diff --git a/scripts/dtc/treesource.c b/scripts/dtc/treesource.c
new file mode 100644
index 0000000..200159d
--- /dev/null
+++ b/scripts/dtc/treesource.c
@@ -0,0 +1,282 @@
+/*
+ * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2005.
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
+ *                                                                   USA
+ */
+
+#include "dtc.h"
+#include "srcpos.h"
+
+extern FILE *yyin;
+extern int yyparse(void);
+
+struct boot_info *the_boot_info;
+int treesource_error;
+
+struct boot_info *dt_from_source(const char *fname)
+{
+	the_boot_info = NULL;
+	treesource_error = 0;
+
+	srcfile_push(fname);
+	yyin = current_srcfile->f;
+
+	if (yyparse() != 0)
+		die("Unable to parse input tree\n");
+
+	if (treesource_error)
+		die("Syntax error parsing input tree\n");
+
+	return the_boot_info;
+}
+
+static void write_prefix(FILE *f, int level)
+{
+	int i;
+
+	for (i = 0; i < level; i++)
+		fputc('\t', f);
+}
+
+static int isstring(char c)
+{
+	return (isprint(c)
+		|| (c == '\0')
+		|| strchr("\a\b\t\n\v\f\r", c));
+}
+
+static void write_propval_string(FILE *f, struct data val)
+{
+	const char *str = val.val;
+	int i;
+	struct marker *m = val.markers;
+
+	assert(str[val.len-1] == '\0');
+
+	while (m && (m->offset == 0)) {
+		if (m->type == LABEL)
+			fprintf(f, "%s: ", m->ref);
+		m = m->next;
+	}
+	fprintf(f, "\"");
+
+	for (i = 0; i < (val.len-1); i++) {
+		char c = str[i];
+
+		switch (c) {
+		case '\a':
+			fprintf(f, "\\a");
+			break;
+		case '\b':
+			fprintf(f, "\\b");
+			break;
+		case '\t':
+			fprintf(f, "\\t");
+			break;
+		case '\n':
+			fprintf(f, "\\n");
+			break;
+		case '\v':
+			fprintf(f, "\\v");
+			break;
+		case '\f':
+			fprintf(f, "\\f");
+			break;
+		case '\r':
+			fprintf(f, "\\r");
+			break;
+		case '\\':
+			fprintf(f, "\\\\");
+			break;
+		case '\"':
+			fprintf(f, "\\\"");
+			break;
+		case '\0':
+			fprintf(f, "\", ");
+			while (m && (m->offset < i)) {
+				if (m->type == LABEL) {
+					assert(m->offset == (i+1));
+					fprintf(f, "%s: ", m->ref);
+				}
+				m = m->next;
+			}
+			fprintf(f, "\"");
+			break;
+		default:
+			if (isprint(c))
+				fprintf(f, "%c", c);
+			else
+				fprintf(f, "\\x%02hhx", c);
+		}
+	}
+	fprintf(f, "\"");
+
+	
+	for_each_marker_of_type(m, LABEL) {
+		assert (m->offset == val.len);
+		fprintf(f, " %s:", m->ref);
+	}
+}
+
+static void write_propval_cells(FILE *f, struct data val)
+{
+	void *propend = val.val + val.len;
+	cell_t *cp = (cell_t *)val.val;
+	struct marker *m = val.markers;
+
+	fprintf(f, "<");
+	for (;;) {
+		while (m && (m->offset <= ((char *)cp - val.val))) {
+			if (m->type == LABEL) {
+				assert(m->offset == ((char *)cp - val.val));
+				fprintf(f, "%s: ", m->ref);
+			}
+			m = m->next;
+		}
+
+		fprintf(f, "0x%x", fdt32_to_cpu(*cp++));
+		if ((void *)cp >= propend)
