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https://github.com/AsahiLinux/u-boot
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35748177c6
This adds the applicable libfdt source files (unmodified) and a README to explain where the source came from.
112 lines
2.4 KiB
C
112 lines
2.4 KiB
C
/*
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* libfdt - Flat Device Tree manipulation
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* Copyright (C) 2006 David Gibson, IBM Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libfdt_env.h"
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#include <fdt.h>
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#include <libfdt.h>
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#include "libfdt_internal.h"
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int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
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const void *val, int len)
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{
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void *propval;
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int proplen;
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propval = fdt_getprop(fdt, nodeoffset, name, &proplen);
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if (! propval)
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return proplen;
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if (proplen != len)
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return -FDT_ERR_NOSPACE;
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memcpy(propval, val, len);
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return 0;
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}
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static void nop_region(void *start, int len)
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{
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uint32_t *p;
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for (p = start; (void *)p < (start + len); p++)
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*p = cpu_to_fdt32(FDT_NOP);
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}
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int fdt_nop_property(void *fdt, int nodeoffset, const char *name)
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{
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struct fdt_property *prop;
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int len;
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prop = fdt_get_property(fdt, nodeoffset, name, &len);
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if (! prop)
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return len;
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nop_region(prop, len + sizeof(*prop));
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return 0;
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}
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int _fdt_node_end_offset(void *fdt, int nodeoffset)
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{
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int level = 0;
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uint32_t tag;
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int offset, nextoffset;
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tag = _fdt_next_tag(fdt, nodeoffset, &nextoffset);
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if (tag != FDT_BEGIN_NODE)
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return -FDT_ERR_BADOFFSET;
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do {
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offset = nextoffset;
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tag = _fdt_next_tag(fdt, offset, &nextoffset);
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switch (tag) {
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case FDT_END:
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return offset;
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case FDT_BEGIN_NODE:
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level++;
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break;
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case FDT_END_NODE:
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level--;
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break;
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case FDT_PROP:
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case FDT_NOP:
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break;
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default:
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return -FDT_ERR_BADSTRUCTURE;
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}
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} while (level >= 0);
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return nextoffset;
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}
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int fdt_nop_node(void *fdt, int nodeoffset)
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{
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int endoffset;
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endoffset = _fdt_node_end_offset(fdt, nodeoffset);
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if (endoffset < 0)
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return endoffset;
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nop_region(fdt_offset_ptr(fdt, nodeoffset, 0), endoffset - nodeoffset);
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return 0;
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}
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