1 // SPDX-License-Identifier: GPL-2.0
3  * Senseair Sunrise 006-0-0007 CO2 sensor driver.
8  * - controllable EN pin
9  * - single-shot operations using the nDRY pin.
10  * - ABC/target calibration
58 		return -EINVAL;  in sunrise_regmap_read()
64 	 * Wake up sensor by sending sensor address: START, sensor address,  in sunrise_regmap_read()
65 	 * STOP. Sensor will not ACK this byte.  in sunrise_regmap_read()
70 	__i2c_smbus_xfer(client->adapter, client->addr,  in sunrise_regmap_read()
71 			 sunrise->ignore_nak ? I2C_M_IGNORE_NAK : 0,  in sunrise_regmap_read()
76 	ret = __i2c_smbus_xfer(client->adapter, client->addr, client->flags,  in sunrise_regmap_read()
95 		return -EINVAL;  in sunrise_regmap_write()
96 	count--;  in sunrise_regmap_write()
102 	__i2c_smbus_xfer(client->adapter, client->addr,  in sunrise_regmap_write()
103 			 sunrise->ignore_nak ? I2C_M_IGNORE_NAK : 0,  in sunrise_regmap_write()
108 	return __i2c_smbus_xfer(client->adapter, client->addr, client->flags,  in sunrise_regmap_write()
120 	const struct i2c_client *client = sunrise->client;  in sunrise_read_byte()
121 	const struct device *dev = &client->dev;  in sunrise_read_byte()
125 	i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT);  in sunrise_read_byte()
126 	ret = regmap_read(sunrise->regmap, reg, &val);  in sunrise_read_byte()
127 	i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT);  in sunrise_read_byte()
138 	const struct i2c_client *client = sunrise->client;  in sunrise_read_word()
139 	const struct device *dev = &client->dev;  in sunrise_read_word()
143 	i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT);  in sunrise_read_word()
144 	ret = regmap_bulk_read(sunrise->regmap, reg, &be_val, sizeof(be_val));  in sunrise_read_word()
145 	i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT);  in sunrise_read_word()
158 	const struct i2c_client *client = sunrise->client;  in sunrise_write_byte()
159 	const struct device *dev = &client->dev;  in sunrise_write_byte()
162 	i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT);  in sunrise_write_byte()
163 	ret = regmap_write(sunrise->regmap, reg, val);  in sunrise_write_byte()
164 	i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT);  in sunrise_write_byte()
173 	const struct i2c_client *client = sunrise->client;  in sunrise_write_word()
174 	const struct device *dev = &client->dev;  in sunrise_write_word()
178 	i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT);  in sunrise_write_word()
179 	ret = regmap_bulk_write(sunrise->regmap, reg, &be_data, sizeof(be_data));  in sunrise_write_word()
180 	i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT);  in sunrise_write_word()
223 	ret = sunrise_write_word(sunrise, SUNRISE_CALIBRATION_COMMAND_REG, data->cmd);  in sunrise_calibrate()
227 	dev_dbg(&sunrise->client->dev, "%s in progress\n", data->name);  in sunrise_calibrate()
233 	return read_poll_timeout(sunrise_read_byte, status, status & data->bit,  in sunrise_calibrate()
254 	mutex_lock(&sunrise->lock);  in sunrise_cal_factory_write()
256 	mutex_unlock(&sunrise->lock);  in sunrise_cal_factory_write()
279 	mutex_lock(&sunrise->lock);  in sunrise_cal_background_write()
281 	mutex_unlock(&sunrise->lock);  in sunrise_cal_background_write()
332 	mutex_lock(&sunrise->lock);  in sunrise_error_status_read()
335 		mutex_unlock(&sunrise->lock);  in sunrise_error_status_read()
344 		buf[len - 1] = '\n';  in sunrise_error_status_read()
346 	mutex_unlock(&sunrise->lock);  in sunrise_error_status_read()
405 		switch (chan->type) {  in sunrise_read_raw()
407 			mutex_lock(&sunrise->lock);  in sunrise_read_raw()
410 			mutex_unlock(&sunrise->lock);  in sunrise_read_raw()
419 			mutex_lock(&sunrise->lock);  in sunrise_read_raw()
422 			mutex_unlock(&sunrise->lock);  in sunrise_read_raw()
431 			return -EINVAL;  in sunrise_read_raw()
435 		switch (chan->type) {  in sunrise_read_raw()
438 			 * 1 / 10^4 to comply with IIO scale for CO2  in sunrise_read_raw()
439 			 * (percentage). The chip CO2 reading range is [400 -  in sunrise_read_raw()
440 			 * 5000] ppm which corresponds to [0,004 - 0,5] %.  in sunrise_read_raw()
452 			return -EINVAL;  in sunrise_read_raw()
456 		return -EINVAL;  in sunrise_read_raw()
479 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA |  in sunrise_probe()
481 		dev_err(&client->dev,  in sunrise_probe()
483 		return -EOPNOTSUPP;  in sunrise_probe()
486 	iio_dev = devm_iio_device_alloc(&client->dev, sizeof(*sunrise));  in sunrise_probe()
488 		return -ENOMEM;  in sunrise_probe()
491 	sunrise->client = client;  in sunrise_probe()
492 	mutex_init(&sunrise->lock);  in sunrise_probe()
496 	sunrise->regmap = devm_regmap_init(&client->dev, &sunrise_regmap_bus,  in sunrise_probe()
498 	if (IS_ERR(sunrise->regmap)) {  in sunrise_probe()
499 		dev_err(&client->dev, "Failed to initialize regmap\n");  in sunrise_probe()
500 		return PTR_ERR(sunrise->regmap);  in sunrise_probe()
508 	if (i2c_check_functionality(client->adapter, I2C_FUNC_PROTOCOL_MANGLING))  in sunrise_probe()
509 		sunrise->ignore_nak = true;  in sunrise_probe()
511 	iio_dev->info = &sunrise_info;  in sunrise_probe()
512 	iio_dev->name = DRIVER_NAME;  in sunrise_probe()
513 	iio_dev->channels = sunrise_channels;  in sunrise_probe()
514 	iio_dev->num_channels = ARRAY_SIZE(sunrise_channels);  in sunrise_probe()
515 	iio_dev->modes = INDIO_DIRECT_MODE;  in sunrise_probe()
517 	return devm_iio_device_register(&client->dev, iio_dev);  in sunrise_probe()
521 	{ .compatible = "senseair,sunrise-006-0-0007" },
536 MODULE_DESCRIPTION("Senseair Sunrise 006-0-0007 CO2 sensor IIO driver");