We'd like to apply overlays to the root node in KUnit so we can test platform devices created as children of the root node.

On some architectures (powerpc), the root node isn't marked with OF_POPULATED_BUS. If an overlay tries to modify the root node on these platforms it will fail, while on other platforms, such as ARM, it will succeed. This is because the root node is marked with OF_POPULATED_BUS by of_platform_default_populate_init() calling of_platform_default_populate() with NULL as the first argument.

Loosen the requirement here so that platform devices can be created for nodes created as children of the root node via DT overlays even if the platform bus wasn't populated for the root node.

Reviewed-by: Rob Herring (Arm) robh@kernel.org Cc: Saravana Kannan saravanak@google.com Signed-off-by: Stephen Boyd sboyd@kernel.org --- drivers/of/platform.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/of/platform.c b/drivers/of/platform.c index 389d4ea6bfc1..bda6da866cc8 100644 --- a/drivers/of/platform.c +++ b/drivers/of/platform.c @@ -732,11 +732,14 @@ static int of_platform_notify(struct notifier_block *nb, struct of_reconfig_data *rd = arg; struct platform_device *pdev_parent, *pdev; bool children_left; + struct device_node *parent;

switch (of_reconfig_get_state_change(action, rd)) { case OF_RECONFIG_CHANGE_ADD: - /* verify that the parent is a bus */ - if (!of_node_check_flag(rd->dn->parent, OF_POPULATED_BUS)) + parent = rd->dn->parent; + /* verify that the parent is a bus (or the root node) */ + if (!of_node_is_root(parent) && + of_node_check_flag(parent, OF_POPULATED_BUS)) return NOTIFY_OK; /* not for us */

/* already populated? (driver using of_populate manually) */ @@ -749,7 +752,7 @@ static int of_platform_notify(struct notifier_block *nb, */ rd->dn->fwnode.flags &= ~FWNODE_FLAG_NOT_DEVICE; /* pdev_parent may be NULL when no bus platform device */ - pdev_parent = of_find_device_by_node(rd->dn->parent); + pdev_parent = of_find_device_by_node(parent); pdev = of_platform_device_create(rd->dn, NULL, pdev_parent ? &pdev_parent->dev : NULL); platform_device_put(pdev_parent);

Add the vendor prefix "test" to reserve a vendor prefix for bindings that are purely for testing device tree code. This allows test code to write bindings that can be checked by the schema validator.

Reviewed-by: Rob Herring robh@kernel.org Reviewed-by: David Gow davidgow@google.com Cc: Krzysztof Kozlowski krzysztof.kozlowski+dt@linaro.org Cc: Conor Dooley conor+dt@kernel.org Signed-off-by: Stephen Boyd sboyd@kernel.org --- Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml index fbf47f0bacf1..02a22c2722ec 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml @@ -1456,6 +1456,8 @@ patternProperties: description: Terasic Inc. "^tesla,.*": description: Tesla, Inc. + "^test,.*": + description: Reserved for use by tests. For example, KUnit. "^tfc,.*": description: Three Five Corp "^thead,.*":

Introduce KUnit resource wrappers around platform_driver_register(), platform_device_alloc(), and platform_device_add() so that test authors can register platform drivers/devices from their tests and have the drivers/devices automatically be unregistered when the test is done.

This makes test setup code simpler when a platform driver or platform device is needed. Add a few test cases at the same time to make sure the APIs work as intended.

Cc: Brendan Higgins brendan.higgins@linux.dev Reviewed-by: David Gow davidgow@google.com Cc: Rae Moar rmoar@google.com Reviewed-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: "Rafael J. Wysocki" rafael@kernel.org Signed-off-by: Stephen Boyd sboyd@kernel.org --- Documentation/dev-tools/kunit/api/index.rst | 5 + .../dev-tools/kunit/api/platformdevice.rst | 10 + include/kunit/platform_device.h | 20 ++ lib/kunit/Makefile | 4 +- lib/kunit/platform-test.c | 223 +++++++++++++ lib/kunit/platform.c | 302 ++++++++++++++++++ 6 files changed, 563 insertions(+), 1 deletion(-) create mode 100644 Documentation/dev-tools/kunit/api/platformdevice.rst create mode 100644 include/kunit/platform_device.h create mode 100644 lib/kunit/platform-test.c create mode 100644 lib/kunit/platform.c

diff --git a/Documentation/dev-tools/kunit/api/index.rst b/Documentation/dev-tools/kunit/api/index.rst index 282befa17edf..02b26f5e8750 100644 --- a/Documentation/dev-tools/kunit/api/index.rst +++ b/Documentation/dev-tools/kunit/api/index.rst @@ -10,6 +10,7 @@ API Reference resource functionredirection of + platformdevice

This page documents the KUnit kernel testing API. It is divided into the @@ -36,3 +37,7 @@ Driver KUnit API Documentation/dev-tools/kunit/api/of.rst

- Documents the KUnit device tree (OF) API + +Documentation/dev-tools/kunit/api/platformdevice.rst + + - Documents the KUnit platform device API diff --git a/Documentation/dev-tools/kunit/api/platformdevice.rst b/Documentation/dev-tools/kunit/api/platformdevice.rst new file mode 100644 index 000000000000..49ddd5729003 --- /dev/null +++ b/Documentation/dev-tools/kunit/api/platformdevice.rst @@ -0,0 +1,10 @@ +.. SPDX-License-Identifier: GPL-2.0 + +=================== +Platform Device API +=================== + +The KUnit platform device API is used to test platform devices. + +.. kernel-doc:: lib/kunit/platform.c + :export: diff --git a/include/kunit/platform_device.h b/include/kunit/platform_device.h new file mode 100644 index 000000000000..0fc0999d2420 --- /dev/null +++ b/include/kunit/platform_device.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _KUNIT_PLATFORM_DRIVER_H +#define _KUNIT_PLATFORM_DRIVER_H + +struct kunit; +struct platform_device; +struct platform_driver; + +struct platform_device * +kunit_platform_device_alloc(struct kunit *test, const char *name, int id); +int kunit_platform_device_add(struct kunit *test, struct platform_device *pdev); + +int kunit_platform_device_prepare_wait_for_probe(struct kunit *test, + struct platform_device *pdev, + struct completion *x); + +int kunit_platform_driver_register(struct kunit *test, + struct platform_driver *drv); + +#endif diff --git a/lib/kunit/Makefile b/lib/kunit/Makefile index 309659a32a78..a980ae62eff6 100644 --- a/lib/kunit/Makefile +++ b/lib/kunit/Makefile @@ -8,7 +8,8 @@ kunit-objs += test.o \ try-catch.o \ executor.o \ attributes.o \ - device.o + device.o \ + platform.o

ifeq ($(CONFIG_KUNIT_DEBUGFS),y) kunit-objs += debugfs.o @@ -18,6 +19,7 @@ endif obj-y += hooks.o

obj-$(CONFIG_KUNIT_TEST) += kunit-test.o +obj-$(CONFIG_KUNIT_TEST) += platform-test.o

