1*4e2c3b8cSMasahiro Yamada /* SPDX-License-Identifier: GPL-2.0+ BSD-2-Clause */
2*4e2c3b8cSMasahiro Yamada #include "fdt_host.h"
3*4e2c3b8cSMasahiro Yamada #include "../../scripts/dtc/libfdt/fdt_rw.c"
4*4e2c3b8cSMasahiro Yamada
fdt_remove_unused_strings(const void * old,void * new)5*4e2c3b8cSMasahiro Yamada int fdt_remove_unused_strings(const void *old, void *new)
6*4e2c3b8cSMasahiro Yamada {
7*4e2c3b8cSMasahiro Yamada const struct fdt_property *old_prop;
8*4e2c3b8cSMasahiro Yamada struct fdt_property *new_prop;
9*4e2c3b8cSMasahiro Yamada int size = fdt_totalsize(old);
10*4e2c3b8cSMasahiro Yamada int next_offset, offset;
11*4e2c3b8cSMasahiro Yamada const char *str;
12*4e2c3b8cSMasahiro Yamada int ret;
13*4e2c3b8cSMasahiro Yamada int tag = FDT_PROP;
14*4e2c3b8cSMasahiro Yamada
15*4e2c3b8cSMasahiro Yamada /* Make a copy and remove the strings */
16*4e2c3b8cSMasahiro Yamada memcpy(new, old, size);
17*4e2c3b8cSMasahiro Yamada fdt_set_size_dt_strings(new, 0);
18*4e2c3b8cSMasahiro Yamada
19*4e2c3b8cSMasahiro Yamada /* Add every property name back into the new string table */
20*4e2c3b8cSMasahiro Yamada for (offset = 0; tag != FDT_END; offset = next_offset) {
21*4e2c3b8cSMasahiro Yamada tag = fdt_next_tag(old, offset, &next_offset);
22*4e2c3b8cSMasahiro Yamada if (tag != FDT_PROP)
23*4e2c3b8cSMasahiro Yamada continue;
24*4e2c3b8cSMasahiro Yamada old_prop = fdt_get_property_by_offset(old, offset, NULL);
25*4e2c3b8cSMasahiro Yamada new_prop = (struct fdt_property *)(unsigned long)
26*4e2c3b8cSMasahiro Yamada fdt_get_property_by_offset(new, offset, NULL);
27*4e2c3b8cSMasahiro Yamada str = fdt_string(old, fdt32_to_cpu(old_prop->nameoff));
28*4e2c3b8cSMasahiro Yamada ret = _fdt_find_add_string(new, str);
29*4e2c3b8cSMasahiro Yamada if (ret < 0)
30*4e2c3b8cSMasahiro Yamada return ret;
31*4e2c3b8cSMasahiro Yamada new_prop->nameoff = cpu_to_fdt32(ret);
32*4e2c3b8cSMasahiro Yamada }
33*4e2c3b8cSMasahiro Yamada
34*4e2c3b8cSMasahiro Yamada return 0;
35*4e2c3b8cSMasahiro Yamada }
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