1 // SPDX-License-Identifier: GPL-2.0+
3  * atlas-ezo-sensor.c - Support for Atlas Scientific EZO sensors
20 #define ATLAS_EZO_DRV_NAME		"atlas-ezo-sensor"
118 	struct i2c_client *client = data->client;  in atlas_ezo_read_raw()
120 	if (chan->type != IIO_CONCENTRATION)  in atlas_ezo_read_raw()
121 		return -EINVAL;  in atlas_ezo_read_raw()
128 		mutex_lock(&data->lock);  in atlas_ezo_read_raw()
133 			mutex_unlock(&data->lock);  in atlas_ezo_read_raw()
137 		msleep(data->chip->delay);  in atlas_ezo_read_raw()
139 		tmp = i2c_master_recv(client, data->buffer, sizeof(data->buffer));  in atlas_ezo_read_raw()
141 		if (tmp < 0 || data->buffer[0] != 1) {  in atlas_ezo_read_raw()
142 			mutex_unlock(&data->lock);  in atlas_ezo_read_raw()
143 			return -EBUSY;  in atlas_ezo_read_raw()
147 		atlas_ezo_sanitize(data->buffer + 2);  in atlas_ezo_read_raw()
149 		ret = kstrtol(data->buffer + 1, 10, &tmp);  in atlas_ezo_read_raw()
153 		mutex_unlock(&data->lock);  in atlas_ezo_read_raw()
158 		switch (chan->type) {  in atlas_ezo_read_raw()
165 			return -EINVAL;  in atlas_ezo_read_raw()
169 		switch (chan->channel2) {  in atlas_ezo_read_raw()
178 		return -EINVAL;  in atlas_ezo_read_raw()
189 	{ "atlas-co2-ezo", (kernel_ulong_t)&atlas_ezo_devices[ATLAS_CO2_EZO] },
190 	{ "atlas-o2-ezo", (kernel_ulong_t)&atlas_ezo_devices[ATLAS_O2_EZO] },
191 	{ "atlas-hum-ezo", (kernel_ulong_t)&atlas_ezo_devices[ATLAS_HUM_EZO] },
197 	{ .compatible = "atlas,co2-ezo", .data = &atlas_ezo_devices[ATLAS_CO2_EZO], },
198 	{ .compatible = "atlas,o2-ezo", .data = &atlas_ezo_devices[ATLAS_O2_EZO], },
199 	{ .compatible = "atlas,hum-ezo", .data = &atlas_ezo_devices[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()
216 		return -EINVAL;  in atlas_ezo_probe()
218 	indio_dev->info = &atlas_info;  in atlas_ezo_probe()
219 	indio_dev->name = ATLAS_EZO_DRV_NAME;  in atlas_ezo_probe()
220 	indio_dev->channels = chip->channels;  in atlas_ezo_probe()
221 	indio_dev->num_channels = chip->num_channels;  in atlas_ezo_probe()
222 	indio_dev->modes = INDIO_DIRECT_MODE;  in atlas_ezo_probe()
225 	data->client = client;  in atlas_ezo_probe()
226 	data->chip = chip;  in atlas_ezo_probe()
227 	mutex_init(&data->lock);  in atlas_ezo_probe()
229 	return devm_iio_device_register(&client->dev, indio_dev);  in atlas_ezo_probe()