1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0+ BSD-2-Clause */
2*4882a593Smuzhiyun #include "fdt_host.h"
3*4882a593Smuzhiyun #include "../../scripts/dtc/libfdt/fdt_rw.c"
4*4882a593Smuzhiyun
fdt_remove_unused_strings(const void * old,void * new)5*4882a593Smuzhiyun int fdt_remove_unused_strings(const void *old, void *new)
6*4882a593Smuzhiyun {
7*4882a593Smuzhiyun const struct fdt_property *old_prop;
8*4882a593Smuzhiyun struct fdt_property *new_prop;
9*4882a593Smuzhiyun int size = fdt_totalsize(old);
10*4882a593Smuzhiyun int next_offset, offset;
11*4882a593Smuzhiyun const char *str;
12*4882a593Smuzhiyun int ret;
13*4882a593Smuzhiyun int tag = FDT_PROP;
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun /* Make a copy and remove the strings */
16*4882a593Smuzhiyun memcpy(new, old, size);
17*4882a593Smuzhiyun fdt_set_size_dt_strings(new, 0);
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun /* Add every property name back into the new string table */
20*4882a593Smuzhiyun for (offset = 0; tag != FDT_END; offset = next_offset) {
21*4882a593Smuzhiyun tag = fdt_next_tag(old, offset, &next_offset);
22*4882a593Smuzhiyun if (tag != FDT_PROP)
23*4882a593Smuzhiyun continue;
24*4882a593Smuzhiyun old_prop = fdt_get_property_by_offset(old, offset, NULL);
25*4882a593Smuzhiyun new_prop = (struct fdt_property *)(unsigned long)
26*4882a593Smuzhiyun fdt_get_property_by_offset(new, offset, NULL);
27*4882a593Smuzhiyun str = fdt_string(old, fdt32_to_cpu(old_prop->nameoff));
28*4882a593Smuzhiyun ret = _fdt_find_add_string(new, str);
29*4882a593Smuzhiyun if (ret < 0)
30*4882a593Smuzhiyun return ret;
31*4882a593Smuzhiyun new_prop->nameoff = cpu_to_fdt32(ret);
32*4882a593Smuzhiyun }
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun return 0;
35*4882a593Smuzhiyun }
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