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author | Kumar Gala <galak@kernel.crashing.org> | 2008-08-14 08:28:19 -0500 |
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committer | Jon Loeliger <jdl@jdl.com> | 2008-08-14 10:24:58 -0500 |
commit | 02cc83540bd7aed689560908da2e4e7f6a39e9b4 (patch) | |
tree | efae2a322badfc5b97eef815cdb3c3ec6c94de11 /libfdt/fdt_ro.c | |
parent | cb650ae1430ad0629e5fe88a4c208c8021e19b27 (diff) | |
download | device-tree-compiler-02cc83540bd7aed689560908da2e4e7f6a39e9b4.tar.gz |
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>
Diffstat (limited to 'libfdt/fdt_ro.c')
-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 ebd1260..2f3ff48 100644 --- a/libfdt/fdt_ro.c +++ b/libfdt/fdt_ro.c @@ -139,8 +139,25 @@ 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; |