1 /* $NetBSD: subnode_iterate.c,v 1.1.1.3 2019/12/22 12:34:06 skrll Exp $ */
2
3 // SPDX-License-Identifier: LGPL-2.1-or-later
4 /*
5 * libfdt - Flat Device Tree manipulation
6 * Tests that fdt_next_subnode() works as expected
7 *
8 * Copyright (C) 2013 Google, Inc
9 *
10 * Copyright (C) 2007 David Gibson, IBM Corporation.
11 */
12
13 #include <stdlib.h>
14 #include <stdio.h>
15 #include <string.h>
16 #include <stdint.h>
17
18 #include <libfdt.h>
19
20 #include "tests.h"
21 #include "testdata.h"
22
test_node(void * fdt,int parent_offset)23 static void test_node(void *fdt, int parent_offset)
24 {
25 uint32_t subnodes;
26 const fdt32_t *prop;
27 int offset;
28 int count;
29 int len;
30
31 /* This property indicates the number of subnodes to expect */
32 prop = fdt_getprop(fdt, parent_offset, "subnodes", &len);
33 if (!prop || len != sizeof(fdt32_t)) {
34 FAIL("Missing/invalid subnodes property at '%s'",
35 fdt_get_name(fdt, parent_offset, NULL));
36 }
37 subnodes = fdt32_to_cpu(*prop);
38
39 count = 0;
40 fdt_for_each_subnode(offset, fdt, parent_offset)
41 count++;
42
43 if (count != subnodes) {
44 FAIL("Node '%s': Expected %d subnodes, got %d\n",
45 fdt_get_name(fdt, parent_offset, NULL), subnodes,
46 count);
47 }
48 }
49
check_fdt_next_subnode(void * fdt)50 static void check_fdt_next_subnode(void *fdt)
51 {
52 int offset;
53 int count = 0;
54
55 fdt_for_each_subnode(offset, fdt, 0) {
56 test_node(fdt, offset);
57 count++;
58 }
59
60 if (count != 2)
61 FAIL("Expected %d tests, got %d\n", 2, count);
62 }
63
main(int argc,char * argv[])64 int main(int argc, char *argv[])
65 {
66 void *fdt;
67
68 test_init(argc, argv);
69 if (argc != 2)
70 CONFIG("Usage: %s <dtb file>", argv[0]);
71
72 fdt = load_blob(argv[1]);
73 if (!fdt)
74 FAIL("No device tree available");
75
76 check_fdt_next_subnode(fdt);
77
78 PASS();
79 }
80