1 // SPDX-License-Identifier: GPL-2.0+
3  * atlas-ezo-sensor.c - Support for Atlas Scientific EZO sensors
18 #define ATLAS_EZO_DRV_NAME		"atlas-ezo-sensor"
116 	struct i2c_client *client = data->client;  in atlas_ezo_read_raw()
118 	if (chan->type != IIO_CONCENTRATION)  in atlas_ezo_read_raw()
119 		return -EINVAL;  in atlas_ezo_read_raw()
126 		mutex_lock(&data->lock);  in atlas_ezo_read_raw()
131 			mutex_unlock(&data->lock);  in atlas_ezo_read_raw()
135 		msleep(data->chip->delay);  in atlas_ezo_read_raw()
137 		tmp = i2c_master_recv(client, data->buffer, sizeof(data->buffer));  in atlas_ezo_read_raw()
139 		if (tmp < 0 || data->buffer[0] != 1) {  in atlas_ezo_read_raw()
140 			mutex_unlock(&data->lock);  in atlas_ezo_read_raw()
141 			return -EBUSY;  in atlas_ezo_read_raw()
145 		atlas_ezo_sanitize(data->buffer + 2);  in atlas_ezo_read_raw()
147 		ret = kstrtol(data->buffer + 1, 10, &tmp);  in atlas_ezo_read_raw()
151 		mutex_unlock(&data->lock);  in atlas_ezo_read_raw()
156 		switch (chan->type) {  in atlas_ezo_read_raw()
163 			return -EINVAL;  in atlas_ezo_read_raw()
167 		switch (chan->channel2) {  in atlas_ezo_read_raw()
176 		return -EINVAL;  in atlas_ezo_read_raw()
187 	{ "atlas-co2-ezo", ATLAS_CO2_EZO },
188 	{ "atlas-o2-ezo", ATLAS_O2_EZO },
189 	{ "atlas-hum-ezo", ATLAS_HUM_EZO },
195 	{ .compatible = "atlas,co2-ezo", .data = (void *)ATLAS_CO2_EZO, },
196 	{ .compatible = "atlas,o2-ezo", .data = (void *)ATLAS_O2_EZO, },
197 	{ .compatible = "atlas,hum-ezo", .data = (void *)ATLAS_HUM_EZO, },
210 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));  in atlas_ezo_probe()
212 		return -ENOMEM;  in atlas_ezo_probe()
214 	of_id = of_match_device(atlas_ezo_dt_ids, &client->dev);  in atlas_ezo_probe()
216 		chip = &atlas_ezo_devices[id->driver_data];  in atlas_ezo_probe()
218 		chip = &atlas_ezo_devices[(unsigned long)of_id->data];  in atlas_ezo_probe()
220 	indio_dev->info = &atlas_info;  in atlas_ezo_probe()
221 	indio_dev->name = ATLAS_EZO_DRV_NAME;  in atlas_ezo_probe()
222 	indio_dev->channels = chip->channels;  in atlas_ezo_probe()
223 	indio_dev->num_channels = chip->num_channels;  in atlas_ezo_probe()
224 	indio_dev->modes = INDIO_DIRECT_MODE;  in atlas_ezo_probe()
227 	data->client = client;  in atlas_ezo_probe()
228 	data->chip = chip;  in atlas_ezo_probe()
229 	mutex_init(&data->lock);  in atlas_ezo_probe()
231 	return devm_iio_device_register(&client->dev, indio_dev);  in atlas_ezo_probe()