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authorMinghuan Lian <Minghuan.Lian@freescale.com>2012-08-27 19:38:59 -0500
committerGerald Van Baren <gvb@unssw.com>2012-10-15 19:15:39 -0400
commit36ad18a6db0eec546b83e6500ceb7593be53a1ed (patch)
treea16b8142752d256470579f69f4f5c924a3cb9214 /lib
parent6528ff0109d81c1f21d20f9f1370782bccf87bcb (diff)
libfdt: Add support for appending the values to a existing property
Some properties may contain multiple values, these values may need to be added to the property respectively. this patch provides this functionality. The main purpose of fdt_append_prop() is to append the values to a existing property, or create a new property if it dose not exist. Signed-off-by: Minghuan Lian <Minghuan.Lian@freescale.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'lib')
-rw-r--r--lib/libfdt/fdt_rw.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/lib/libfdt/fdt_rw.c b/lib/libfdt/fdt_rw.c
index 5c27a677e35..5ed23d6f193 100644
--- a/lib/libfdt/fdt_rw.c
+++ b/lib/libfdt/fdt_rw.c
@@ -293,6 +293,33 @@ int fdt_setprop(void *fdt, int nodeoffset, const char *name,
return 0;
}
+int fdt_appendprop(void *fdt, int nodeoffset, const char *name,
+ const void *val, int len)
+{
+ struct fdt_property *prop;
+ int err, oldlen, newlen;
+
+ FDT_RW_CHECK_HEADER(fdt);
+
+ prop = fdt_get_property_w(fdt, nodeoffset, name, &oldlen);
+ if (prop) {
+ newlen = len + oldlen;
+ err = _fdt_splice_struct(fdt, prop->data,
+ FDT_TAGALIGN(oldlen),
+ FDT_TAGALIGN(newlen));
+ if (err)
+ return err;
+ prop->len = cpu_to_fdt32(newlen);
+ memcpy(prop->data + oldlen, val, len);
+ } else {
+ err = _fdt_add_property(fdt, nodeoffset, name, len, &prop);
+ if (err)
+ return err;
+ memcpy(prop->data, val, len);
+ }
+ return 0;
+}
+
int fdt_delprop(void *fdt, int nodeoffset, const char *name)
{
struct fdt_property *prop;