1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Linux I2C core OF support code
11 #include <dt-bindings/i2c/i2c.h>
14 #include <linux/i2c.h>
20 #include "i2c-core.h"
30 	if (of_alias_from_compatible(node, info->type, sizeof(info->type)) < 0) {  in of_i2c_get_board_info()
32 		return -EINVAL;  in of_i2c_get_board_info()
43 		info->flags |= I2C_CLIENT_TEN;  in of_i2c_get_board_info()
48 		info->flags |= I2C_CLIENT_SLAVE;  in of_i2c_get_board_info()
51 	info->addr = addr;  in of_i2c_get_board_info()
52 	info->of_node = node;  in of_i2c_get_board_info()
53 	info->fwnode = of_fwnode_handle(node);  in of_i2c_get_board_info()
55 	if (of_property_read_bool(node, "host-notify"))  in of_i2c_get_board_info()
56 		info->flags |= I2C_CLIENT_HOST_NOTIFY;  in of_i2c_get_board_info()
58 	if (of_property_read_bool(node, "wakeup-source"))  in of_i2c_get_board_info()
59 		info->flags |= I2C_CLIENT_WAKE;  in of_i2c_get_board_info()
72 	dev_dbg(&adap->dev, "of_i2c: register %pOF\n", node);  in of_i2c_register_device()
74 	ret = of_i2c_get_board_info(&adap->dev, node, &info);  in of_i2c_register_device()
80 		dev_err(&adap->dev, "of_i2c: Failure registering %pOF\n", node);  in of_i2c_register_device()
87 	struct device_node *bus, *node;  in of_i2c_register_devices()  local
91 	if (!adap->dev.of_node)  in of_i2c_register_devices()
94 	dev_dbg(&adap->dev, "of_i2c: walking child nodes\n");  in of_i2c_register_devices()
96 	bus = of_get_child_by_name(adap->dev.of_node, "i2c-bus");  in of_i2c_register_devices()
97 	if (!bus)  in of_i2c_register_devices()
98 		bus = of_node_get(adap->dev.of_node);  in of_i2c_register_devices()
100 	for_each_available_child_of_node(bus, node) {  in of_i2c_register_devices()
106 			dev_err(&adap->dev,  in of_i2c_register_devices()
107 				 "Failed to create I2C device for %pOF\n",  in of_i2c_register_devices()
113 	of_node_put(bus);  in of_i2c_register_devices()
120 	const char *name;  in i2c_of_match_device_sysfs()  local
122 	for (; matches->compatible[0]; matches++) {  in i2c_of_match_device_sysfs()
124 		 * Adding devices through the i2c sysfs interface provides us  in i2c_of_match_device_sysfs()
129 		if (sysfs_streq(client->name, matches->compatible))  in i2c_of_match_device_sysfs()
132 		name = strchr(matches->compatible, ',');  in i2c_of_match_device_sysfs()
133 		if (!name)  in i2c_of_match_device_sysfs()
134 			name = matches->compatible;  in i2c_of_match_device_sysfs()
136 			name++;  in i2c_of_match_device_sysfs()
138 		if (sysfs_streq(client->name, name))  in i2c_of_match_device_sysfs()
154 	match = of_match_device(matches, &client->dev);  in i2c_of_match_device()
172 		adap = of_find_i2c_adapter_by_node(rd->dn->parent);  in of_i2c_notify()
176 		if (of_node_test_and_set_flag(rd->dn, OF_POPULATED)) {  in of_i2c_notify()
177 			put_device(&adap->dev);  in of_i2c_notify()
185 		rd->dn->fwnode.flags &= ~FWNODE_FLAG_NOT_DEVICE;  in of_i2c_notify()
186 		client = of_i2c_register_device(adap, rd->dn);  in of_i2c_notify()
188 			dev_err(&adap->dev, "failed to create client for '%pOF'\n",  in of_i2c_notify()
189 				 rd->dn);  in of_i2c_notify()
190 			put_device(&adap->dev);  in of_i2c_notify()
191 			of_node_clear_flag(rd->dn, OF_POPULATED);  in of_i2c_notify()
194 		put_device(&adap->dev);  in of_i2c_notify()
198 		if (!of_node_check_flag(rd->dn, OF_POPULATED))  in of_i2c_notify()
202 		client = of_find_i2c_device_by_node(rd->dn);  in of_i2c_notify()
210 		put_device(&client->dev);  in of_i2c_notify()