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()
127 		    ((offset - fdt32_to_cpu(*lenp)) % 8) != 0)  in fdt_next_tag()
128 			offset += 4;  in fdt_next_tag()
140 	if (!fdt_offset_ptr(fdt, startoffset, offset - startoffset))  in fdt_next_tag()
143 	*nextoffset = FDT_TAGALIGN(offset);  in fdt_next_tag()
147 int fdt_check_node_offset_(const void *fdt, int offset)  in fdt_check_node_offset_()  argument
149 	if ((offset < 0) || (offset % FDT_TAGSIZE)  in fdt_check_node_offset_()
150 	    || (fdt_next_tag(fdt, offset, &offset) != FDT_BEGIN_NODE))  in fdt_check_node_offset_()
153 	return offset;  in fdt_check_node_offset_()
156 int fdt_check_prop_offset_(const void *fdt, int offset)  in fdt_check_prop_offset_()  argument
158 	if ((offset < 0) || (offset % FDT_TAGSIZE)  in fdt_check_prop_offset_()
159 	    || (fdt_next_tag(fdt, offset, &offset) != FDT_PROP))  in fdt_check_prop_offset_()
162 	return offset;  in fdt_check_prop_offset_()
165 int fdt_next_node(const void *fdt, int offset, int *depth)  in fdt_next_node()  argument
170 	if (offset >= 0)  in fdt_next_node()
171 		if ((nextoffset = fdt_check_node_offset_(fdt, offset)) < 0)  in fdt_next_node()
175 		offset = nextoffset;  in fdt_next_node()
176 		tag = fdt_next_tag(fdt, offset, &nextoffset);  in fdt_next_node()
202 	return offset;  in fdt_next_node()
205 int fdt_first_subnode(const void *fdt, int offset)  in fdt_first_subnode()  argument
209 	offset = fdt_next_node(fdt, offset, &depth);  in fdt_first_subnode()
210 	if (offset < 0 || depth != 1)  in fdt_first_subnode()
213 	return offset;  in fdt_first_subnode()
216 int fdt_next_subnode(const void *fdt, int offset)  in fdt_next_subnode()  argument
225 		offset = fdt_next_node(fdt, offset, &depth);  in fdt_next_subnode()
226 		if (offset < 0 || depth < 1)  in fdt_next_subnode()
230 	return offset;  in fdt_next_subnode()