# string-stream-test compiles built-in only. ifeq ($(CONFIG_KUNIT_TEST),y) diff --git a/lib/kunit/platform-test.c b/lib/kunit/platform-test.c new file mode 100644 index 000000000000..b4fbedadc55e --- /dev/null +++ b/lib/kunit/platform-test.c @@ -0,0 +1,223 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * KUnit test for platform driver infrastructure. + */ + +#include <linux/platform_device.h> + +#include <kunit/platform_device.h> +#include <kunit/test.h> + +/* + * Test that kunit_platform_device_alloc() creates a platform device. + */ +static void kunit_platform_device_alloc_test(struct kunit *test) +{ + KUNIT_EXPECT_NOT_ERR_OR_NULL(test, + kunit_platform_device_alloc(test, "kunit-platform", 1)); +} + +/* + * Test that kunit_platform_device_add() registers a platform device on the + * platform bus with the proper name and id. + */ +static void kunit_platform_device_add_test(struct kunit *test) +{ + struct platform_device *pdev; + const char *name = "kunit-platform-add"; + const int id = -1; + + pdev = kunit_platform_device_alloc(test, name, id); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); + + KUNIT_EXPECT_EQ(test, 0, kunit_platform_device_add(test, pdev)); + KUNIT_EXPECT_TRUE(test, dev_is_platform(&pdev->dev)); + KUNIT_EXPECT_STREQ(test, pdev->name, name); + KUNIT_EXPECT_EQ(test, pdev->id, id); +} + +/* + * Test that kunit_platform_device_add() called twice with the same device name + * and id fails the second time and properly cleans up. + */ +static void kunit_platform_device_add_twice_fails_test(struct kunit *test) +{ + struct platform_device *pdev; + const char *name = "kunit-platform-add-2"; + const int id = -1; + + pdev = kunit_platform_device_alloc(test, name, id); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); + KUNIT_ASSERT_EQ(test, 0, kunit_platform_device_add(test, pdev)); + + pdev = kunit_platform_device_alloc(test, name, id); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); + + KUNIT_EXPECT_NE(test, 0, kunit_platform_device_add(test, pdev)); +} + +static int kunit_platform_device_find_by_name(struct device *dev, const void *data) +{ + return strcmp(dev_name(dev), data) == 0; +} + +/* + * Test that kunit_platform_device_add() cleans up by removing the platform + * device when the test finishes. */ +static void kunit_platform_device_add_cleans_up(struct kunit *test) +{ + struct platform_device *pdev; + const char *name = "kunit-platform-clean"; + const int id = -1; + struct kunit fake; + struct device *dev; + + kunit_init_test(&fake, "kunit_platform_device_add_fake_test", NULL); + KUNIT_ASSERT_EQ(test, fake.status, KUNIT_SUCCESS); + + pdev = kunit_platform_device_alloc(&fake, name, id); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); + KUNIT_ASSERT_EQ(test, 0, kunit_platform_device_add(&fake, pdev)); + dev = bus_find_device(&platform_bus_type, NULL, name, + kunit_platform_device_find_by_name); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, dev); + put_device(dev); + + /* Remove pdev */ + kunit_cleanup(&fake); + + /* + * Failing to migrate the kunit_resource would lead to an extra + * put_device() call on the platform device. The best we can do here is + * make sure the device no longer exists on the bus, but if something + * is wrong we'll see a refcount underflow here. We can't test for a + * refcount underflow because the kref matches the lifetime of the + * device which should already be freed and could be used by something + * else. + */ + dev = bus_find_device(&platform_bus_type, NULL, name, + kunit_platform_device_find_by_name); + KUNIT_EXPECT_PTR_EQ(test, NULL, dev); + put_device(dev); +} + +/* + * Test suite for struct platform_device kunit APIs + */ +static struct kunit_case kunit_platform_device_test_cases[] = { + KUNIT_CASE(kunit_platform_device_alloc_test), + KUNIT_CASE(kunit_platform_device_add_test), + KUNIT_CASE(kunit_platform_device_add_twice_fails_test), + KUNIT_CASE(kunit_platform_device_add_cleans_up), + {} +}; + +static struct kunit_suite kunit_platform_device_suite = { + .name = "kunit_platform_device", + .test_cases = kunit_platform_device_test_cases, +}; + +struct kunit_platform_driver_test_context { + struct platform_driver pdrv; + const char *data; +}; + +static const char * const test_data = "test data"; + +static inline struct kunit_platform_driver_test_context * +to_test_context(struct platform_device *pdev) +{ + return container_of(to_platform_driver(pdev->dev.driver), + struct kunit_platform_driver_test_context, + pdrv); +} + +static int kunit_platform_driver_probe(struct platform_device *pdev) +{ + struct kunit_platform_driver_test_context *ctx; + + ctx = to_test_context(pdev); + ctx->data = test_data; + + return 0; +} + +/* Test that kunit_platform_driver_register() registers a driver that probes. */ +static void kunit_platform_driver_register_test(struct kunit *test) +{ + struct platform_device *pdev; + struct kunit_platform_driver_test_context *ctx; + DECLARE_COMPLETION_ONSTACK(comp); + const char *name = "kunit-platform-register"; + + ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx); + + pdev = kunit_platform_device_alloc(test, name, -1); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); + KUNIT_ASSERT_EQ(test, 0, kunit_platform_device_add(test, pdev)); + + ctx->pdrv.probe = kunit_platform_driver_probe; + ctx->pdrv.driver.name = name; + ctx->pdrv.driver.owner = THIS_MODULE; + + KUNIT_ASSERT_EQ(test, 0, kunit_platform_device_prepare_wait_for_probe(test, pdev, &comp)); + + KUNIT_EXPECT_EQ(test, 0, kunit_platform_driver_register(test, &ctx->pdrv)); + KUNIT_EXPECT_NE(test, 0, wait_for_completion_timeout(&comp, 3 * HZ)); + KUNIT_EXPECT_STREQ(test, ctx->data, test_data); +} + +/* + * Test that kunit_platform_device_prepare_wait_for_probe() completes the completion + * when the device is already probed. + */ +static void kunit_platform_device_prepare_wait_for_probe_completes_when_already_probed(struct kunit *test) +{ + struct platform_device *pdev; + struct kunit_platform_driver_test_context *ctx; + DECLARE_COMPLETION_ONSTACK(comp); + const char *name = "kunit-platform-wait"; + + ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx); + + pdev = kunit_platform_device_alloc(test, name, -1); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); + KUNIT_ASSERT_EQ(test, 0, kunit_platform_device_add(test, pdev)); + + ctx->pdrv.probe = kunit_platform_driver_probe; + ctx->pdrv.driver.name = name; + ctx->pdrv.driver.owner = THIS_MODULE; + + /* Make sure driver has actually probed */ + KUNIT_ASSERT_EQ(test, 0, kunit_platform_device_prepare_wait_for_probe(test, pdev, &comp)); + KUNIT_ASSERT_EQ(test, 0, kunit_platform_driver_register(test, &ctx->pdrv)); + KUNIT_ASSERT_NE(test, 0, wait_for_completion_timeout(&comp, 3 * HZ)); + + reinit_completion(&comp); + KUNIT_ASSERT_EQ(test, 0, kunit_platform_device_prepare_wait_for_probe(test, pdev, &comp)); + + KUNIT_EXPECT_NE(test, 0, wait_for_completion_timeout(&comp, HZ)); +} + +static struct kunit_case kunit_platform_driver_test_cases[] = { + KUNIT_CASE(kunit_platform_driver_register_test), + KUNIT_CASE(kunit_platform_device_prepare_wait_for_probe_completes_when_already_probed), + {} +}; + +/* + * Test suite for struct platform_driver kunit APIs + */ +static struct kunit_suite kunit_platform_driver_suite = { + .name = "kunit_platform_driver", + .test_cases = kunit_platform_driver_test_cases, +}; + +kunit_test_suites( + &kunit_platform_device_suite, + &kunit_platform_driver_suite, +); + +MODULE_LICENSE("GPL"); diff --git a/lib/kunit/platform.c b/lib/kunit/platform.c new file mode 100644 index 000000000000..ba1b0006dc45 --- /dev/null +++ b/lib/kunit/platform.c @@ -0,0 +1,302 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Test managed platform driver + */ + +#include <linux/completion.h> +#include <linux/device/bus.h> +#include <linux/device/driver.h> +#include <linux/platform_device.h> + +#include <kunit/platform_device.h> +#include <kunit/resource.h> + +struct kunit_platform_device_alloc_params { + const char *name; + int id; +}; + +static int kunit_platform_device_alloc_init(struct kunit_resource *res, void *context) +{ + struct kunit_platform_device_alloc_params *params = context; + struct platform_device *pdev; + + pdev = platform_device_alloc(params->name, params->id); + if (!pdev) + return -ENOMEM; + + res->data = pdev; + + return 0; +} + +static void kunit_platform_device_alloc_exit(struct kunit_resource *res) +{ + struct platform_device *pdev = res->data; + + platform_device_put(pdev); +} + +/** + * kunit_platform_device_alloc() - Allocate a KUnit test managed platform device + * @test: test context + * @name: device name of platform device to alloc + * @id: identifier of platform device to alloc. + * + * Allocate a test managed platform device. The device is put when the test completes. + * + * Return: Allocated platform device on success, NULL on failure. + */ +struct platform_device * +kunit_platform_device_alloc(struct kunit *test, const char *name, int id) +{ + struct kunit_platform_device_alloc_params params = { + .name = name, + .id = id, + }; + + return kunit_alloc_resource(test, + kunit_platform_device_alloc_init, + kunit_platform_device_alloc_exit, + GFP_KERNEL, &params); +} +EXPORT_SYMBOL_GPL(kunit_platform_device_alloc); + +static void kunit_platform_device_add_exit(struct kunit_resource *res) +{ + struct platform_device *pdev = res->data; + + platform_device_unregister(pdev); +} + +static bool +kunit_platform_device_alloc_match(struct kunit *test, + struct kunit_resource *res, void *match_data) +{ + struct platform_device *pdev = match_data; + + return res->data == pdev && res->free != kunit_platform_device_alloc_exit; +} + +KUNIT_DEFINE_ACTION_WRAPPER(platform_device_unregister_wrapper, + platform_device_unregister, struct platform_device *); +/** + * kunit_platform_device_add() - Register a KUnit test managed platform device + * @test: test context + * @pdev: platform device to add + * + * Register a test managed platform device. The device is unregistered when the + * test completes. + * + * Return: 0 on success, negative errno on failure. + */ +int kunit_platform_device_add(struct kunit *test, struct platform_device *pdev) +{ + struct kunit_resource *res; + int ret; + + ret = platform_device_add(pdev); + if (ret) + return ret; + + res = kunit_find_resource(test, kunit_platform_device_alloc_match, pdev); + if (res) { + /* + * Transfer the reference count of the platform device if it + * was allocated with kunit_platform_device_alloc(). In this + * case, calling platform_device_put() when the test exits from + * kunit_platform_device_alloc_exit() would lead to reference + * count underflow because platform_device_unregister_wrapper() + * calls platform_device_unregister() which also calls + * platform_device_put(). + * + * Usually callers transfer the refcount initialized in + * platform_device_alloc() to platform_device_add() by calling + * platform_device_unregister() when platform_device_add() + * succeeds or platform_device_put() when it fails. KUnit has to + * keep this straight by redirecting the free routine for the + * resource to the right function. Luckily this only has to + * account for the success scenario. + */ + res->free = kunit_platform_device_add_exit; + kunit_put_resource(res); + } else { + ret = kunit_add_action_or_reset(test, platform_device_unregister_wrapper, pdev); + if (ret) + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(kunit_platform_device_add); + +struct kunit_platform_device_probe_nb { + struct completion *x; + struct device *dev; + struct notifier_block nb; +}; + +static int kunit_platform_device_probe_notify(struct notifier_block *nb, + unsigned long event, void *data) +{ + struct kunit_platform_device_probe_nb *knb; + struct device *dev = data; + + knb = container_of(nb, struct kunit_platform_device_probe_nb, nb); + if (event != BUS_NOTIFY_BOUND_DRIVER || knb->dev != dev) + return NOTIFY_DONE; + + complete(knb->x); + + return NOTIFY_OK; +} + +static void kunit_platform_device_probe_nb_remove(void *nb) +{ + bus_unregister_notifier(&platform_bus_type, nb); +} + +/** + * kunit_platform_device_prepare_wait_for_probe() - Prepare a completion + * variable to wait for a platform device to probe + * @test: test context + * @pdev: platform device to prepare to wait for probe of + * @x: completion variable completed when @dev has probed + * + * Prepare a completion variable @x to wait for @pdev to probe. Waiting on the + * completion forces a preemption, allowing the platform driver to probe. + * + * Example + * + * .. code-block:: c + * + * static int kunit_platform_driver_probe(struct platform_device *pdev) + * { + * return 0; + * } + * + * static void kunit_platform_driver_test(struct kunit *test) + * { + * struct platform_device *pdev; + * struct platform_driver *pdrv; + * DECLARE_COMPLETION_ONSTACK(comp); + * + * pdev = kunit_platform_device_alloc(test, "kunit-platform", -1); + * KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); + * KUNIT_ASSERT_EQ(test, 0, kunit_platform_device_add(test, pdev)); + * + * pdrv = kunit_kzalloc(test, sizeof(*pdrv), GFP_KERNEL); + * KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdrv); + * + * pdrv->probe = kunit_platform_driver_probe; + * pdrv->driver.name = "kunit-platform"; + * pdrv->driver.owner = THIS_MODULE; + * + * KUNIT_ASSERT_EQ(test, 0, kunit_platform_device_prepare_wait_for_probe(test, pdev, &comp)); + * KUNIT_ASSERT_EQ(test, 0, kunit_platform_driver_register(test, pdrv)); + * + * KUNIT_EXPECT_NE(test, 0, wait_for_completion_timeout(&comp, 3 * HZ)); + * } + * + * Return: 0 on success, negative errno on failure. + */ +int kunit_platform_device_prepare_wait_for_probe(struct kunit *test, + struct platform_device *pdev, + struct completion *x) +{ + struct device *dev = &pdev->dev; + struct kunit_platform_device_probe_nb *knb; + bool bound; + + knb = kunit_kzalloc(test, sizeof(*knb), GFP_KERNEL); + if (!knb) + return -ENOMEM; + + knb->nb.notifier_call = kunit_platform_device_probe_notify; + knb->dev = dev; + knb->x = x; + + device_lock(dev); + bound = device_is_bound(dev); + if (bound) { + device_unlock(dev); + complete(x); + kunit_kfree(test, knb); + return 0; + } + + bus_register_notifier(&platform_bus_type, &knb->nb); + device_unlock(&pdev->dev); + + return kunit_add_action_or_reset(test, kunit_platform_device_probe_nb_remove, &knb->nb); +} +EXPORT_SYMBOL_GPL(kunit_platform_device_prepare_wait_for_probe); + +KUNIT_DEFINE_ACTION_WRAPPER(platform_driver_unregister_wrapper, + platform_driver_unregister, struct platform_driver *); +/** + * kunit_platform_driver_register() - Register a KUnit test managed platform driver + * @test: test context + * @drv: platform driver to register + * + * Register a test managed platform driver. This allows callers to embed the + * @drv in a container structure and use container_of() in the probe function + * to pass information to KUnit tests. + * + * Example + * + * .. code-block:: c + * + * struct kunit_test_context { + * struct platform_driver pdrv; + * const char *data; + * }; + * + * static inline struct kunit_test_context * + * to_test_context(struct platform_device *pdev) + * { + * return container_of(to_platform_driver(pdev->dev.driver), + * struct kunit_test_context, + * pdrv); + * } + * + * static int kunit_platform_driver_probe(struct platform_device *pdev) + * { + * struct kunit_test_context *ctx; + * + * ctx = to_test_context(pdev); + * ctx->data = "test data"; + * + * return 0; + * } + * + * static void kunit_platform_driver_test(struct kunit *test) + * { + * struct kunit_test_context *ctx; + * + * ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); + * KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx); + * + * ctx->pdrv.probe = kunit_platform_driver_probe; + * ctx->pdrv.driver.name = "kunit-platform"; + * ctx->pdrv.driver.owner = THIS_MODULE; + * + * KUNIT_EXPECT_EQ(test, 0, kunit_platform_driver_register(test, &ctx->pdrv)); + * <... wait for driver to probe ...> + * KUNIT_EXPECT_STREQ(test, ctx->data, "test data"); + * } + * + * Return: 0 on success, negative errno on failure. + */ +int kunit_platform_driver_register(struct kunit *test, + struct platform_driver *drv) +{ + int ret; + + ret = platform_driver_register(drv); + if (ret) + return ret; + + return kunit_add_action_or_reset(test, platform_driver_unregister_wrapper, drv); +} +EXPORT_SYMBOL_GPL(kunit_platform_driver_register);

