static int check_subnode(struct fdt_header *fdt, int parent, const char *name)
{
int offset;
const struct fdt_node_header *nh;
uint32_t tag;
verbose_printf("Checking subnode \"%s\" of %d...", name, parent);
offset = fdt_subnode_offset(fdt, parent, name);
verbose_printf("offset %d...", offset);
if (offset < 0)
FAIL("fdt_subnode_offset(\"%s\"): %s", name, fdt_strerror(offset));
nh = fdt_offset_ptr(fdt, offset, sizeof(*nh));
verbose_printf("pointer %p\n", nh);
if (! nh)
FAIL("NULL retrieving subnode \"%s\"", name);
tag = fdt32_to_cpu(nh->tag);
if (tag != FDT_BEGIN_NODE)
FAIL("Incorrect tag 0x%08x on property \"%s\"", tag, name);
if (!nodename_eq(nh->name, name))
FAIL("Subnode name mismatch \"%s\" instead of \"%s\"",
nh->name, name);
return offset;
}
int fdt_subnode_offset_namelen(const void *fdt, int parentoffset,
const char *name, int namelen)
{
int level = 0;
uint32_t tag;
int offset, nextoffset;
CHECK_HEADER(fdt);
tag = fdt_next_tag(fdt, parentoffset, &nextoffset);
if (tag != FDT_BEGIN_NODE)
return -FDT_ERR_BADOFFSET;
do {
offset = nextoffset;
tag = fdt_next_tag(fdt, offset, &nextoffset);
switch (tag) {
case FDT_END:
return -FDT_ERR_TRUNCATED;
case FDT_BEGIN_NODE:
level++;
if (level != 1)
continue;
if (nodename_eq(fdt, offset+FDT_TAGSIZE, name, namelen))
/* Found it! */
return offset;
break;
case FDT_END_NODE:
level--;
break;
case FDT_PROP:
case FDT_NOP:
break;
default:
return -FDT_ERR_BADSTRUCTURE;
}
} while (level >= 0);
return -FDT_ERR_NOTFOUND;
}
int fdt_subnode_offset_namelen(const void *fdt, int offset,
const char *name, int namelen)
{
int depth;
CHECK_HEADER(fdt);
for (depth = 0;
offset >= 0;
offset = fdt_next_node(fdt, offset, &depth)) {
if (depth < 0)
return -FDT_ERR_NOTFOUND;
else if ((depth == 1)
&& nodename_eq(fdt, offset, name, namelen))
return offset;
}
return offset; /* error */
}
