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-rw-r--r--drivers/of/of_test.c57
1 files changed, 57 insertions, 0 deletions
diff --git a/drivers/of/of_test.c b/drivers/of/of_test.c
new file mode 100644
index 0000000000..a9301d293f
--- /dev/null
+++ b/drivers/of/of_test.c
@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * KUnit tests for OF APIs
+ */
+#include <linux/module.h>
+#include <linux/of.h>
+
+#include <kunit/test.h>
+
+/*
+ * Test that the root node "/" can be found by path.
+ */
+static void of_dtb_root_node_found_by_path(struct kunit *test)
+{
+ struct device_node *np;
+
+ np = of_find_node_by_path("/");
+ KUNIT_EXPECT_NOT_ERR_OR_NULL(test, np);
+ of_node_put(np);
+}
+
+/*
+ * Test that the 'of_root' global variable is always populated when DT code is
+ * enabled. Remove this test once of_root is removed from global access.
+ */
+static void of_dtb_root_node_populates_of_root(struct kunit *test)
+{
+ KUNIT_EXPECT_NOT_ERR_OR_NULL(test, of_root);
+}
+
+static struct kunit_case of_dtb_test_cases[] = {
+ KUNIT_CASE(of_dtb_root_node_found_by_path),
+ KUNIT_CASE(of_dtb_root_node_populates_of_root),
+ {}
+};
+
+static int of_dtb_test_init(struct kunit *test)
+{
+ if (!IS_ENABLED(CONFIG_OF_EARLY_FLATTREE))
+ kunit_skip(test, "requires CONFIG_OF_EARLY_FLATTREE");
+
+ return 0;
+}
+
+/*
+ * Test suite to confirm a DTB is loaded.
+ */
+static struct kunit_suite of_dtb_suite = {
+ .name = "of_dtb",
+ .test_cases = of_dtb_test_cases,
+ .init = of_dtb_test_init,
+};
+
+kunit_test_suites(
+ &of_dtb_suite,
+);
+MODULE_LICENSE("GPL");