1 // SPDX-License-Identifier: GPL-2.0
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.
58 static int max16601_read_byte(struct i2c_client *client, int page, int reg)  in max16601_read_byte()  argument
61 	struct max16601_data *data = to_max16601_data(info);  in max16601_read_byte()  local
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()
72 			      int reg)  in max16601_read_word()  argument
75 	struct max16601_data *data = to_max16601_data(info);  in max16601_read_word()  local
82 			return -ENODATA;  in max16601_read_word()
83 		switch (reg) {  in max16601_read_word()
97 				return -EIO;  in max16601_read_word()
98 			switch (reg) {  in max16601_read_word()
109 		return -EOPNOTSUPP;  in max16601_read_word()
111 		switch (reg) {  in max16601_read_word()
120 		return -EOPNOTSUPP;  in max16601_read_word()
122 		switch (reg) {  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
154 	struct max16601_data *data = to_max16601_data(info);  in max16601_write_byte()  local
157 		if (reg == PMBUS_CLEAR_FAULTS)  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
168 	struct max16601_data *data = to_max16601_data(info);  in max16601_write_word()  local
172 		return -ENODATA;  in max16601_write_word()
175 		return -EOPNOTSUPP;  in max16601_write_word()
177 		switch (reg) {  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()
195 	struct max16601_data *data = to_max16601_data(info);  in max16601_identify()  local
196 	int reg;  in max16601_identify()  local
198 	reg = i2c_smbus_read_byte_data(client, REG_SETPT_DVID);  in max16601_identify()
199 	if (reg < 0)  in max16601_identify()
200 		return reg;  in max16601_identify()
201 	if (reg & DAC_10MV_MODE)  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()
210 	if (reg < 0)  in max16601_identify()
211 		return reg;  in max16601_identify()
217 	reg &= 0x0f;  in max16601_identify()
218 	if (reg && reg <= MAX16601_NUM_PHASES)  in max16601_identify()
219 		info->phases[0] = reg;  in max16601_identify()
260 	struct max16601_data *data = _data;  in max16601_remove()  local
262 	i2c_unregister_device(data->vsa);  in max16601_remove()
276 	struct device *dev = &client->dev;  in max16601_get_id()
283 		return -ENODEV;  in max16601_get_id()
300 		return -ENODEV;  in max16601_get_id()
307 	struct device *dev = &client->dev;  in max16601_probe()
309 	struct max16601_data *data;  in max16601_probe()  local
312 	if (!i2c_check_functionality(client->adapter,  in max16601_probe()
315 		return -ENODEV;  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()
333 		return -ENODEV;  in max16601_probe()
336 	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);  in max16601_probe()
337 	if (!data)  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()
345 		return PTR_ERR(data->vsa);  in max16601_probe()
347 	ret = devm_add_action_or_reset(dev, max16601_remove, data);  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>");