hwmon/pmbus/ltc2978.c

138 static int ltc_wait_ready(struct i2c_client *client)
141 	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
158 		status = pmbus_read_byte_data(client, 0, LTC2978_MFR_COMMON);
176 static int ltc_read_word_data(struct i2c_client *client, int page, int phase,
181 	ret = ltc_wait_ready(client);
185 	return pmbus_read_word_data(client, page, 0xff, reg);
188 static int ltc_read_byte_data(struct i2c_client *client, int page, int reg)
192 	ret = ltc_wait_ready(client);
196 	return pmbus_read_byte_data(client, page, reg);
199 static int ltc_write_byte_data(struct i2c_client *client, int page, int reg, u8 value)
203 	ret = ltc_wait_ready(client);
207 	return pmbus_write_byte_data(client, page, reg, value);
210 static int ltc_write_byte(struct i2c_client *client, int page, u8 byte)
214 	ret = ltc_wait_ready(client);
218 	return pmbus_write_byte(client, page, byte);
234 static int ltc_get_max(struct ltc2978_data *data, struct i2c_client *client,
239 	ret = ltc_read_word_data(client, page, 0xff, reg);
248 static int ltc_get_min(struct ltc2978_data *data, struct i2c_client *client,
253 	ret = ltc_read_word_data(client, page, 0xff, reg);
262 static int ltc2978_read_word_data_common(struct i2c_client *client, int page,
265 	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
271 		ret = ltc_get_max(data, client, page, LTC2978_MFR_VIN_PEAK,
275 		ret = ltc_read_word_data(client, page, 0xff,
288 		ret = ltc_get_max(data, client, page,
298 		ret = ltc_wait_ready(client);
307 static int ltc2978_read_word_data(struct i2c_client *client, int page,
310 	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
316 		ret = ltc_get_min(data, client, page, LTC2978_MFR_VIN_MIN,
320 		ret = ltc_read_word_data(client, page, phase,
337 		ret = ltc_get_min(data, client, page,
348 		ret = ltc2978_read_word_data_common(client, page, reg);
354 static int ltc2974_read_word_data(struct i2c_client *client, int page,
357 	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
363 		ret = ltc_get_max(data, client, page, LTC2974_MFR_IOUT_PEAK,
367 		ret = ltc_get_min(data, client, page, LTC2974_MFR_IOUT_MIN,
374 		ret = ltc2978_read_word_data(client, page, phase, reg);
380 static int ltc2975_read_word_data(struct i2c_client *client, int page,
383 	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
389 		ret = ltc_get_max(data, client, page, LTC2975_MFR_IIN_PEAK,
393 		ret = ltc_get_min(data, client, page, LTC2975_MFR_IIN_MIN,
397 		ret = ltc_get_max(data, client, page, LTC2975_MFR_PIN_PEAK,
401 		ret = ltc_get_min(data, client, page, LTC2975_MFR_PIN_MIN,
409 		ret = ltc2978_read_word_data(client, page, phase, reg);
415 static int ltc3880_read_word_data(struct i2c_client *client, int page,
418 	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
424 		ret = ltc_get_max(data, client, page, LTC3880_MFR_IOUT_PEAK,
428 		ret = ltc_get_max(data, client, page,
442 		ret = ltc2978_read_word_data_common(client, page, reg);
448 static int ltc3883_read_word_data(struct i2c_client *client, int page,
451 	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
457 		ret = ltc_get_max(data, client, page, LTC3883_MFR_IIN_PEAK,
464 		ret = ltc3880_read_word_data(client, page, phase, reg);
471 			       struct i2c_client *client, int page)
476 		ret = ltc_write_byte(client, 0, LTC3880_MFR_CLEAR_PEAKS);
478 		ret = ltc_write_byte(client, page, PMBUS_CLEAR_FAULTS);
483 static int ltc2978_write_word_data(struct i2c_client *client, int page,
486 	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
494 		ret = ltc2978_clear_peaks(data, client, 0);
499 		ret = ltc2978_clear_peaks(data, client, 0);
504 		ret = ltc2978_clear_peaks(data, client, page);
508 		ret = ltc2978_clear_peaks(data, client, page);
513 		ret = ltc2978_clear_peaks(data, client, page);
518 		ret = ltc2978_clear_peaks(data, client, page);
523 		ret = ltc2978_clear_peaks(data, client, page);
526 		ret = ltc_wait_ready(client);
595 static int ltc2978_get_id(struct i2c_client *client)
599 	chip_id = i2c_smbus_read_word_data(client, LTC2978_MFR_SPECIAL_ID);
605 		if (!i2c_check_functionality(client->adapter,
609 		ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, buf);
615 		ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf);
679 	dev_err(&client->dev, "Unsupported chip ID 0x%x\n", chip_id);
683 static int ltc2978_probe(struct i2c_client *client)
690 	if (!i2c_check_functionality(client->adapter,
694 	data = devm_kzalloc(&client->dev, sizeof(struct ltc2978_data),
699 	chip_id = ltc2978_get_id(client);
704 	id = i2c_match_id(ltc2978_id, client);
706 		dev_warn(&client->dev,
874 			dev_warn(&client->dev, "num_regulators too large!");
881 			dev_warn(&client->dev, "num_regulators too large!");
889 	return pmbus_do_probe(client, info);