1 /* SPDX-License-Identifier: GPL-2.0+ BSD-2-Clause */ 2 #include "fdt_host.h" 3 #include "../../scripts/dtc/libfdt/fdt_rw.c" 4 5 int fdt_remove_unused_strings(const void *old, void *new) 6 { 7 const struct fdt_property *old_prop; 8 struct fdt_property *new_prop; 9 int size = fdt_totalsize(old); 10 int next_offset, offset; 11 const char *str; 12 int ret; 13 int tag = FDT_PROP; 14 15 /* Make a copy and remove the strings */ 16 memcpy(new, old, size); 17 fdt_set_size_dt_strings(new, 0); 18 19 /* Add every property name back into the new string table */ 20 for (offset = 0; tag != FDT_END; offset = next_offset) { 21 tag = fdt_next_tag(old, offset, &next_offset); 22 if (tag != FDT_PROP) 23 continue; 24 old_prop = fdt_get_property_by_offset(old, offset, NULL); 25 new_prop = (struct fdt_property *)(unsigned long) 26 fdt_get_property_by_offset(new, offset, NULL); 27 str = fdt_string(old, fdt32_to_cpu(old_prop->nameoff)); 28 ret = fdt_find_add_string_(new, str); 29 if (ret < 0) 30 return ret; 31 new_prop->nameoff = cpu_to_fdt32(ret); 32 } 33 34 return 0; 35 } 36