1 // SPDX-License-Identifier: GPL-2.0
10  * instantiates a dummy I2C client at the second I2C address to report
19  * The chip supports reading per-phase temperatures and per-phase input/output
22  * register values and reports per-phase information in PMBus page 0.
50 	enum chips id;  member
58 static int max16601_read_byte(struct i2c_client *client, int page, int reg)  in max16601_read_byte()  argument
60 	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);  in max16601_read_byte()
65 			return i2c_smbus_read_byte_data(data->vsa, reg);  in max16601_read_byte()
66 		return -EOPNOTSUPP;  in max16601_read_byte()
68 	return -ENODATA;  in max16601_read_byte()
71 static int max16601_read_word(struct i2c_client *client, int page, int phase,  in max16601_read_word()  argument
74 	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);  in max16601_read_word()
82 			return -ENODATA;  in max16601_read_word()
87 			ret = i2c_smbus_write_byte_data(client, REG_PHASE_ID,  in max16601_read_word()
91 			ret = i2c_smbus_read_block_data(client,  in max16601_read_word()
97 				return -EIO;  in max16601_read_word()
109 		return -EOPNOTSUPP;  in max16601_read_word()
113 			return i2c_smbus_read_word_data(client, REG_IIN_SENSOR);  in max16601_read_word()
115 			return i2c_smbus_read_word_data(client,  in max16601_read_word()
120 		return -EOPNOTSUPP;  in max16601_read_word()
124 			ret = i2c_smbus_read_word_data(data->vsa,  in max16601_read_word()
129 			    sign_extend32(data->iout_avg_pkg, 10))  in max16601_read_word()
130 				data->iout_avg_pkg = ret;  in max16601_read_word()
131 			return data->iout_avg_pkg;  in max16601_read_word()
142 			return i2c_smbus_read_word_data(data->vsa, reg);  in max16601_read_word()
144 			return -EOPNOTSUPP;  in max16601_read_word()
147 		return -EOPNOTSUPP;  in max16601_read_word()
151 static int max16601_write_byte(struct i2c_client *client, int page, u8 reg)  in max16601_write_byte()  argument
153 	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);  in max16601_write_byte()
158 			return i2c_smbus_write_byte(data->vsa, reg);  in max16601_write_byte()
159 		return -EOPNOTSUPP;  in max16601_write_byte()
161 	return -ENODATA;  in max16601_write_byte()
164 static int max16601_write_word(struct i2c_client *client, int page, int reg,  in max16601_write_word()  argument
167 	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);  in max16601_write_word()
172 		return -ENODATA;  in max16601_write_word()
175 		return -EOPNOTSUPP;  in max16601_write_word()
179 			data->iout_avg_pkg = 0xfc00;  in max16601_write_word()
185 			return i2c_smbus_write_word_data(data->vsa, reg, value);  in max16601_write_word()
187 			return -EOPNOTSUPP;  in max16601_write_word()
192 static int max16601_identify(struct i2c_client *client,  in max16601_identify()  argument
198 	reg = i2c_smbus_read_byte_data(client, REG_SETPT_DVID);  in max16601_identify()
202 		info->vrm_version[0] = vr13;  in max16601_identify()
204 		info->vrm_version[0] = vr12;  in max16601_identify()
206 	if (data->id != max16600 && data->id != max16601 && data->id != max16602)  in max16601_identify()
209 	reg = i2c_smbus_read_byte_data(client, REG_DEFAULT_NUM_POP);  in max16601_identify()
219 		info->phases[0] = reg;  in max16601_identify()
262 	i2c_unregister_device(data->vsa);  in max16601_remove()
274 static int max16601_get_id(struct i2c_client *client)  in max16601_get_id()  argument
276 	struct device *dev = &client->dev;  in max16601_get_id()
278 	enum chips id;  in max16601_get_id()  local
281 	ret = i2c_smbus_read_block_data(client, PMBUS_IC_DEVICE_ID, buf);  in max16601_get_id()
283 		return -ENODEV;  in max16601_get_id()
290 		id = max16508;  in max16601_get_id()
292 		id = max16600;  in max16601_get_id()
294 		id = max16601;  in max16601_get_id()
296 		id = max16602;  in max16601_get_id()
300 		return -ENODEV;  in max16601_get_id()
302 	return id;  in max16601_get_id()
305 static int max16601_probe(struct i2c_client *client)  in max16601_probe()  argument
307 	struct device *dev = &client->dev;  in max16601_probe()
308 	const struct i2c_device_id *id;  in max16601_probe()  local
312 	if (!i2c_check_functionality(client->adapter,  in max16601_probe()
315 		return -ENODEV;  in max16601_probe()
317 	chip_id = max16601_get_id(client);  in max16601_probe()
321 	id = i2c_match_id(max16601_id, client);  in max16601_probe()
322 	if (chip_id != id->driver_data)  in max16601_probe()
323 		dev_warn(&client->dev,  in max16601_probe()
325 			 id->name, (int) id->driver_data, chip_id);  in max16601_probe()
327 	ret = i2c_smbus_read_byte_data(client, REG_PHASE_ID);  in max16601_probe()
333 		return -ENODEV;  in max16601_probe()
338 		return -ENOMEM;  in max16601_probe()
340 	data->id = chip_id;  in max16601_probe()
341 	data->iout_avg_pkg = 0xfc00;  in max16601_probe()
342 	data->vsa = i2c_new_dummy_device(client->adapter, client->addr + 1);  in max16601_probe()
343 	if (IS_ERR(data->vsa)) {  in max16601_probe()
344 		dev_err(dev, "Failed to register VSA client\n");  in max16601_probe()
345 		return PTR_ERR(data->vsa);  in max16601_probe()
351 	data->info = max16601_info;  in max16601_probe()
353 	return pmbus_do_probe(client, &data->info);  in max16601_probe()
366 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");