diff options
Diffstat (limited to 'lib/libfdt/fdt_rw.c')
| -rw-r--r-- | lib/libfdt/fdt_rw.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/lib/libfdt/fdt_rw.c b/lib/libfdt/fdt_rw.c index bec8b8ad89..1a358a8ca0 100644 --- a/lib/libfdt/fdt_rw.c +++ b/lib/libfdt/fdt_rw.c @@ -449,3 +449,35 @@ int fdt_pack(void *fdt) return 0; } + +int fdt_remove_unused_strings(const void *old, void *new) +{ + const struct fdt_property *old_prop; + struct fdt_property *new_prop; + int size = fdt_totalsize(old); + int next_offset, offset; + const char *str; + int ret; + int tag = FDT_PROP; + + /* Make a copy and remove the strings */ + memcpy(new, old, size); + fdt_set_size_dt_strings(new, 0); + + /* Add every property name back into the new string table */ + for (offset = 0; tag != FDT_END; offset = next_offset) { + tag = fdt_next_tag(old, offset, &next_offset); + if (tag != FDT_PROP) + continue; + old_prop = fdt_get_property_by_offset(old, offset, NULL); + new_prop = (struct fdt_property *)(unsigned long) + fdt_get_property_by_offset(new, offset, NULL); + str = fdt_string(old, fdt32_to_cpu(old_prop->nameoff)); + ret = _fdt_find_add_string(new, str); + if (ret < 0) + return ret; + new_prop->nameoff = cpu_to_fdt32(ret); + } + + return 0; +} |