Unit tests are more ergonomic and simpler to understand if they don't have to hoist a bunch of code into the test harness init and exit functions. Add some test managed wrappers for the clk APIs so that clk unit tests can write more code in the actual test and less code in the harness.

Only add APIs that are used for now. More wrappers can be added in the future as necessary.

Cc: Brendan Higgins brendan.higgins@linux.dev Cc: David Gow davidgow@google.com Cc: Rae Moar rmoar@google.com Signed-off-by: Stephen Boyd sboyd@kernel.org --- Documentation/dev-tools/kunit/api/clk.rst | 10 + Documentation/dev-tools/kunit/api/index.rst | 5 + drivers/clk/Makefile | 5 + drivers/clk/clk_kunit_helpers.c | 204 ++++++++++++++++++++ include/kunit/clk.h | 28 +++ 5 files changed, 252 insertions(+) create mode 100644 Documentation/dev-tools/kunit/api/clk.rst create mode 100644 drivers/clk/clk_kunit_helpers.c create mode 100644 include/kunit/clk.h

diff --git a/Documentation/dev-tools/kunit/api/clk.rst b/Documentation/dev-tools/kunit/api/clk.rst new file mode 100644 index 000000000000..eeaa50089453 --- /dev/null +++ b/Documentation/dev-tools/kunit/api/clk.rst @@ -0,0 +1,10 @@ +.. SPDX-License-Identifier: GPL-2.0 + +======== +Clk API +======== + +The KUnit clk API is used to test clk providers and clk consumers. + +.. kernel-doc:: drivers/clk/clk_kunit_helpers.c + :export: diff --git a/Documentation/dev-tools/kunit/api/index.rst b/Documentation/dev-tools/kunit/api/index.rst index 02b26f5e8750..5cdb552a0808 100644 --- a/Documentation/dev-tools/kunit/api/index.rst +++ b/Documentation/dev-tools/kunit/api/index.rst @@ -9,6 +9,7 @@ API Reference test resource functionredirection + clk of platformdevice

@@ -34,6 +35,10 @@ Documentation/dev-tools/kunit/api/functionredirection.rst Driver KUnit API ================

+Documentation/dev-tools/kunit/api/clk.rst + + - Documents the KUnit clk API + Documentation/dev-tools/kunit/api/of.rst

- Documents the KUnit device tree (OF) API diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 4abe16c8ccdf..8bb63f1ddd98 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -18,6 +18,11 @@ ifeq ($(CONFIG_OF), y) obj-$(CONFIG_COMMON_CLK) += clk-conf.o endif

