1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
2 // Copyright(c) 2015-17 Intel Corporation.
11 static void sdw_slave_release(struct device *dev)  in sdw_slave_release()  argument
13 	struct sdw_slave *slave = dev_to_sdw_dev(dev);  in sdw_slave_release()  local
15 	of_node_put(slave->dev.of_node);  in sdw_slave_release()
16 	mutex_destroy(&slave->sdw_dev_lock);  in sdw_slave_release()
17 	kfree(slave);  in sdw_slave_release()
29 	struct sdw_slave *slave;  in sdw_slave_add()  local
33 	slave = kzalloc(sizeof(*slave), GFP_KERNEL);  in sdw_slave_add()
34 	if (!slave)  in sdw_slave_add()
35 		return -ENOMEM;  in sdw_slave_add()
38 	memcpy(&slave->id, id, sizeof(*id));  in sdw_slave_add()
39 	slave->dev.parent = bus->dev;  in sdw_slave_add()
40 	slave->dev.fwnode = fwnode;  in sdw_slave_add()
42 	if (id->unique_id == SDW_IGNORED_UNIQUE_ID) {  in sdw_slave_add()
44 		dev_set_name(&slave->dev, "sdw:%01x:%01x:%04x:%04x:%02x",  in sdw_slave_add()
45 			     bus->controller_id, bus->link_id, id->mfg_id, id->part_id,  in sdw_slave_add()
46 			     id->class_id);  in sdw_slave_add()
49 		dev_set_name(&slave->dev, "sdw:%01x:%01x:%04x:%04x:%02x:%01x",  in sdw_slave_add()
50 			     bus->controller_id, bus->link_id, id->mfg_id, id->part_id,  in sdw_slave_add()
51 			     id->class_id, id->unique_id);  in sdw_slave_add()
54 	slave->dev.bus = &sdw_bus_type;  in sdw_slave_add()
55 	slave->dev.of_node = of_node_get(to_of_node(fwnode));  in sdw_slave_add()
56 	slave->dev.type = &sdw_slave_type;  in sdw_slave_add()
57 	slave->dev.groups = sdw_slave_status_attr_groups;  in sdw_slave_add()
58 	slave->bus = bus;  in sdw_slave_add()
59 	slave->status = SDW_SLAVE_UNATTACHED;  in sdw_slave_add()
60 	init_completion(&slave->enumeration_complete);  in sdw_slave_add()
61 	init_completion(&slave->initialization_complete);  in sdw_slave_add()
62 	slave->dev_num = 0;  in sdw_slave_add()
63 	slave->probed = false;  in sdw_slave_add()
64 	slave->first_interrupt_done = false;  in sdw_slave_add()
65 	mutex_init(&slave->sdw_dev_lock);  in sdw_slave_add()
68 		init_completion(&slave->port_ready[i]);  in sdw_slave_add()
70 	mutex_lock(&bus->bus_lock);  in sdw_slave_add()
71 	list_add_tail(&slave->node, &bus->slaves);  in sdw_slave_add()
72 	mutex_unlock(&bus->bus_lock);  in sdw_slave_add()
74 	ret = device_register(&slave->dev);  in sdw_slave_add()
76 		dev_err(bus->dev, "Failed to add slave: ret %d\n", ret);  in sdw_slave_add()
82 		mutex_lock(&bus->bus_lock);  in sdw_slave_add()
83 		list_del(&slave->node);  in sdw_slave_add()
84 		mutex_unlock(&bus->bus_lock);  in sdw_slave_add()
85 		put_device(&slave->dev);  in sdw_slave_add()
89 	sdw_slave_debugfs_init(slave);  in sdw_slave_add()
105 	status = acpi_evaluate_integer(adev->handle,  in find_slave()
109 		dev_err(bus->dev, "_ADR resolution failed: %x\n",  in find_slave()
114 	if (bus->ops->override_adr)  in find_slave()
115 		addr = bus->ops->override_adr(bus, addr);  in find_slave()
124 	if (link_id != bus->link_id)  in find_slave()
142 	struct sdw_bus *bus = cwd->bus;  in sdw_acpi_check_duplicate()
145 	if (adev == cwd->adev)  in sdw_acpi_check_duplicate()
151 	if (cwd->id.sdw_version != id.sdw_version || cwd->id.mfg_id != id.mfg_id ||  in sdw_acpi_check_duplicate()
152 	    cwd->id.part_id != id.part_id || cwd->id.class_id != id.class_id)  in sdw_acpi_check_duplicate()
155 	if (cwd->id.unique_id != id.unique_id) {  in sdw_acpi_check_duplicate()
156 		dev_dbg(bus->dev,  in sdw_acpi_check_duplicate()
157 			"Valid unique IDs 0x%x 0x%x for Slave mfg_id 0x%04x, part_id 0x%04x\n",  in sdw_acpi_check_duplicate()
158 			cwd->id.unique_id, id.unique_id, cwd->id.mfg_id,  in sdw_acpi_check_duplicate()
159 			cwd->id.part_id);  in sdw_acpi_check_duplicate()
160 		cwd->ignore_unique_id = false;  in sdw_acpi_check_duplicate()
164 	dev_err(bus->dev,  in sdw_acpi_check_duplicate()
165 		"Invalid unique IDs 0x%x 0x%x for Slave mfg_id 0x%04x, part_id 0x%04x\n",  in sdw_acpi_check_duplicate()
166 		cwd->id.unique_id, id.unique_id, cwd->id.mfg_id, cwd->id.part_id);  in sdw_acpi_check_duplicate()
167 	return -ENODEV;  in sdw_acpi_check_duplicate()
183 	/* Brute-force O(N^2) search for duplicates. */  in sdw_acpi_find_one()
184 	ret = acpi_dev_for_each_child(ACPI_COMPANION(bus->dev),  in sdw_acpi_find_one()
198  * sdw_acpi_find_slaves() - Find Slave devices in Master ACPI node
201  * Scans Master ACPI node for SDW child Slave devices and registers it.
207 	parent = ACPI_COMPANION(bus->dev);  in sdw_acpi_find_slaves()
209 		dev_err(bus->dev, "Can't find parent for acpi bind\n");  in sdw_acpi_find_slaves()
210 		return -ENODEV;  in sdw_acpi_find_slaves()
219  * sdw_of_find_slaves() - Find Slave devices in master device tree node
222  * Scans Master DT node for SDW child Slave devices and registers it.
226 	struct device *dev = bus->dev;  in sdw_of_find_slaves()  local
229 	for_each_child_of_node(bus->dev->of_node, node) {  in sdw_of_find_slaves()
244 			dev_err(dev, "Invalid compatible string found %s\n",  in sdw_of_find_slaves()
251 			dev_err(dev, "Invalid Link and Instance ID\n");  in sdw_of_find_slaves()
260 		if (link_id != bus->link_id)  in sdw_of_find_slaves()