+			break;
+		fprintf(f, " ");
+	}
+
+	
+	for_each_marker_of_type(m, LABEL) {
+		assert (m->offset == val.len);
+		fprintf(f, " %s:", m->ref);
+	}
+	fprintf(f, ">");
+}
+
+static void write_propval_bytes(FILE *f, struct data val)
+{
+	void *propend = val.val + val.len;
+	const char *bp = val.val;
+	struct marker *m = val.markers;
+
+	fprintf(f, "[");
+	for (;;) {
+		while (m && (m->offset == (bp-val.val))) {
+			if (m->type == LABEL)
+				fprintf(f, "%s: ", m->ref);
+			m = m->next;
+		}
+
+		fprintf(f, "%02hhx", *bp++);
+		if ((const void *)bp >= propend)
+			break;
+		fprintf(f, " ");
+	}
+
+	
+	for_each_marker_of_type(m, LABEL) {
+		assert (m->offset == val.len);
+		fprintf(f, " %s:", m->ref);
+	}
+	fprintf(f, "]");
+}
+
+static void write_propval(FILE *f, struct property *prop)
+{
+	int len = prop->val.len;
+	const char *p = prop->val.val;
+	struct marker *m = prop->val.markers;
+	int nnotstring = 0, nnul = 0;
+	int nnotstringlbl = 0, nnotcelllbl = 0;
+	int i;
+
+	if (len == 0) {
+		fprintf(f, ";\n");
+		return;
+	}
+
+	for (i = 0; i < len; i++) {
+		if (! isstring(p[i]))
+			nnotstring++;
+		if (p[i] == '\0')
+			nnul++;
+	}
+
+	for_each_marker_of_type(m, LABEL) {
+		if ((m->offset > 0) && (prop->val.val[m->offset - 1] != '\0'))
+			nnotstringlbl++;
+		if ((m->offset % sizeof(cell_t)) != 0)
+			nnotcelllbl++;
+	}
+
+	fprintf(f, " = ");
+	if ((p[len-1] == '\0') && (nnotstring == 0) && (nnul < (len-nnul))
+	    && (nnotstringlbl == 0)) {
+		write_propval_string(f, prop->val);
+	} else if (((len % sizeof(cell_t)) == 0) && (nnotcelllbl == 0)) {
+		write_propval_cells(f, prop->val);
+	} else {
+		write_propval_bytes(f, prop->val);
+	}
+
+	fprintf(f, ";\n");
+}
+
+static void write_tree_source_node(FILE *f, struct node *tree, int level)
+{
+	struct property *prop;
+	struct node *child;
+	struct label *l;
+
+	write_prefix(f, level);
+	for_each_label(tree->labels, l)
+		fprintf(f, "%s: ", l->label);
+	if (tree->name && (*tree->name))
+		fprintf(f, "%s {\n", tree->name);
+	else
+		fprintf(f, "/ {\n");
+
+	for_each_property(tree, prop) {
+		write_prefix(f, level+1);
+		for_each_label(prop->labels, l)
+			fprintf(f, "%s: ", l->label);
+		fprintf(f, "%s", prop->name);
+		write_propval(f, prop);
+	}
+	for_each_child(tree, child) {
+		fprintf(f, "\n");
+		write_tree_source_node(f, child, level+1);
+	}
+	write_prefix(f, level);
+	fprintf(f, "};\n");
+}
+
+
+void dt_to_source(FILE *f, struct boot_info *bi)
+{
+	struct reserve_info *re;
+
+	fprintf(f, "/dts-v1/;\n\n");
+
+	for (re = bi->reservelist; re; re = re->next) {
+		struct label *l;
+
+		for_each_label(re->labels, l)
+			fprintf(f, "%s: ", l->label);
+		fprintf(f, "/memreserve/\t0x%016llx 0x%016llx;\n",
+			(unsigned long long)re->re.address,
+			(unsigned long long)re->re.size);
+	}
+
+	write_tree_source_node(f, bi->dt, 0);
+}
+