77 const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int len)  in fdt_offset_ptr()  argument
79 	unsigned absoffset = offset + fdt_off_dt_struct(fdt);  in fdt_offset_ptr()
81 	if ((absoffset < offset)  in fdt_offset_ptr()
87 		if (((offset + len) < offset)  in fdt_offset_ptr()
88 		    || ((offset + len) > fdt_size_dt_struct(fdt)))  in fdt_offset_ptr()
91 	return _fdt_offset_ptr(fdt, offset);  in fdt_offset_ptr()
98 	int offset = startoffset;  in fdt_next_tag()  local
102 	tagp = fdt_offset_ptr(fdt, offset, FDT_TAGSIZE);  in fdt_next_tag()
106 	offset += FDT_TAGSIZE;  in fdt_next_tag()
113 			p = fdt_offset_ptr(fdt, offset++, 1);  in fdt_next_tag()
120 		lenp = fdt_offset_ptr(fdt, offset, sizeof(*lenp));  in fdt_next_tag()
124 		offset += sizeof(struct fdt_property) - FDT_TAGSIZE  in fdt_next_tag()
137 	if (!fdt_offset_ptr(fdt, startoffset, offset - startoffset))  in fdt_next_tag()
140 	*nextoffset = FDT_TAGALIGN(offset);  in fdt_next_tag()
144 int _fdt_check_node_offset(const void *fdt, int offset)  in _fdt_check_node_offset()  argument
146 	if ((offset < 0) || (offset % FDT_TAGSIZE)  in _fdt_check_node_offset()
147 	    || (fdt_next_tag(fdt, offset, &offset) != FDT_BEGIN_NODE))  in _fdt_check_node_offset()
150 	return offset;  in _fdt_check_node_offset()
153 int _fdt_check_prop_offset(const void *fdt, int offset)  in _fdt_check_prop_offset()  argument
155 	if ((offset < 0) || (offset % FDT_TAGSIZE)  in _fdt_check_prop_offset()
156 	    || (fdt_next_tag(fdt, offset, &offset) != FDT_PROP))  in _fdt_check_prop_offset()
159 	return offset;  in _fdt_check_prop_offset()
162 int fdt_next_node(const void *fdt, int offset, int *depth)  in fdt_next_node()  argument
167 	if (offset >= 0)  in fdt_next_node()
168 		if ((nextoffset = _fdt_check_node_offset(fdt, offset)) < 0)  in fdt_next_node()
172 		offset = nextoffset;  in fdt_next_node()
173 		tag = fdt_next_tag(fdt, offset, &nextoffset);  in fdt_next_node()
199 	return offset;  in fdt_next_node()
202 int fdt_first_subnode(const void *fdt, int offset)  in fdt_first_subnode()  argument
206 	offset = fdt_next_node(fdt, offset, &depth);  in fdt_first_subnode()
207 	if (offset < 0 || depth != 1)  in fdt_first_subnode()
210 	return offset;  in fdt_first_subnode()
213 int fdt_next_subnode(const void *fdt, int offset)  in fdt_next_subnode()  argument
222 		offset = fdt_next_node(fdt, offset, &depth);  in fdt_next_subnode()
223 		if (offset < 0 || depth < 1)  in fdt_next_subnode()
227 	return offset;  in fdt_next_subnode()