 | * unflatten_device_tree() - create tree of device_nodes from flat blob | |
| 26 | * | |
| 27 | * Note that this allocates a single block of memory, pointed to by *mynodes. | |
| 28 | * To free the tree, use free(*mynodes) | |
| 29 | * | |
| 30 | * unflattens a device-tree, creating the | |
| 31 | * tree of struct device_node. It also fills the "name" and "type" | |
| 32 | * pointers of the nodes so the normal device-tree walking functions | |
| 33 | * can be used. | |
| 34 | * @blob: The blob to expand | |
| 35 | * @mynodes: The device_node tree created by the call | |
| 36 | * Return: 0 if OK, -ve on error | |
| 37 | */ | |
| 38 | int unflatten_device_tree(const void *blob, struct device_node **mynodes); | |
| 39 | ||
| a8f2ac2a SG |
40 | /** |
| 41 | * of_live_free() - Dispose of a livetree | |
| 42 | * | |
| 43 | * This frees memory used by the tree, after which @root becomes invalid and | |
| 44 | * cannot be used | |
| 45 | * | |
| 46 | * @root: Tree to dispose | |
| 47 | */ | |
| 48 | void of_live_free(struct device_node *root); | |
| 49 | ||
| e0c3c21d SG |
50 | /** |
| 51 | * of_live_create_empty() - Create a new, empty tree | |
| 52 | * | |
| 53 | * @rootp: Returns the root node of the created tree | |
| 54 | * Return: 0 if OK, -ENOMEM if out of memory | |
| 55 | */ | |
| 56 | int of_live_create_empty(struct device_node **rootp); | |
| 57 | ||
| 62b1db33 SG |
58 | /** |
| 59 | * of_live_flatten() - Create an FDT from a hierarchical tree | |
| 60 | * | |
| 61 | * @root: Root node of tree to convert | |
| 62 | * @buf: Buffer to return the tree (inited by this function) | |
| 63 | * Return: 0 if OK, -ENOMEM if out of memory | |
| 64 | */ | |
| 65 | int of_live_flatten(const struct device_node *root, struct abuf *buf); | |
| 66 | ||
| 8b50d526 | 67 | #endif |