+# KUnit specific helpers +ifeq ($(CONFIG_COMMON_CLK), y) +obj-$(CONFIG_KUNIT) += clk_kunit_helpers.o +endif + # hardware specific clock types # please keep this section sorted lexicographically by file path name obj-$(CONFIG_COMMON_CLK_APPLE_NCO) += clk-apple-nco.o diff --git a/drivers/clk/clk_kunit_helpers.c b/drivers/clk/clk_kunit_helpers.c new file mode 100644 index 000000000000..c4287d20214c --- /dev/null +++ b/drivers/clk/clk_kunit_helpers.c @@ -0,0 +1,204 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * KUnit helpers for clk providers and consumers + */ +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/err.h> +#include <linux/kernel.h> +#include <linux/slab.h> + +#include <kunit/clk.h> +#include <kunit/resource.h> + +KUNIT_DEFINE_ACTION_WRAPPER(clk_disable_unprepare_wrapper, + clk_disable_unprepare, struct clk *); +/** + * clk_prepare_enable_kunit() - Test managed clk_prepare_enable() + * @test: The test context + * @clk: clk to prepare and enable + * + * Return: 0 on success, or negative errno on failure. + */ +int clk_prepare_enable_kunit(struct kunit *test, struct clk *clk) +{ + int ret; + + ret = clk_prepare_enable(clk); + if (ret) + return ret; + + return kunit_add_action_or_reset(test, clk_disable_unprepare_wrapper, + clk); +} +EXPORT_SYMBOL_GPL(clk_prepare_enable_kunit); + +KUNIT_DEFINE_ACTION_WRAPPER(clk_put_wrapper, clk_put, struct clk *); + +static struct clk *__clk_get_kunit(struct kunit *test, struct clk *clk) +{ + int ret; + + if (IS_ERR(clk)) + return clk; + + ret = kunit_add_action_or_reset(test, clk_put_wrapper, clk); + if (ret) + return ERR_PTR(ret); + + return clk; +} + +/** + * clk_get_kunit() - Test managed clk_get() + * @test: The test context + * @dev: device for clock "consumer" + * @con_id: clock consumer ID + * + * Just like clk_get(), except the clk is managed by the test case and is + * automatically put with clk_put() after the test case concludes. + * + * Return: new clk consumer or ERR_PTR on failure. + */ +struct clk * +clk_get_kunit(struct kunit *test, struct device *dev, const char *con_id) +{ + struct clk *clk; + + clk = clk_get(dev, con_id); + + return __clk_get_kunit(test, clk); +} +EXPORT_SYMBOL_GPL(clk_get_kunit); + +/** + * of_clk_get_kunit() - Test managed of_clk_get() + * @test: The test context + * @np: device_node for clock "consumer" + * @index: index in 'clocks' property of @np + * + * Just like of_clk_get(), except the clk is managed by the test case and is + * automatically put with clk_put() after the test case concludes. + * + * Return: new clk consumer or ERR_PTR on failure. + */ +struct clk * +of_clk_get_kunit(struct kunit *test, struct device_node *np, int index) +{ + struct clk *clk; + + clk = of_clk_get(np, index); + + return __clk_get_kunit(test, clk); +} +EXPORT_SYMBOL_GPL(of_clk_get_kunit); + +/** + * clk_hw_get_clk_kunit() - Test managed clk_hw_get_clk() + * @test: The test context + * @hw: clk_hw associated with the clk being consumed + * @con_id: connection ID string on device + * + * Just like clk_hw_get_clk(), except the clk is managed by the test case and + * is automatically put with clk_put() after the test case concludes. + * + * Return: new clk consumer or ERR_PTR on failure. + */ +struct clk * +clk_hw_get_clk_kunit(struct kunit *test, struct clk_hw *hw, const char *con_id) +{ + struct clk *clk; + + clk = clk_hw_get_clk(hw, con_id); + + return __clk_get_kunit(test, clk); +} +EXPORT_SYMBOL_GPL(clk_hw_get_clk_kunit); + +/** + * clk_hw_get_clk_prepared_enabled_kunit() - Test managed clk_hw_get_clk() + clk_prepare_enable() + * @test: The test context + * @hw: clk_hw associated with the clk being consumed + * @con_id: connection ID string on device + * + * Just like + * + * .. code-block:: c + * + * struct clk *clk = clk_hw_get_clk(...); + * clk_prepare_enable(clk); + * + * except the clk is managed by the test case and is automatically disabled and + * unprepared with clk_disable_unprepare() and put with clk_put() after the + * test case concludes. + * + * Return: new clk consumer that is prepared and enabled or ERR_PTR on failure. + */ +struct clk * +clk_hw_get_clk_prepared_enabled_kunit(struct kunit *test, struct clk_hw *hw, + const char *con_id) +{ + int ret; + struct clk *clk; + + clk = clk_hw_get_clk_kunit(test, hw, con_id); + if (IS_ERR(clk)) + return clk; + + ret = clk_prepare_enable_kunit(test, clk); + if (ret) + return ERR_PTR(ret); + + return clk; +} +EXPORT_SYMBOL_GPL(clk_hw_get_clk_prepared_enabled_kunit); + +KUNIT_DEFINE_ACTION_WRAPPER(clk_hw_unregister_wrapper, + clk_hw_unregister, struct clk_hw *); + +/** + * clk_hw_register_kunit() - Test managed clk_hw_register() + * @test: The test context + * @dev: device that is registering this clock + * @hw: link to hardware-specific clock data + * + * Just like clk_hw_register(), except the clk registration is managed by the + * test case and is automatically unregistered after the test case concludes. + * + * Return: 0 on success or a negative errno value on failure. + */ +int clk_hw_register_kunit(struct kunit *test, struct device *dev, struct clk_hw *hw) +{ + int ret; + + ret = clk_hw_register(dev, hw); + if (ret) + return ret; + + return kunit_add_action_or_reset(test, clk_hw_unregister_wrapper, hw); +} +EXPORT_SYMBOL_GPL(clk_hw_register_kunit); + +/** + * of_clk_hw_register_kunit() - Test managed of_clk_hw_register() + * @test: The test context + * @node: device_node of device that is registering this clock + * @hw: link to hardware-specific clock data + * + * Just like of_clk_hw_register(), except the clk registration is managed by + * the test case and is automatically unregistered after the test case + * concludes. + * + * Return: 0 on success or a negative errno value on failure. + */ +int of_clk_hw_register_kunit(struct kunit *test, struct device_node *node, struct clk_hw *hw) +{ + int ret; + + ret = of_clk_hw_register(node, hw); + if (ret) + return ret; + + return kunit_add_action_or_reset(test, clk_hw_unregister_wrapper, hw); +} +EXPORT_SYMBOL_GPL(of_clk_hw_register_kunit); diff --git a/include/kunit/clk.h b/include/kunit/clk.h new file mode 100644 index 000000000000..73bc99cefe7b --- /dev/null +++ b/include/kunit/clk.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _CLK_KUNIT_H +#define _CLK_KUNIT_H + +struct clk; +struct clk_hw; +struct device; +struct device_node; +struct kunit; + +struct clk * +clk_get_kunit(struct kunit *test, struct device *dev, const char *con_id); +struct clk * +of_clk_get_kunit(struct kunit *test, struct device_node *np, int index); + +struct clk * +clk_hw_get_clk_kunit(struct kunit *test, struct clk_hw *hw, const char *con_id); +struct clk * +clk_hw_get_clk_prepared_enabled_kunit(struct kunit *test, struct clk_hw *hw, + const char *con_id); + +int clk_prepare_enable_kunit(struct kunit *test, struct clk *clk); + +int clk_hw_register_kunit(struct kunit *test, struct device *dev, struct clk_hw *hw); +int of_clk_hw_register_kunit(struct kunit *test, struct device_node *node, + struct clk_hw *hw); + +#endif

