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// SPDX-License-Identifier: GPL-2.0
/*
* KUnit tests for device tree overlays
*/
#include <linux/device/bus.h>
#include <linux/kconfig.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <kunit/of.h>
#include <kunit/test.h>
static const char * const kunit_node_name = "kunit-test";
static const char * const kunit_compatible = "test,empty";
/* Test that of_overlay_apply_kunit() adds a node to the live tree */
static void of_overlay_apply_kunit_apply(struct kunit *test)
{
struct device_node *np;
KUNIT_ASSERT_EQ(test, 0,
of_overlay_apply_kunit(test, kunit_overlay_test));
np = of_find_node_by_name(NULL, kunit_node_name);
KUNIT_EXPECT_NOT_ERR_OR_NULL(test, np);
of_node_put(np);
}
/*
* Test that of_overlay_apply_kunit() creates platform devices with the
* expected device_node
*/
static void of_overlay_apply_kunit_platform_device(struct kunit *test)
{
struct platform_device *pdev;
struct device_node *np;
KUNIT_ASSERT_EQ(test, 0,
of_overlay_apply_kunit(test, kunit_overlay_test));
np = of_find_node_by_name(NULL, kunit_node_name);
of_node_put_kunit(test, np);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
pdev = of_find_device_by_node(np);
KUNIT_EXPECT_NOT_ERR_OR_NULL(test, pdev);
if (pdev)
put_device(&pdev->dev);
}
static int of_overlay_bus_match_compatible(struct device *dev, const void *data)
{
return of_device_is_compatible(dev->of_node, data);
}
/* Test that of_overlay_apply_kunit() cleans up after the test is finished */
static void of_overlay_apply_kunit_cleanup(struct kunit *test)
{
struct kunit fake;
struct platform_device *pdev;
struct device *dev;
struct device_node *np;
if (!IS_ENABLED(CONFIG_OF_EARLY_FLATTREE))
kunit_skip(test, "requires CONFIG_OF_EARLY_FLATTREE for root node");
kunit_init_test(&fake, "fake test", NULL);
KUNIT_ASSERT_EQ(test, fake.status, KUNIT_SUCCESS);
KUNIT_ASSERT_EQ(test, 0,
of_overlay_apply_kunit(&fake, kunit_overlay_test));
np = of_find_node_by_name(NULL, kunit_node_name);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
of_node_put_kunit(test, np);
pdev = of_find_device_by_node(np);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev);
put_device(&pdev->dev); /* Not derefing 'pdev' after this */
/* Remove overlay */
kunit_cleanup(&fake);
/* The node and device should be removed */
np = of_find_node_by_name(NULL, kunit_node_name);
KUNIT_EXPECT_PTR_EQ(test, NULL, np);
of_node_put(np);
dev = bus_find_device(&platform_bus_type, NULL, kunit_compatible,
of_overlay_bus_match_compatible);
KUNIT_EXPECT_PTR_EQ(test, NULL, dev);
put_device(dev);
}
static struct kunit_case of_overlay_apply_kunit_test_cases[] = {
KUNIT_CASE(of_overlay_apply_kunit_apply),
KUNIT_CASE(of_overlay_apply_kunit_platform_device),
KUNIT_CASE(of_overlay_apply_kunit_cleanup),
{}
};
/*
* Test suite for test managed device tree overlays.
*/
static struct kunit_suite of_overlay_apply_kunit_suite = {
.name = "of_overlay_apply_kunit",
.test_cases = of_overlay_apply_kunit_test_cases,
};
kunit_test_suites(
&of_overlay_apply_kunit_suite,
);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("KUnit tests for device tree overlays");
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