diff options
| author | Kumar Gala | 2008-08-14 08:28:19 -0500 |
|---|---|---|
| committer | Gerald Van Baren | 2008-08-24 22:20:50 -0400 |
| commit | feeca3f578b7f53c032ba203698751c982f8bf5a (patch) | |
| tree | a5fa94b8160afd4dd98466090b827b5e0ba6c69d /libfdt | |
| parent | 0219399a4e3a8edb428e1924e1a03d58cccf8d8e (diff) | |
libfdt: Add support for using aliases in fdt_path_offset()
If the path doesn't start with '/' check to see if it matches some alias
under "/aliases" and substitute the matching alias value in the path
and retry the lookup.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Gerald Van Baren <vanbaren@cideas.com>
Diffstat (limited to 'libfdt')
| -rw-r--r-- | libfdt/fdt_ro.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/libfdt/fdt_ro.c b/libfdt/fdt_ro.c index d566eba2744..b09a6e9eb7e 100644 --- a/libfdt/fdt_ro.c +++ b/libfdt/fdt_ro.c @@ -143,8 +143,25 @@ int fdt_path_offset(const void *fdt, const char *path) FDT_CHECK_HEADER(fdt); - if (*path != '/') - return -FDT_ERR_BADPATH; + /* see if we have an alias */ + if (*path != '/') { + const char *q; + int aliasoffset = fdt_path_offset(fdt, "/aliases"); + + if (aliasoffset < 0) + return -FDT_ERR_BADPATH; + + q = strchr(path, '/'); + if (!q) + q = end; + + p = fdt_getprop_namelen(fdt, aliasoffset, path, q - p, NULL); + if (!p) + return -FDT_ERR_BADPATH; + offset = fdt_path_offset(fdt, p); + + p = q; + } while (*p) { const char *q; |