Test that clks registered with 'struct clk_parent_data' work as intended and can find their parents.

Cc: Christian Marangi ansuelsmth@gmail.com Cc: Brendan Higgins brendan.higgins@linux.dev Reviewed-by: David Gow davidgow@google.com Cc: Rae Moar rmoar@google.com Signed-off-by: Stephen Boyd sboyd@kernel.org --- drivers/clk/Kconfig | 2 + drivers/clk/Makefile | 3 +- drivers/clk/clk_parent_data_test.h | 10 + drivers/clk/clk_test.c | 453 +++++++++++++++++++- drivers/clk/kunit_clk_parent_data_test.dtso | 28 ++ 5 files changed, 494 insertions(+), 2 deletions(-) create mode 100644 drivers/clk/clk_parent_data_test.h create mode 100644 drivers/clk/kunit_clk_parent_data_test.dtso

diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index d8482e015c49..0e4819c1cfd2 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -508,6 +508,8 @@ config CLK_KUNIT_TEST tristate "Basic Clock Framework Kunit Tests" if !KUNIT_ALL_TESTS depends on KUNIT default KUNIT_ALL_TESTS + select OF_OVERLAY if OF + select DTC help Kunit tests for the common clock framework.

diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 7b57e3d22cee..ed4e1a0e6943 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -2,7 +2,8 @@ # common clock types obj-$(CONFIG_HAVE_CLK) += clk-devres.o clk-bulk.o clkdev.o obj-$(CONFIG_COMMON_CLK) += clk.o -obj-$(CONFIG_CLK_KUNIT_TEST) += clk_test.o +obj-$(CONFIG_CLK_KUNIT_TEST) += clk_test.o \ + kunit_clk_parent_data_test.dtbo.o obj-$(CONFIG_COMMON_CLK) += clk-divider.o obj-$(CONFIG_COMMON_CLK) += clk-fixed-factor.o obj-$(CONFIG_COMMON_CLK) += clk-fixed-rate.o diff --git a/drivers/clk/clk_parent_data_test.h b/drivers/clk/clk_parent_data_test.h new file mode 100644 index 000000000000..eedd53ae910d --- /dev/null +++ b/drivers/clk/clk_parent_data_test.h @@ -0,0 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _CLK_PARENT_DATA_TEST_H +#define _CLK_PARENT_DATA_TEST_H + +#define CLK_PARENT_DATA_1MHZ_NAME "1mhz_fixed_legacy" +#define CLK_PARENT_DATA_PARENT1 "parent_fwname" +#define CLK_PARENT_DATA_PARENT2 "50" +#define CLK_PARENT_DATA_50MHZ_NAME "50_clk" + +#endif diff --git a/drivers/clk/clk_test.c b/drivers/clk/clk_test.c index 39e2b5ff4f51..c2127f46fb93 100644 --- a/drivers/clk/clk_test.c +++ b/drivers/clk/clk_test.c @@ -4,12 +4,19 @@ */ #include <linux/clk.h> #include <linux/clk-provider.h> +#include <linux/of.h> +#include <linux/platform_device.h>

/* Needed for clk_hw_get_clk() */ #include "clk.h"

+#include <kunit/clk.h> +#include <kunit/of.h> +#include <kunit/platform_device.h> #include <kunit/test.h>

+#include "clk_parent_data_test.h" + static const struct clk_ops empty_clk_ops = { };

#define DUMMY_CLOCK_INIT_RATE (42 * 1000 * 1000) @@ -2659,6 +2666,448 @@ static struct kunit_suite clk_mux_no_reparent_test_suite = { .test_cases = clk_mux_no_reparent_test_cases, };

