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Add a KUnit test that confirms a DTB has been loaded, i.e. there is a root node, and that the of_have_populated_dt() API works properly. We skip the test when CONFIG_OF_EARLY_FLATREE=n because in that case we know architecture code hasn't called unflatten_(and_copy_)?device_tree() which would populate some sort of root node. Cc: Rob Herring <robh+dt@kernel.org> Cc: Frank Rowand <frowand.list@gmail.com> Reviewed-by: David Gow <davidgow@google.com> Cc: Brendan Higgins <brendan.higgins@linux.dev> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lore.kernel.org/r/20240217010557.2381548-8-sboyd@kernel.org Signed-off-by: Rob Herring <robh@kernel.org>
58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* KUnit tests for OF APIs
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*/
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#include <linux/module.h>
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#include <linux/of.h>
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#include <kunit/test.h>
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/*
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* Test that the root node "/" can be found by path.
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*/
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static void of_dtb_root_node_found_by_path(struct kunit *test)
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{
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struct device_node *np;
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np = of_find_node_by_path("/");
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KUNIT_EXPECT_NOT_ERR_OR_NULL(test, np);
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of_node_put(np);
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}
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/*
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* Test that the 'of_root' global variable is always populated when DT code is
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* enabled. Remove this test once of_root is removed from global access.
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*/
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static void of_dtb_root_node_populates_of_root(struct kunit *test)
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{
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KUNIT_EXPECT_NOT_ERR_OR_NULL(test, of_root);
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}
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static struct kunit_case of_dtb_test_cases[] = {
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KUNIT_CASE(of_dtb_root_node_found_by_path),
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KUNIT_CASE(of_dtb_root_node_populates_of_root),
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{}
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};
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static int of_dtb_test_init(struct kunit *test)
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{
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if (!IS_ENABLED(CONFIG_OF_EARLY_FLATTREE))
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kunit_skip(test, "requires CONFIG_OF_EARLY_FLATTREE");
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return 0;
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}
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/*
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* Test suite to confirm a DTB is loaded.
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*/
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static struct kunit_suite of_dtb_suite = {
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.name = "of_dtb",
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.test_cases = of_dtb_test_cases,
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.init = of_dtb_test_init,
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};
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kunit_test_suites(
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&of_dtb_suite,
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);
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MODULE_LICENSE("GPL");
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