1 // SPDX-License-Identifier: GPL-2.0
9  * instantiates a dummy I2C client at the second I2C address to report
18  * The chip supports reading per-phase temperatures and per-phase input/output
21  * register values and reports per-phase information in PMBus page 0.
49 	enum chips id;  member
57 static int max16601_read_byte(struct i2c_client *client, int page, int reg)  in max16601_read_byte()  argument
59 	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);  in max16601_read_byte()
64 			return i2c_smbus_read_byte_data(data->vsa, reg);  in max16601_read_byte()
65 		return -EOPNOTSUPP;  in max16601_read_byte()
67 	return -ENODATA;  in max16601_read_byte()
70 static int max16601_read_word(struct i2c_client *client, int page, int phase,  in max16601_read_word()  argument
73 	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);  in max16601_read_word()
81 			return -ENODATA;  in max16601_read_word()
86 			ret = i2c_smbus_write_byte_data(client, REG_PHASE_ID,  in max16601_read_word()
90 			ret = i2c_smbus_read_block_data(client,  in max16601_read_word()
96 				return -EIO;  in max16601_read_word()
108 		return -EOPNOTSUPP;  in max16601_read_word()
112 			return i2c_smbus_read_word_data(client, REG_IIN_SENSOR);  in max16601_read_word()
114 			return i2c_smbus_read_word_data(client,  in max16601_read_word()
119 		return -EOPNOTSUPP;  in max16601_read_word()
123 			ret = i2c_smbus_read_word_data(data->vsa,  in max16601_read_word()
128 			    sign_extend32(data->iout_avg_pkg, 10))  in max16601_read_word()
129 				data->iout_avg_pkg = ret;  in max16601_read_word()
130 			return data->iout_avg_pkg;  in max16601_read_word()
141 			return i2c_smbus_read_word_data(data->vsa, reg);  in max16601_read_word()
143 			return -EOPNOTSUPP;  in max16601_read_word()
146 		return -EOPNOTSUPP;  in max16601_read_word()
150 static int max16601_write_byte(struct i2c_client *client, int page, u8 reg)  in max16601_write_byte()  argument
152 	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);  in max16601_write_byte()
157 			return i2c_smbus_write_byte(data->vsa, reg);  in max16601_write_byte()
158 		return -EOPNOTSUPP;  in max16601_write_byte()
160 	return -ENODATA;  in max16601_write_byte()
163 static int max16601_write_word(struct i2c_client *client, int page, int reg,  in max16601_write_word()  argument
166 	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);  in max16601_write_word()
171 		return -ENODATA;  in max16601_write_word()
174 		return -EOPNOTSUPP;  in max16601_write_word()
178 			data->iout_avg_pkg = 0xfc00;  in max16601_write_word()
184 			return i2c_smbus_write_word_data(data->vsa, reg, value);  in max16601_write_word()
186 			return -EOPNOTSUPP;  in max16601_write_word()
191 static int max16601_identify(struct i2c_client *client,  in max16601_identify()  argument
197 	reg = i2c_smbus_read_byte_data(client, REG_SETPT_DVID);  in max16601_identify()
201 		info->vrm_version[0] = vr13;  in max16601_identify()
203 		info->vrm_version[0] = vr12;  in max16601_identify()
205 	if (data->id != max16601)  in max16601_identify()
208 	reg = i2c_smbus_read_byte_data(client, REG_DEFAULT_NUM_POP);  in max16601_identify()
218 		info->phases[0] = reg;  in max16601_identify()
261 	i2c_unregister_device(data->vsa);  in max16601_remove()
271 static int max16601_get_id(struct i2c_client *client)  in max16601_get_id()  argument
273 	struct device *dev = &client->dev;  in max16601_get_id()
275 	enum chips id;  in max16601_get_id()  local
278 	ret = i2c_smbus_read_block_data(client, PMBUS_IC_DEVICE_ID, buf);  in max16601_get_id()
280 		return -ENODEV;  in max16601_get_id()
287 		id = max16508;  in max16601_get_id()
289 		id = max16601;  in max16601_get_id()
293 		return -ENODEV;  in max16601_get_id()
295 	return id;  in max16601_get_id()
298 static int max16601_probe(struct i2c_client *client)  in max16601_probe()  argument
300 	struct device *dev = &client->dev;  in max16601_probe()
301 	const struct i2c_device_id *id;  in max16601_probe()  local
305 	if (!i2c_check_functionality(client->adapter,  in max16601_probe()
308 		return -ENODEV;  in max16601_probe()
310 	chip_id = max16601_get_id(client);  in max16601_probe()
314 	id = i2c_match_id(max16601_id, client);  in max16601_probe()
315 	if (chip_id != id->driver_data)  in max16601_probe()
316 		dev_warn(&client->dev,  in max16601_probe()
318 			 id->name, (int) id->driver_data, chip_id);  in max16601_probe()
320 	ret = i2c_smbus_read_byte_data(client, REG_PHASE_ID);  in max16601_probe()
326 		return -ENODEV;  in max16601_probe()
331 		return -ENOMEM;  in max16601_probe()
333 	data->id = chip_id;  in max16601_probe()
334 	data->iout_avg_pkg = 0xfc00;  in max16601_probe()
335 	data->vsa = i2c_new_dummy_device(client->adapter, client->addr + 1);  in max16601_probe()
336 	if (IS_ERR(data->vsa)) {  in max16601_probe()
337 		dev_err(dev, "Failed to register VSA client\n");  in max16601_probe()
338 		return PTR_ERR(data->vsa);  in max16601_probe()
344 	data->info = max16601_info;  in max16601_probe()
346 	return pmbus_do_probe(client, &data->info);  in max16601_probe()
359 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");