139 const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int len)  in fdt_offset_ptr()  argument
141 	unsigned int uoffset = offset;  in fdt_offset_ptr()
142 	unsigned int absoffset = offset + fdt_off_dt_struct(fdt);  in fdt_offset_ptr()
144 	if (offset < 0)  in fdt_offset_ptr()
155 		    || ((offset + len) > fdt_size_dt_struct(fdt)))  in fdt_offset_ptr()
158 	return fdt_offset_ptr_(fdt, offset);  in fdt_offset_ptr()
165 	int offset = startoffset;  in fdt_next_tag()  local
169 	tagp = fdt_offset_ptr(fdt, offset, FDT_TAGSIZE);  in fdt_next_tag()
173 	offset += FDT_TAGSIZE;  in fdt_next_tag()
180 			p = fdt_offset_ptr(fdt, offset++, 1);  in fdt_next_tag()
187 		lenp = fdt_offset_ptr(fdt, offset, sizeof(*lenp));  in fdt_next_tag()
191 		offset += sizeof(struct fdt_property) - FDT_TAGSIZE  in fdt_next_tag()
195 		    ((offset - fdt32_to_cpu(*lenp)) % 8) != 0)  in fdt_next_tag()
196 			offset += 4;  in fdt_next_tag()
208 	if (!fdt_offset_ptr(fdt, startoffset, offset - startoffset))  in fdt_next_tag()
211 	*nextoffset = FDT_TAGALIGN(offset);  in fdt_next_tag()
215 int fdt_check_node_offset_(const void *fdt, int offset)  in fdt_check_node_offset_()  argument
218 	    && ((offset < 0) || (offset % FDT_TAGSIZE)))  in fdt_check_node_offset_()
221 	if (fdt_next_tag(fdt, offset, &offset) != FDT_BEGIN_NODE)  in fdt_check_node_offset_()
224 	return offset;  in fdt_check_node_offset_()
227 int fdt_check_prop_offset_(const void *fdt, int offset)  in fdt_check_prop_offset_()  argument
230 	    && ((offset < 0) || (offset % FDT_TAGSIZE)))  in fdt_check_prop_offset_()
233 	if (fdt_next_tag(fdt, offset, &offset) != FDT_PROP)  in fdt_check_prop_offset_()
236 	return offset;  in fdt_check_prop_offset_()
239 int fdt_next_node(const void *fdt, int offset, int *depth)  in fdt_next_node()  argument
244 	if (offset >= 0)  in fdt_next_node()
245 		if ((nextoffset = fdt_check_node_offset_(fdt, offset)) < 0)  in fdt_next_node()
249 		offset = nextoffset;  in fdt_next_node()
250 		tag = fdt_next_tag(fdt, offset, &nextoffset);  in fdt_next_node()
276 	return offset;  in fdt_next_node()
279 int fdt_first_subnode(const void *fdt, int offset)  in fdt_first_subnode()  argument
283 	offset = fdt_next_node(fdt, offset, &depth);  in fdt_first_subnode()
284 	if (offset < 0 || depth != 1)  in fdt_first_subnode()
287 	return offset;  in fdt_first_subnode()
290 int fdt_next_subnode(const void *fdt, int offset)  in fdt_next_subnode()  argument
299 		offset = fdt_next_node(fdt, offset, &depth);  in fdt_next_subnode()
300 		if (offset < 0 || depth < 1)  in fdt_next_subnode()
304 	return offset;  in fdt_next_subnode()