// SPDX-License-Identifier: GPL-2.0 #include <kunit/fwnode.h>#include <kunit/platform_device.h>#include <kunit/resource.h> #include <linux/device.h>#include <linux/device/bus.h>#include <linux/fwnode.h>#include <linux/of_platform.h>#include <linux/platform_device.h>#include <linux/property.h> #define DEVICE_NAME "test" struct test_priv {	bool probe_done;	bool release_done;	wait_queue_head_t probe_wq;	wait_queue_head_t release_wq;	struct device *dev;}; static int platform_device_devm_init(struct kunit *test){	struct test_priv *priv; 	priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL);	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv);	init_waitqueue_head(&priv->probe_wq);	init_waitqueue_head(&priv->release_wq); 	test->priv = priv; 	return 0;} static void devm_device_action(void *ptr){	struct test_priv *priv = ptr; 	priv->release_done = true;	wake_up_interruptible(&priv->release_wq);} static void devm_put_device_action(void *ptr){	struct test_priv *priv = ptr; 	put_device(priv->dev);	priv->release_done = true;	wake_up_interruptible(&priv->release_wq);} #define RELEASE_TIMEOUT_MS	100 /* * Tests that a platform bus, non-probed device will run its * device-managed actions when unregistered. */static void platform_device_devm_register_unregister_test(struct kunit *test){	struct platform_device *pdev;	struct test_priv *priv = test->priv;	int ret; 	pdev = platform_device_alloc(DEVICE_NAME, PLATFORM_DEVID_NONE);	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); 	ret = platform_device_add(pdev);	KUNIT_ASSERT_EQ(test, ret, 0); 	priv->dev = &pdev->dev; 	ret = devm_add_action_or_reset(priv->dev, devm_device_action, priv);	KUNIT_ASSERT_EQ(test, ret, 0); 	platform_device_unregister(pdev); 	ret = wait_event_interruptible_timeout(priv->release_wq, priv->release_done,					       msecs_to_jiffies(RELEASE_TIMEOUT_MS));	KUNIT_EXPECT_GT(test, ret, 0);} /* * Tests that a platform bus, non-probed device will run its * device-managed actions when unregistered, even if someone still holds * a reference to it. */static void platform_device_devm_register_get_unregister_with_devm_test(struct kunit *test){	struct platform_device *pdev;	struct test_priv *priv = test->priv;	int ret; 	pdev = platform_device_alloc(DEVICE_NAME, PLATFORM_DEVID_NONE);	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); 	ret = platform_device_add(pdev);	KUNIT_ASSERT_EQ(test, ret, 0); 	priv->dev = &pdev->dev; 	get_device(priv->dev); 	ret = devm_add_action_or_reset(priv->dev, devm_put_device_action, priv);	KUNIT_ASSERT_EQ(test, ret, 0); 	platform_device_unregister(pdev); 	ret = wait_event_interruptible_timeout(priv->release_wq, priv->release_done,					       msecs_to_jiffies(RELEASE_TIMEOUT_MS));	KUNIT_EXPECT_GT(test, ret, 0);} static int fake_probe(struct platform_device *pdev){	struct test_priv *priv = platform_get_drvdata(pdev); 	priv->probe_done = true;	wake_up_interruptible(&priv->probe_wq); 	return 0;} static struct platform_driver fake_driver = {	.probe	= fake_probe,	.driver = {		.name = DEVICE_NAME,	},}; /* * Tests that a platform bus, probed device will run its device-managed * actions when unregistered. */static void probed_platform_device_devm_register_unregister_test(struct kunit *test){	struct platform_device *pdev;	struct test_priv *priv = test->priv;	int ret; 	ret = platform_driver_register(&fake_driver);	KUNIT_ASSERT_EQ(test, ret, 0); 	pdev = platform_device_alloc(DEVICE_NAME, PLATFORM_DEVID_NONE);	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); 	priv->dev = &pdev->dev;	platform_set_drvdata(pdev, priv); 	ret = platform_device_add(pdev);	KUNIT_ASSERT_EQ(test, ret, 0); 	ret = wait_event_interruptible_timeout(priv->probe_wq, priv->probe_done,					       msecs_to_jiffies(RELEASE_TIMEOUT_MS));	KUNIT_ASSERT_GT(test, ret, 0); 	ret = devm_add_action_or_reset(priv->dev, devm_device_action, priv);	KUNIT_ASSERT_EQ(test, ret, 0); 	platform_device_unregister(pdev); 	ret = wait_event_interruptible_timeout(priv->release_wq, priv->release_done,					       msecs_to_jiffies(RELEASE_TIMEOUT_MS));	