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Edit file: /usr/src/kernels/5.14.0-611.27.1.el9_7.x86_64/include/kunit/device.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * KUnit basic device implementation
 *
 * Helpers for creating and managing fake devices for KUnit tests.
 *
 * Copyright (C) 2023, Google LLC.
 * Author: David Gow <davidgow@google.com>
 */

#ifndef _KUNIT_DEVICE_H
#define _KUNIT_DEVICE_H

#if IS_ENABLED(CONFIG_KUNIT)

#include <kunit/test.h>

struct device;
struct device_driver;

/**
 * kunit_driver_create() - Create a struct device_driver attached to the kunit_bus
 * @test: The test context object.
 * @name: The name to give the created driver.
 *
 * Creates a struct device_driver attached to the kunit_bus, with the name @name.
 * This driver will automatically be cleaned up on test exit.
 *
 * Return: a stub struct device_driver, managed by KUnit, with the name @name.
 */
struct device_driver *kunit_driver_create(struct kunit *test, const char *name);

/**
 * kunit_device_register() - Create a struct device for use in KUnit tests
 * @test: The test context object.
 * @name: The name to give the created device.
 *
 * Creates a struct kunit_device (which is a struct device) with the given name,
 * and a corresponding driver. The device and driver will be cleaned up on test
 * exit, or when kunit_device_unregister is called. See also
 * kunit_device_register_with_driver, if you wish to provide your own
 * struct device_driver.
 *
 * Return: a pointer to a struct device which will be cleaned up when the test
 * exits, or an error pointer if the device could not be allocated or registered.
 */
struct device *kunit_device_register(struct kunit *test, const char *name);

/**
 * kunit_device_register_with_driver() - Create a struct device for use in KUnit tests
 * @test: The test context object.
 * @name: The name to give the created device.
 * @drv: The struct device_driver to associate with the device.
 *
 * Creates a struct kunit_device (which is a struct device) with the given
 * name, and driver. The device will be cleaned up on test exit, or when
 * kunit_device_unregister is called. See also kunit_device_register, if you
 * wish KUnit to create and manage a driver for you.
 *
 * Return: a pointer to a struct device which will be cleaned up when the test
 * exits, or an error pointer if the device could not be allocated or registered.
 */
struct device *kunit_device_register_with_driver(struct kunit *test,
						 const char *name,
						 const struct device_driver *drv);

/**
 * kunit_device_unregister() - Unregister a KUnit-managed device
 * @test: The test context object which created the device
 * @dev: The device.
 *
 * Unregisters and destroys a struct device which was created with
 * kunit_device_register or kunit_device_register_with_driver. If KUnit created
 * a driver, cleans it up as well.
 */
void kunit_device_unregister(struct kunit *test, struct device *dev);

#endif

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