1/*
2 * libfdt - Flat Device Tree manipulation
3 *	Tests that fdt_next_subnode() works as expected
4 *
5 * Copyright (C) 2013 Google, Inc
6 *
7 * Copyright (C) 2007 David Gibson, IBM Corporation.
8 *
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public License
11 * as published by the Free Software Foundation; either version 2.1 of
12 * the License, or (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24#include <stdlib.h>
25#include <stdio.h>
26#include <string.h>
27#include <stdint.h>
28
29#include <libfdt.h>
30
31#include "tests.h"
32#include "testdata.h"
33
34static void test_node(void *fdt, int parent_offset)
35{
36	fdt32_t subnodes;
37	const fdt32_t *prop;
38	int offset;
39	int count;
40	int len;
41
42	/* This property indicates the number of subnodes to expect */
43	prop = fdt_getprop(fdt, parent_offset, "subnodes", &len);
44	if (!prop || len != sizeof(fdt32_t)) {
45		FAIL("Missing/invalid subnodes property at '%s'",
46		     fdt_get_name(fdt, parent_offset, NULL));
47	}
48	subnodes = cpu_to_fdt32(*prop);
49
50	count = 0;
51	fdt_for_each_subnode(offset, fdt, parent_offset)
52		count++;
53
54	if (count != subnodes) {
55		FAIL("Node '%s': Expected %d subnodes, got %d\n",
56		     fdt_get_name(fdt, parent_offset, NULL), subnodes,
57		     count);
58	}
59}
60
61static void check_fdt_next_subnode(void *fdt)
62{
63	int offset;
64	int count = 0;
65
66	fdt_for_each_subnode(offset, fdt, 0) {
67		test_node(fdt, offset);
68		count++;
69	}
70
71	if (count != 2)
72		FAIL("Expected %d tests, got %d\n", 2, count);
73}
74
75int main(int argc, char *argv[])
76{
77	void *fdt;
78
79	test_init(argc, argv);
80	if (argc != 2)
81		CONFIG("Usage: %s <dtb file>", argv[0]);
82
83	fdt = load_blob(argv[1]);
84	if (!fdt)
85		FAIL("No device tree available");
86
87	check_fdt_next_subnode(fdt);
88
89	PASS();
90}
91