1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright (c) 2018-2021 Intel Corporation
10 #include <linux/peci.h>
21 	struct peci_controller *controller = to_peci_controller(dev);  in peci_controller_dev_release()  local
23 	mutex_destroy(&controller->bus_lock);  in peci_controller_dev_release()
24 	ida_free(&peci_controller_ida, controller->id);  in peci_controller_dev_release()
25 	kfree(controller);  in peci_controller_dev_release()
32 int peci_controller_scan_devices(struct peci_controller *controller)  in peci_controller_scan_devices()  argument
38 		ret = peci_device_create(controller, addr);  in peci_controller_scan_devices()
49 	struct peci_controller *controller;  in peci_controller_alloc()  local
52 	if (!ops->xfer)  in peci_controller_alloc()
53 		return ERR_PTR(-EINVAL);  in peci_controller_alloc()
55 	controller = kzalloc(sizeof(*controller), GFP_KERNEL);  in peci_controller_alloc()
56 	if (!controller)  in peci_controller_alloc()
57 		return ERR_PTR(-ENOMEM);  in peci_controller_alloc()
62 	controller->id = ret;  in peci_controller_alloc()
64 	controller->ops = ops;  in peci_controller_alloc()
66 	controller->dev.parent = dev;  in peci_controller_alloc()
67 	controller->dev.bus = &peci_bus_type;  in peci_controller_alloc()
68 	controller->dev.type = &peci_controller_type;  in peci_controller_alloc()
70 	device_initialize(&controller->dev);  in peci_controller_alloc()
72 	mutex_init(&controller->bus_lock);  in peci_controller_alloc()
74 	return controller;  in peci_controller_alloc()
77 	kfree(controller);  in peci_controller_alloc()
90 	struct peci_controller *controller = _controller;  in unregister_controller()  local
93 	 * Detach any active PECI devices. This can't fail, thus we do not  in unregister_controller()
96 	device_for_each_child_reverse(&controller->dev, NULL, unregister_child);  in unregister_controller()
98 	device_unregister(&controller->dev);  in unregister_controller()
100 	fwnode_handle_put(controller->dev.fwnode);  in unregister_controller()
102 	pm_runtime_disable(&controller->dev);  in unregister_controller()
106  * devm_peci_controller_add() - add PECI controller
108  * @ops: pointer to controller specific methods
111  * devm_peci_controller_add() to register itself with the PECI bus.
113  * Return: Pointer to the newly allocated controller or ERR_PTR() in case of failure.
118 	struct peci_controller *controller;  in devm_peci_controller_add()  local
121 	controller = peci_controller_alloc(dev, ops);  in devm_peci_controller_add()
122 	if (IS_ERR(controller))  in devm_peci_controller_add()
123 		return controller;  in devm_peci_controller_add()
125 	ret = dev_set_name(&controller->dev, "peci-%d", controller->id);  in devm_peci_controller_add()
129 	pm_runtime_no_callbacks(&controller->dev);  in devm_peci_controller_add()
130 	pm_suspend_ignore_children(&controller->dev, true);  in devm_peci_controller_add()
131 	pm_runtime_enable(&controller->dev);  in devm_peci_controller_add()
133 	device_set_node(&controller->dev, fwnode_handle_get(dev_fwnode(dev)));  in devm_peci_controller_add()
135 	ret = device_add(&controller->dev);  in devm_peci_controller_add()
139 	ret = devm_add_action_or_reset(dev, unregister_controller, controller);  in devm_peci_controller_add()
144 	 * Ignoring retval since failures during scan are non-critical for  in devm_peci_controller_add()
145 	 * controller itself.  in devm_peci_controller_add()
147 	peci_controller_scan_devices(controller);  in devm_peci_controller_add()
149 	return controller;  in devm_peci_controller_add()
152 	fwnode_handle_put(controller->dev.fwnode);  in devm_peci_controller_add()
154 	pm_runtime_disable(&controller->dev);  in devm_peci_controller_add()
157 	put_device(&controller->dev);  in devm_peci_controller_add()
161 EXPORT_SYMBOL_NS_GPL(devm_peci_controller_add, "PECI");
166 	while (id->x86_vfm != 0) {  in peci_bus_match_device_id()
167 		if (id->x86_vfm == device->info.x86_vfm)  in peci_bus_match_device_id()
180 	if (dev->type != &peci_device_type)  in peci_bus_device_match()
183 	return !!peci_bus_match_device_id(peci_drv->id_table, device);  in peci_bus_device_match()
189 	struct peci_driver *driver = to_peci_driver(dev->driver);  in peci_bus_device_probe()
191 	return driver->probe(device, peci_bus_match_device_id(driver->id_table, device));  in peci_bus_device_probe()
197 	struct peci_driver *driver = to_peci_driver(dev->driver);  in peci_bus_device_remove()
199 	if (driver->remove)  in peci_bus_device_remove()
200 		driver->remove(device);  in peci_bus_device_remove()
204 	.name		= "peci",
217 		pr_err("peci: failed to register PECI bus type!\n");  in peci_init()
234 MODULE_DESCRIPTION("PECI bus core module");