mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-01 17:10:11 +00:00
62b1db3377
Add a way to flatten a devicetree into binary form. For livetree this involves generating the devicetree using fdt_property() and other calls. For flattree it simply involves providing the buffer containing the tree. Signed-off-by: Simon Glass <sjg@chromium.org>
67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
/* 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
|