KUNIT_EXPECT_GT(test, ret, 0); 	platform_driver_unregister(&fake_driver);} /* * Tests that a platform bus, probed device will run its device-managed * actions when unregistered, even if someone still holds a reference to * it. */static void probed_platform_device_devm_register_get_unregister_with_devm_test(struct kunit *test){	struct platform_device *pdev;	struct test_priv *priv = test->priv;	int ret; 	ret = platform_driver_register(&fake_driver);	KUNIT_ASSERT_EQ(test, ret, 0); 	pdev = platform_device_alloc(DEVICE_NAME, PLATFORM_DEVID_NONE);	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); 	priv->dev = &pdev->dev;	platform_set_drvdata(pdev, priv); 	ret = platform_device_add(pdev);	KUNIT_ASSERT_EQ(test, ret, 0); 	ret = wait_event_interruptible_timeout(priv->probe_wq, priv->probe_done,					       msecs_to_jiffies(RELEASE_TIMEOUT_MS));	KUNIT_ASSERT_GT(test, ret, 0); 	get_device(priv->dev); 	ret = devm_add_action_or_reset(priv->dev, devm_put_device_action, priv);	KUNIT_ASSERT_EQ(test, ret, 0); 	platform_device_unregister(pdev); 	ret = wait_event_interruptible_timeout(priv->release_wq, priv->release_done,					       msecs_to_jiffies(RELEASE_TIMEOUT_MS));	KUNIT_EXPECT_GT(test, ret, 0); 	platform_driver_unregister(&fake_driver);} static struct kunit_case platform_device_devm_tests[] = {	KUNIT_CASE(platform_device_devm_register_unregister_test),	KUNIT_CASE(platform_device_devm_register_get_unregister_with_devm_test),	KUNIT_CASE(probed_platform_device_devm_register_unregister_test),	KUNIT_CASE(probed_platform_device_devm_register_get_unregister_with_devm_test),	{}}; static struct kunit_suite platform_device_devm_test_suite = {	.name = "platform-device-devm",	.init = platform_device_devm_init,	.test_cases = platform_device_devm_tests,}; static void platform_device_find_by_null_test(struct kunit *test){	struct platform_device *pdev;	int ret; 	pdev = kunit_platform_device_alloc(test, DEVICE_NAME, PLATFORM_DEVID_NONE);	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); 	ret = kunit_platform_device_add(test, pdev);	KUNIT_ASSERT_EQ(test, ret, 0); 	KUNIT_EXPECT_PTR_EQ(test, of_find_device_by_node(NULL), NULL); 	KUNIT_EXPECT_PTR_EQ(test, bus_find_device_by_of_node(&platform_bus_type, NULL), NULL);	KUNIT_EXPECT_PTR_EQ(test, bus_find_device_by_fwnode(&platform_bus_type, NULL), NULL);	KUNIT_EXPECT_PTR_EQ(test, bus_find_device_by_acpi_dev(&platform_bus_type, NULL), NULL); 	KUNIT_EXPECT_FALSE(test, device_match_of_node(&pdev->dev, NULL));	KUNIT_EXPECT_FALSE(test, device_match_fwnode(&pdev->dev, NULL));	KUNIT_EXPECT_FALSE(test, device_match_acpi_dev(&pdev->dev, NULL));	KUNIT_EXPECT_FALSE(test, device_match_acpi_handle(&pdev->dev, NULL));} static struct kunit_case platform_device_match_tests[] = {	KUNIT_CASE(platform_device_find_by_null_test),	{}}; static struct kunit_suite platform_device_match_test_suite = {	.name = "platform-device-match",	.test_cases = platform_device_match_tests,}; static int platform_device_swnode_test_probe(struct platform_device *pdev){	return 0;} static struct platform_driver platform_swnode_test_driver = {	.probe = platform_device_swnode_test_probe,	.driver = {		.name = DEVICE_NAME,	},}; static const struct software_node platform_device_test_swnode = { }; /* * Check that reusing a software node works correctly. If the call to * platform_device_register_full() fails after adding the secondary firmware * node, the software node must be unregistered in the device's release() * callback or the subsequent call to platform_device_register_full() will fail * with -EBUSY due to the software node already having been registered. */static void platform_device_swnode_add_twice(struct kunit *test){	struct platform_device_info pdevinfo;	struct platform_device *pdev;	struct fwnode_handle *fwnode;	bool bound = false;	int ret; 	fwnode = kunit_kzalloc(test, sizeof(*fwnode), GFP_KERNEL);	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, fwnode); 	ret = kunit_platform_driver_register(test, &platform_swnode_test_driver);	KUNIT_ASSERT_EQ(test, ret, 0); 	fwnode_init(fwnode, NULL);	pdevinfo = (struct platform_device_info){		.name = DEVICE_NAME,		.id = PLATFORM_DEVID_NONE,		.fwnode = fwnode,		.swnode = &platform_device_test_swnode,	}; 	pdev = platform_device_register_full(&pdevinfo);	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); 	wait_for_device_probe();	scoped_guard(device, &pdev->dev)		bound = device_is_bound(&pdev->dev); 	KUNIT_ASSERT_TRUE(test, bound); 	platform_device_unregister(pdev); 	pdev = platform_device_register_full(&pdevinfo);	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); 	wait_for_device_probe();	scoped_guard(device, &pdev->dev)		bound = device_is_bound(&pdev->dev); 	KUNIT_ASSERT_TRUE(test, bound); 	platform_device_unregister(pdev);} /* * Check that passing a software node as the primary firmware node of the * platform device does not result in it being unregistered by the call to * device_remove_software_node() in its release path. */static void platform_device_swnode_as_primary(struct kunit *test){	struct platform_device_info pdevinfo;	struct platform_device *pdev;	struct fwnode_handle *fwnode;	bool bound = false;	int ret; 	ret = kunit_platform_driver_register(test, &platform_swnode_test_driver);	KUNIT_ASSERT_EQ(test, ret, 0); 	fwnode = kunit_software_node_register(test, &platform_device_test_swnode);	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, fwnode); 	pdevinfo = (struct platform_device_info){		.name = DEVICE_NAME,		.id = PLATFORM_DEVID_NONE,		.fwnode = fwnode,	}; 	pdev = platform_device_register_full(&pdevinfo);	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); 	wait_for_device_probe();	scoped_guard(device, &pdev->dev)		bound = device_is_bound(&pdev->dev); 	KUNIT_ASSERT_TRUE(test, bound); 	platform_device_unregister(pdev); 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, software_node_fwnode(&platform_device_test_swnode));} /* * Check that passing two software nodes to platform_device_register_full() * fails. */static void platform_device_two_swnodes(struct kunit *test){	static const struct property_entry properties[] = {		PROPERTY_ENTRY_U32("foo", 42),		{ }	}; 	struct platform_device_info pdevinfo;	struct platform_device *pdev;	struct fwnode_handle *fwnode;	int ret; 	ret = kunit_platform_driver_register(test, &platform_swnode_test_driver);	KUNIT_ASSERT_EQ(test, ret, 0); 	fwnode = kunit_software_node_register(test, &platform_device_test_swnode);	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, fwnode); 	pdevinfo = (struct platform_device_info){		.name = DEVICE_NAME,		.id = PLATFORM_DEVID_NONE,		.fwnode = fwnode,		.swnode = &platform_device_test_swnode,	}; 	pdev = platform_device_register_full(&pdevinfo);	KUNIT_ASSERT_TRUE(test, IS_ERR(pdev));	KUNIT_ASSERT_EQ_MSG(test, PTR_ERR(pdev), -EINVAL,			    "Expected errno == -EINVAL, got: %pe", pdev); 	pdevinfo = (struct platform_device_info){		.name = DEVICE_NAME,		.id = PLATFORM_DEVID_NONE,		.swnode = &platform_device_test_swnode,		.properties = properties,	}; 	pdev = platform_device_register_full(&pdevinfo);	KUNIT_ASSERT_TRUE(test, IS_ERR(pdev));	KUNIT_ASSERT_EQ_MSG(test, PTR_ERR(pdev), -EINVAL,			    "Expected errno == -EINVAL, got: %pe", pdev); 	pdevinfo = (struct platform_device_info){		.name = DEVICE_NAME,		.id = PLATFORM_DEVID_NONE,		.fwnode = fwnode,		.properties = properties,	}; 	pdev = platform_device_register_full(&pdevinfo);	KUNIT_ASSERT_TRUE(test, IS_ERR(pdev));	KUNIT_ASSERT_EQ_MSG(test, PTR_ERR(pdev), -EINVAL,			    "Expected errno == -EINVAL, got: %pe", pdev);} static struct kunit_case platform_device_swnode_tests[] = {	KUNIT_CASE(platform_device_swnode_add_twice),	KUNIT_CASE(platform_device_swnode_as_primary),	KUNIT_CASE(platform_device_two_swnodes),	{}}; static struct kunit_suite platform_device_swnode_test_suite = {	.name = "platform-device-swnode",	.test_cases = platform_device_swnode_tests,}; kunit_test_suites(	&platform_device_devm_test_suite,	&platform_device_match_test_suite,	&platform_device_swnode_test_suite,); MODULE_DESCRIPTION("Test module for platform devices");MODULE_AUTHOR("Maxime Ripard <mripard@kernel.org>");MODULE_LICENSE("GPL");