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u-boot/include/of_live.h

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SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-06 21:58:06 +00:00
/* SPDX-License-Identifier: GPL-2.0+ */
dm: Add a function to create a 'live' device tree This function converts the flat device tree into a hierarchical one with C structures and pointers. This is easier to access. Signed-off-by: Simon Glass <sjg@chromium.org>
2017-05-19 02:08:55 +00:00
/*
* 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
doc: replace @return by Return: Sphinx expects Return: and not @return to indicate a return value. find . -name '*.c' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; find . -name '*.h' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-01-19 17:05:50 +00:00
* Return: 0 if OK, -ve on error
dm: Add a function to create a 'live' device tree This function converts the flat device tree into a hierarchical one with C structures and pointers. This is easier to access. Signed-off-by: Simon Glass <sjg@chromium.org>
2017-05-19 02:08:55 +00:00
*/
int of_live_build(const void *fdt_blob, struct device_node **rootp);
dm: core: Introduce support for multiple trees At present ofnode only works with a single device tree, for the most part. This is the control FDT used by U-Boot. When booting an OS we may obtain a different device tree and want to modify it. Add some initial support for this into the ofnode API. Note that we don't permit aliases in this other device tree, since the of_access implementation maintains a list of aliases collected at start-up. Also, we don't need aliases to do fixups in the other FDT. So make sure that flat tree and live tree processing are consistent in this area. Signed-off-by: Simon Glass <sjg@chromium.org>
2022-07-30 21:52:08 +00:00
/**
* 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);
fdt: Allow more general use of livetree At present livetree can only be used for the control FDT. It is useful to be able to use the ofnode API for other FDTs, e.g. those used by the upcoming configuration editor. We already have most of the support present, and tests can be marked with the UT_TESTF_OTHER_FDT flag to use another FDT as a special case. But with this change, the functionality becomes more generally available. Plumb in the require support. Signed-off-by: Simon Glass <sjg@chromium.org>
2023-06-01 16:22:42 +00:00
/**
* 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);
dm: Add a function to create a 'live' device tree This function converts the flat device tree into a hierarchical one with C structures and pointers. This is easier to access. Signed-off-by: Simon Glass <sjg@chromium.org>
2017-05-19 02:08:55 +00:00
#endif
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