drivers/of/of_test.c

   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  */
  15 static 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  */
  28 static void of_dtb_root_node_populates_of_root(struct kunit *test)
  29 {
  30         KUNIT_EXPECT_NOT_ERR_OR_NULL(test, of_root);
  31 }
  32
  33 static 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
  39 static 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  */
  51 static 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
  57 kunit_test_suites(
  58         &of_dtb_suite,
  59 );
  60 MODULE_DESCRIPTION("KUnit tests for OF APIs");
  61 MODULE_LICENSE("GPL");