+struct clk_register_clk_parent_data_test_case { + const char *desc; + struct clk_parent_data pdata; +}; + +static void +clk_register_clk_parent_data_test_case_to_desc( + const struct clk_register_clk_parent_data_test_case *t, char *desc) +{ + strcpy(desc, t->desc); +} + +static const struct clk_register_clk_parent_data_test_case +clk_register_clk_parent_data_of_cases[] = { + { + /* + * Test that a clk registered with a struct device_node can + * find a parent based on struct clk_parent_data::index. + */ + .desc = "clk_parent_data_of_index_test", + .pdata.index = 0, + }, + { + /* + * Test that a clk registered with a struct device_node can + * find a parent based on struct clk_parent_data::fwname. + */ + .desc = "clk_parent_data_of_fwname_test", + .pdata.fw_name = CLK_PARENT_DATA_PARENT1, + }, + { + /* + * Test that a clk registered with a struct device_node can + * find a parent based on struct clk_parent_data::name. + */ + .desc = "clk_parent_data_of_name_test", + /* The index must be negative to indicate firmware not used */ + .pdata.index = -1, + .pdata.name = CLK_PARENT_DATA_1MHZ_NAME, + }, + { + /* + * Test that a clk registered with a struct device_node can + * find a parent based on struct + * clk_parent_data::{fw_name,name}. + */ + .desc = "clk_parent_data_of_fwname_name_test", + .pdata.fw_name = CLK_PARENT_DATA_PARENT1, + .pdata.name = "not_matching", + }, + { + /* + * Test that a clk registered with a struct device_node can + * find a parent based on struct clk_parent_data::{index,name}. + * Index takes priority. + */ + .desc = "clk_parent_data_of_index_name_priority_test", + .pdata.index = 0, + .pdata.name = "not_matching", + }, + { + /* + * Test that a clk registered with a struct device_node can + * find a parent based on struct + * clk_parent_data::{index,fwname,name}. The fw_name takes + * priority over index and name. + */ + .desc = "clk_parent_data_of_index_fwname_name_priority_test", + .pdata.index = 1, + .pdata.fw_name = CLK_PARENT_DATA_PARENT1, + .pdata.name = "not_matching", + }, +}; + +KUNIT_ARRAY_PARAM(clk_register_clk_parent_data_of_test, clk_register_clk_parent_data_of_cases, + clk_register_clk_parent_data_test_case_to_desc) + +/** + * struct clk_register_clk_parent_data_of_ctx - Context for clk_parent_data OF tests + * @np: device node of clk under test + * @hw: clk_hw for clk under test + */ +struct clk_register_clk_parent_data_of_ctx { + struct device_node *np; + struct clk_hw hw; +}; + +static int clk_register_clk_parent_data_of_test_init(struct kunit *test) +{ + struct clk_register_clk_parent_data_of_ctx *ctx; + + KUNIT_ASSERT_EQ(test, 0, + of_overlay_apply_kunit(test, kunit_clk_parent_data_test)); + + ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + test->priv = ctx; + + ctx->np = of_find_compatible_node(NULL, NULL, "test,clk-parent-data"); + if (!ctx->np) + return -ENODEV; + + of_node_put_kunit(test, ctx->np); + + return 0; +} + +/* + * Test that a clk registered with a struct device_node can find a parent based on + * struct clk_parent_data when the hw member isn't set. + */ +static void clk_register_clk_parent_data_of_test(struct kunit *test) +{ + struct clk_register_clk_parent_data_of_ctx *ctx = test->priv; + struct clk_hw *parent_hw; + const struct clk_register_clk_parent_data_test_case *test_param; + struct clk_init_data init = { }; + struct clk *expected_parent, *actual_parent; + + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx->np); + + expected_parent = of_clk_get_kunit(test, ctx->np, 0); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, expected_parent); + + test_param = test->param_value; + init.parent_data = &test_param->pdata; + init.num_parents = 1; + init.name = "parent_data_of_test_clk"; + init.ops = &clk_dummy_single_parent_ops; + ctx->hw.init = &init; + KUNIT_ASSERT_EQ(test, 0, of_clk_hw_register_kunit(test, ctx->np, &ctx->hw)); + + parent_hw = clk_hw_get_parent(&ctx->hw); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent_hw); + + actual_parent = clk_hw_get_clk_kunit(test, parent_hw, __func__); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, actual_parent); + + KUNIT_EXPECT_TRUE(test, clk_is_match(expected_parent, actual_parent)); +} + +static struct kunit_case clk_register_clk_parent_data_of_test_cases[] = { + KUNIT_CASE_PARAM(clk_register_clk_parent_data_of_test, + clk_register_clk_parent_data_of_test_gen_params), + {} +}; + +/* + * Test suite for registering clks with struct clk_parent_data and a struct + * device_node. + */ +static struct kunit_suite clk_register_clk_parent_data_of_suite = { + .name = "clk_register_clk_parent_data_of", + .init = clk_register_clk_parent_data_of_test_init, + .test_cases = clk_register_clk_parent_data_of_test_cases, +}; + +/** + * struct clk_register_clk_parent_data_device_ctx - Context for clk_parent_data device tests + * @dev: device of clk under test + * @hw: clk_hw for clk under test + * @pdrv: driver to attach to find @dev + */ +struct clk_register_clk_parent_data_device_ctx { + struct device *dev; + struct clk_hw hw; + struct platform_driver pdrv; +}; + +static inline struct clk_register_clk_parent_data_device_ctx * +clk_register_clk_parent_data_driver_to_test_context(struct platform_device *pdev) +{ + return container_of(to_platform_driver(pdev->dev.driver), + struct clk_register_clk_parent_data_device_ctx, pdrv); +} + +static int clk_register_clk_parent_data_device_probe(struct platform_device *pdev) +{ + struct clk_register_clk_parent_data_device_ctx *ctx; + + ctx = clk_register_clk_parent_data_driver_to_test_context(pdev); + ctx->dev = &pdev->dev; + + return 0; +} + +static void clk_register_clk_parent_data_device_driver(struct kunit *test) +{ + struct clk_register_clk_parent_data_device_ctx *ctx = test->priv; + static const struct of_device_id match_table[] = { + { .compatible = "test,clk-parent-data" }, + { } + }; + + ctx->pdrv.probe = clk_register_clk_parent_data_device_probe; + ctx->pdrv.driver.of_match_table = match_table; + ctx->pdrv.driver.name = __func__; + ctx->pdrv.driver.owner = THIS_MODULE; + + KUNIT_ASSERT_EQ(test, 0, kunit_platform_driver_register(test, &ctx->pdrv)); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx->dev); +} + +static const struct clk_register_clk_parent_data_test_case +clk_register_clk_parent_data_device_cases[] = { + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::index. + */ + .desc = "clk_parent_data_device_index_test", + .pdata.index = 1, + }, + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::fwname. + */ + .desc = "clk_parent_data_device_fwname_test", + .pdata.fw_name = CLK_PARENT_DATA_PARENT2, + }, + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::name. + */ + .desc = "clk_parent_data_device_name_test", + /* The index must be negative to indicate firmware not used */ + .pdata.index = -1, + .pdata.name = CLK_PARENT_DATA_50MHZ_NAME, + }, + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::{fw_name,name}. + */ + .desc = "clk_parent_data_device_fwname_name_test", + .pdata.fw_name = CLK_PARENT_DATA_PARENT2, + .pdata.name = "not_matching", + }, + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::{index,name}. Index + * takes priority. + */ + .desc = "clk_parent_data_device_index_name_priority_test", + .pdata.index = 1, + .pdata.name = "not_matching", + }, + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::{index,fwname,name}. + * The fw_name takes priority over index and name. + */ + .desc = "clk_parent_data_device_index_fwname_name_priority_test", + .pdata.index = 0, + .pdata.fw_name = CLK_PARENT_DATA_PARENT2, + .pdata.name = "not_matching", + }, +}; + +KUNIT_ARRAY_PARAM(clk_register_clk_parent_data_device_test, + clk_register_clk_parent_data_device_cases, + clk_register_clk_parent_data_test_case_to_desc) + +/* + * Test that a clk registered with a struct device can find a parent based on + * struct clk_parent_data when the hw member isn't set. + */ +static void clk_register_clk_parent_data_device_test(struct kunit *test) +{ + struct clk_register_clk_parent_data_device_ctx *ctx; + const struct clk_register_clk_parent_data_test_case *test_param; + struct clk_hw *parent_hw; + struct clk_init_data init = { }; + struct clk *expected_parent, *actual_parent; + + ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx); + test->priv = ctx; + + clk_register_clk_parent_data_device_driver(test); + + expected_parent = clk_get_kunit(test, ctx->dev, "50"); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, expected_parent); + + test_param = test->param_value; + init.parent_data = &test_param->pdata; + init.num_parents = 1; + init.name = "parent_data_device_test_clk"; + init.ops = &clk_dummy_single_parent_ops; + ctx->hw.init = &init; + KUNIT_ASSERT_EQ(test, 0, clk_hw_register_kunit(test, ctx->dev, &ctx->hw)); + + parent_hw = clk_hw_get_parent(&ctx->hw); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent_hw); + + actual_parent = clk_hw_get_clk_kunit(test, parent_hw, __func__); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, actual_parent); + + KUNIT_EXPECT_TRUE(test, clk_is_match(expected_parent, actual_parent)); +} + +static const struct clk_register_clk_parent_data_test_case +clk_register_clk_parent_data_device_hw_cases[] = { + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::hw. + */ + .desc = "clk_parent_data_device_hw_index_test", + /* The index must be negative to indicate firmware not used */ + .pdata.index = -1, + }, + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::hw when + * struct clk_parent_data::fw_name is set. + */ + .desc = "clk_parent_data_device_hw_fwname_test", + .pdata.fw_name = CLK_PARENT_DATA_PARENT2, + }, + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::hw when struct + * clk_parent_data::name is set. + */ + .desc = "clk_parent_data_device_hw_name_test", + /* The index must be negative to indicate firmware not used */ + .pdata.index = -1, + .pdata.name = CLK_PARENT_DATA_50MHZ_NAME, + }, + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::hw when struct + * clk_parent_data::{fw_name,name} are set. + */ + .desc = "clk_parent_data_device_hw_fwname_name_test", + .pdata.fw_name = CLK_PARENT_DATA_PARENT2, + .pdata.name = "not_matching", + }, + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::hw when struct + * clk_parent_data::index is set. The hw pointer takes + * priority. + */ + .desc = "clk_parent_data_device_hw_index_priority_test", + .pdata.index = 0, + }, + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::hw when + * struct clk_parent_data::{index,fwname,name} are set. + * The hw pointer takes priority over everything else. + */ + .desc = "clk_parent_data_device_hw_index_fwname_name_priority_test", + .pdata.index = 0, + .pdata.fw_name = CLK_PARENT_DATA_PARENT2, + .pdata.name = "not_matching", + }, +}; + +KUNIT_ARRAY_PARAM(clk_register_clk_parent_data_device_hw_test, + clk_register_clk_parent_data_device_hw_cases, + clk_register_clk_parent_data_test_case_to_desc) + +/* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::hw. + */ +static void clk_register_clk_parent_data_device_hw_test(struct kunit *test) +{ + struct clk_register_clk_parent_data_device_ctx *ctx; + const struct clk_register_clk_parent_data_test_case *test_param; + struct clk_dummy_context *parent; + struct clk_hw *parent_hw; + struct clk_parent_data pdata = { }; + struct clk_init_data init = { }; + + ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx); + test->priv = ctx; + + clk_register_clk_parent_data_device_driver(test); + + parent = kunit_kzalloc(test, sizeof(*parent), GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent); + + parent_hw = &parent->hw; + parent_hw->init = CLK_HW_INIT_NO_PARENT("parent-clk", + &clk_dummy_rate_ops, 0); + + KUNIT_ASSERT_EQ(test, 0, clk_hw_register_kunit(test, ctx->dev, parent_hw)); + + test_param = test->param_value; + memcpy(&pdata, &test_param->pdata, sizeof(pdata)); + pdata.hw = parent_hw; + init.parent_data = &pdata; + init.num_parents = 1; + init.ops = &clk_dummy_single_parent_ops; + init.name = "parent_data_device_hw_test_clk"; + ctx->hw.init = &init; + KUNIT_ASSERT_EQ(test, 0, clk_hw_register_kunit(test, ctx->dev, &ctx->hw)); + + KUNIT_EXPECT_PTR_EQ(test, parent_hw, clk_hw_get_parent(&ctx->hw)); +} + +static struct kunit_case clk_register_clk_parent_data_device_test_cases[] = { + KUNIT_CASE_PARAM(clk_register_clk_parent_data_device_test, + clk_register_clk_parent_data_device_test_gen_params), + KUNIT_CASE_PARAM(clk_register_clk_parent_data_device_hw_test, + clk_register_clk_parent_data_device_hw_test_gen_params), + {} +}; + +static int clk_register_clk_parent_data_device_init(struct kunit *test) +{ + KUNIT_ASSERT_EQ(test, 0, + of_overlay_apply_kunit(test, kunit_clk_parent_data_test)); + + return 0; +} + +/* + * Test suite for registering clks with struct clk_parent_data and a struct + * device. + */ +static struct kunit_suite clk_register_clk_parent_data_device_suite = { + .name = "clk_register_clk_parent_data_device", + .init = clk_register_clk_parent_data_device_init, + .test_cases = clk_register_clk_parent_data_device_test_cases, +}; + kunit_test_suites( &clk_leaf_mux_set_rate_parent_test_suite, &clk_test_suite, @@ -2671,7 +3120,9 @@ kunit_test_suites( &clk_range_test_suite, &clk_range_maximize_test_suite, &clk_range_minimize_test_suite, + &clk_register_clk_parent_data_of_suite, + &clk_register_clk_parent_data_device_suite, &clk_single_parent_mux_test_suite, - &clk_uncached_test_suite + &clk_uncached_test_suite, ); MODULE_LICENSE("GPL v2"); diff --git a/drivers/clk/kunit_clk_parent_data_test.dtso b/drivers/clk/kunit_clk_parent_data_test.dtso new file mode 100644 index 000000000000..7d3ed9a5a2e8 --- /dev/null +++ b/drivers/clk/kunit_clk_parent_data_test.dtso @@ -0,0 +1,28 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +/plugin/; + +#include "clk_parent_data_test.h" + +&{/} { + fixed_50: kunit-clock-50MHz { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <50000000>; + clock-output-names = CLK_PARENT_DATA_50MHZ_NAME; + }; + + fixed_parent: kunit-clock-1MHz { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <1000000>; + clock-output-names = CLK_PARENT_DATA_1MHZ_NAME; + }; + + kunit-clock-controller { + compatible = "test,clk-parent-data"; + clocks = <&fixed_parent>, <&fixed_50>; + clock-names = CLK_PARENT_DATA_PARENT1, CLK_PARENT_DATA_PARENT2; + #clock-cells = <1>; + }; +};