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| author | Pantelis Antoniou <pantelis.antoniou@konsulko.com> | 2017-07-27 19:33:11 +0300 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2018-07-19 07:01:11 +0200 |
| commit | a1c3b41a6447de79b3b137a9e9b56834f8d9d88a (patch) | |
| tree | 4e5a2090dea23123aa4c23a15a69405b09dd26d7 /cpukit/include/libfdt.h | |
| parent | Fix a few whitespace and style nits (diff) | |
| download | rtems-a1c3b41a6447de79b3b137a9e9b56834f8d9d88a.tar.bz2 | |
Introduce fdt_setprop_placeholder() method
In some cases you need to add a property but the contents of it
are not known at creation time, merely the extend of it.
This method allows you to create a property of a given size (filled
with garbage) while a pointer to the property data will be provided.
Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
[dwg: Corrected commit message]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'cpukit/include/libfdt.h')
| -rw-r--r-- | cpukit/include/libfdt.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/cpukit/include/libfdt.h b/cpukit/include/libfdt.h index a248b1b57a..313c72a2d1 100644 --- a/cpukit/include/libfdt.h +++ b/cpukit/include/libfdt.h @@ -1449,6 +1449,37 @@ int fdt_setprop(void *fdt, int nodeoffset, const char *name, const void *val, int len); /** + * fdt_setprop _placeholder - allocate space for a property + * @fdt: pointer to the device tree blob + * @nodeoffset: offset of the node whose property to change + * @name: name of the property to change + * @len: length of the property value + * @prop_data: return pointer to property data + * + * fdt_setprop_placeholer() allocates the named property in the given node. + * If the property exists it is resized. In either case a pointer to the + * property data is returned. + * + * This function may insert or delete data from the blob, and will + * therefore change the offsets of some existing nodes. + * + * returns: + * 0, on success + * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to + * contain the new property value + * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag + * -FDT_ERR_BADLAYOUT, + * -FDT_ERR_BADMAGIC, + * -FDT_ERR_BADVERSION, + * -FDT_ERR_BADSTATE, + * -FDT_ERR_BADSTRUCTURE, + * -FDT_ERR_BADLAYOUT, + * -FDT_ERR_TRUNCATED, standard meanings + */ +int fdt_setprop_placeholder(void *fdt, int nodeoffset, const char *name, + int len, void **prop_data); + +/** * fdt_setprop_u32 - set a property to a 32-bit integer * @fdt: pointer to the device tree blob * @nodeoffset: offset of the node whose property to change |