path: root/lib
diff options
authorSimon Glass <>2016-02-22 22:55:39 -0700
committerTom Rini <>2016-03-14 14:19:11 -0400
commitf8a2d7a4162d2c8ca6adbb1fe0ef7d2a9765c923 (patch)
tree34545d4396f01a984035300d3891b453466205d0 /lib
parentcc7a64447bc3e90a8133b2fce98d7526089a7033 (diff)
libfdt: Add a function to write a property placeholder
The existing function to add a new property to a tree being built requires that the entire contents of the new property be passed in. For some applications it is more convenient to be able to add the property contents later, perhaps by reading from a file. This avoids double-buffering of the contents. Add a new function to support this and adust the existing fdt_property() to use it. Signed-off-by: Simon Glass <>
Diffstat (limited to 'lib')
1 files changed, 14 insertions, 2 deletions
diff --git a/lib/libfdt/fdt_sw.c b/lib/libfdt/fdt_sw.c
index 320a914991..345a3acbf8 100644
--- a/lib/libfdt/fdt_sw.c
+++ b/lib/libfdt/fdt_sw.c
@@ -175,7 +175,7 @@ static int _fdt_find_add_string(void *fdt, const char *s)
return offset;
-int fdt_property(void *fdt, const char *name, const void *val, int len)
+int fdt_property_placeholder(void *fdt, const char *name, int len, void **valp)
struct fdt_property *prop;
int nameoff;
@@ -193,7 +193,19 @@ int fdt_property(void *fdt, const char *name, const void *val, int len)
prop->tag = cpu_to_fdt32(FDT_PROP);
prop->nameoff = cpu_to_fdt32(nameoff);
prop->len = cpu_to_fdt32(len);
- memcpy(prop->data, val, len);
+ *valp = prop->data;
+ return 0;
+int fdt_property(void *fdt, const char *name, const void *val, int len)
+ void *ptr;
+ int ret;
+ ret = fdt_property_placeholder(fdt, name, len, &ptr);
+ if (ret)
+ return ret;
+ memcpy(ptr, val, len);
return 0;
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