1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * KUnit tests for OF APIs
 4 */
 5#include <linux/module.h>
 6#include <linux/of.h>
 7
 8#include <kunit/test.h>
 9
10#include "of_private.h"
11
12/*
13 * Test that the root node "/" can be found by path.
14 */
15static void of_dtb_root_node_found_by_path(struct kunit *test)
16{
17	struct device_node *np;
18
19	np = of_find_node_by_path("/");
20	KUNIT_EXPECT_NOT_ERR_OR_NULL(test, np);
21	of_node_put(np);
22}
23
24/*
25 * Test that the 'of_root' global variable is always populated when DT code is
26 * enabled. Remove this test once of_root is removed from global access.
27 */
28static void of_dtb_root_node_populates_of_root(struct kunit *test)
29{
30	KUNIT_EXPECT_NOT_ERR_OR_NULL(test, of_root);
31}
32
33static struct kunit_case of_dtb_test_cases[] = {
34	KUNIT_CASE(of_dtb_root_node_found_by_path),
35	KUNIT_CASE(of_dtb_root_node_populates_of_root),
36	{}
37};
38
39static int of_dtb_test_init(struct kunit *test)
40{
41	of_root_kunit_skip(test);
42	if (!IS_ENABLED(CONFIG_OF_EARLY_FLATTREE))
43		kunit_skip(test, "requires CONFIG_OF_EARLY_FLATTREE");
44
45	return 0;
46}
47
48/*
49 * Test suite to confirm a DTB is loaded.
50 */
51static struct kunit_suite of_dtb_suite = {
52	.name = "of_dtb",
53	.test_cases = of_dtb_test_cases,
54	.init = of_dtb_test_init,
55};
56
57kunit_test_suites(
58	&of_dtb_suite,
59);
60MODULE_DESCRIPTION("KUnit tests for OF APIs");
61MODULE_LICENSE("GPL");