diff options
Diffstat (limited to 'lib/fdtdec.c')
| -rw-r--r-- | lib/fdtdec.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/lib/fdtdec.c b/lib/fdtdec.c index fd0ad6ea84c..09a7e133a53 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -542,6 +542,39 @@ int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, return -ENOENT; } +int fdtdec_get_alias_highest_id(const void *blob, const char *base) +{ + int base_len = strlen(base); + int prop_offset; + int aliases; + int max = -1; + + debug("Looking for highest alias id for '%s'\n", base); + + aliases = fdt_path_offset(blob, "/aliases"); + for (prop_offset = fdt_first_property_offset(blob, aliases); + prop_offset > 0; + prop_offset = fdt_next_property_offset(blob, prop_offset)) { + const char *prop; + const char *name; + int len, val; + + prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); + debug(" - %s, %s\n", name, prop); + if (*prop != '/' || prop[len - 1] || + strncmp(name, base, base_len)) + continue; + + val = trailing_strtol(name); + if (val > max) { + debug("Found seq %d\n", val); + max = val; + } + } + + return max; +} + const char *fdtdec_get_chosen_prop(const void *blob, const char *name) { int chosen_node; |