135 const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int len)  in fdt_offset_ptr()  argument
137 	unsigned int uoffset = offset;  in fdt_offset_ptr()
138 	unsigned int absoffset = offset + fdt_off_dt_struct(fdt);  in fdt_offset_ptr()
140 	if (offset < 0)  in fdt_offset_ptr()
151 		    || ((offset + len) > fdt_size_dt_struct(fdt)))  in fdt_offset_ptr()
154 	return fdt_offset_ptr_(fdt, offset);  in fdt_offset_ptr()
161 	int offset = startoffset;  in fdt_next_tag()  local
165 	tagp = fdt_offset_ptr(fdt, offset, FDT_TAGSIZE);  in fdt_next_tag()
169 	offset += FDT_TAGSIZE;  in fdt_next_tag()
176 			p = fdt_offset_ptr(fdt, offset++, 1);  in fdt_next_tag()
183 		lenp = fdt_offset_ptr(fdt, offset, sizeof(*lenp));  in fdt_next_tag()
187 		offset += sizeof(struct fdt_property) - FDT_TAGSIZE  in fdt_next_tag()
191 		    ((offset - fdt32_to_cpu(*lenp)) % 8) != 0)  in fdt_next_tag()
192 			offset += 4;  in fdt_next_tag()
204 	if (!fdt_offset_ptr(fdt, startoffset, offset - startoffset))  in fdt_next_tag()
207 	*nextoffset = FDT_TAGALIGN(offset);  in fdt_next_tag()
211 int fdt_check_node_offset_(const void *fdt, int offset)  in fdt_check_node_offset_()  argument
214 	    && ((offset < 0) || (offset % FDT_TAGSIZE)))  in fdt_check_node_offset_()
217 	if (fdt_next_tag(fdt, offset, &offset) != FDT_BEGIN_NODE)  in fdt_check_node_offset_()
220 	return offset;  in fdt_check_node_offset_()
223 int fdt_check_prop_offset_(const void *fdt, int offset)  in fdt_check_prop_offset_()  argument
226 	    && ((offset < 0) || (offset % FDT_TAGSIZE)))  in fdt_check_prop_offset_()
229 	if (fdt_next_tag(fdt, offset, &offset) != FDT_PROP)  in fdt_check_prop_offset_()
232 	return offset;  in fdt_check_prop_offset_()
235 int fdt_next_node(const void *fdt, int offset, int *depth)  in fdt_next_node()  argument
240 	if (offset >= 0)  in fdt_next_node()
241 		if ((nextoffset = fdt_check_node_offset_(fdt, offset)) < 0)  in fdt_next_node()
245 		offset = nextoffset;  in fdt_next_node()
246 		tag = fdt_next_tag(fdt, offset, &nextoffset);  in fdt_next_node()
272 	return offset;  in fdt_next_node()
275 int fdt_first_subnode(const void *fdt, int offset)  in fdt_first_subnode()  argument
279 	offset = fdt_next_node(fdt, offset, &depth);  in fdt_first_subnode()
280 	if (offset < 0 || depth != 1)  in fdt_first_subnode()
283 	return offset;  in fdt_first_subnode()
286 int fdt_next_subnode(const void *fdt, int offset)  in fdt_next_subnode()  argument
295 		offset = fdt_next_node(fdt, offset, &depth);  in fdt_next_subnode()
296 		if (offset < 0 || depth < 1)  in fdt_next_subnode()
300 	return offset;  in fdt_next_subnode()