1 // SPDX-License-Identifier: GPL-2.0-only
3  * hp206c.c - HOPERF HP206C precision barometer and altimeter sensor
7  * (7-bit I2C slave address 0x76)
10  *  http://www.hoperf.com/upload/sensor/HP206C_DataSheet_EN_V2.0.pdf
102 		return -EIO;  in hp206c_read_20bit()
112 	struct i2c_client *client = data->client;  in hp206c_wait_dev_rdy()
117 			dev_err(&indio_dev->dev, "Failed READ_REG INT_SRC: %d\n", ret);  in hp206c_wait_dev_rdy()
124 	return -ETIMEDOUT;  in hp206c_wait_dev_rdy()
147 	struct i2c_client *client = data->client;  in hp206c_soft_reset()
151 		dev_err(&client->dev, "Failed to reset device: %d\n", ret);  in hp206c_soft_reset()
159 		dev_err(&client->dev, "Device not ready after soft reset: %d\n", ret);  in hp206c_soft_reset()
165 		dev_err(&client->dev, "Failed to enable compensation: %d\n", ret);  in hp206c_soft_reset()
175 	struct i2c_client *client = data->client;  in hp206c_conv_and_read()
179 		dev_err(&indio_dev->dev, "Device not ready: %d\n", ret);  in hp206c_conv_and_read()
185 		dev_err(&indio_dev->dev, "Failed convert: %d\n", ret);  in hp206c_conv_and_read()
193 		dev_err(&indio_dev->dev, "Device not ready: %d\n", ret);  in hp206c_conv_and_read()
199 		dev_err(&indio_dev->dev, "Failed read: %d\n", ret);  in hp206c_conv_and_read()
213 	mutex_lock(&data->mutex);  in hp206c_read_raw()
217 		switch (chan->type) {  in hp206c_read_raw()
219 			*val = hp206c_osr_rates[data->temp_osr_index];  in hp206c_read_raw()
224 			*val = hp206c_osr_rates[data->pres_osr_index];  in hp206c_read_raw()
228 			ret = -EINVAL;  in hp206c_read_raw()
233 		switch (chan->type) {  in hp206c_read_raw()
235 			osr_setting = &hp206c_osr_settings[data->temp_osr_index];  in hp206c_read_raw()
237 					osr_setting->osr_mask |  in hp206c_read_raw()
242 					osr_setting->temp_conv_time_us);  in hp206c_read_raw()
253 			osr_setting = &hp206c_osr_settings[data->pres_osr_index];  in hp206c_read_raw()
255 					osr_setting->osr_mask |  in hp206c_read_raw()
260 					osr_setting->pres_conv_time_us);  in hp206c_read_raw()
267 			ret = -EINVAL;  in hp206c_read_raw()
272 		switch (chan->type) {  in hp206c_read_raw()
285 			ret = -EINVAL;  in hp206c_read_raw()
290 		ret = -EINVAL;  in hp206c_read_raw()
293 	mutex_unlock(&data->mutex);  in hp206c_read_raw()
305 		return -EINVAL;  in hp206c_write_raw()
306 	mutex_lock(&data->mutex);  in hp206c_write_raw()
307 	switch (chan->type) {  in hp206c_write_raw()
309 		data->temp_osr_index = find_closest_descending(val,  in hp206c_write_raw()
313 		data->pres_osr_index = find_closest_descending(val,  in hp206c_write_raw()
317 		ret = -EINVAL;  in hp206c_write_raw()
319 	mutex_unlock(&data->mutex);  in hp206c_write_raw()
362 	if (!i2c_check_functionality(client->adapter,  in hp206c_probe()
366 		dev_err(&client->dev, "Adapter does not support "  in hp206c_probe()
368 		return -ENODEV;  in hp206c_probe()
371 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));  in hp206c_probe()
373 		return -ENOMEM;  in hp206c_probe()
376 	data->client = client;  in hp206c_probe()
377 	mutex_init(&data->mutex);  in hp206c_probe()
379 	indio_dev->info = &hp206c_info;  in hp206c_probe()
380 	indio_dev->name = id->name;  in hp206c_probe()
381 	indio_dev->modes = INDIO_DIRECT_MODE;  in hp206c_probe()
382 	indio_dev->channels = hp206c_channels;  in hp206c_probe()
383 	indio_dev->num_channels = ARRAY_SIZE(hp206c_channels);  in hp206c_probe()
390 		dev_err(&client->dev, "Failed to reset on startup: %d\n", ret);  in hp206c_probe()
391 		return -ENODEV;  in hp206c_probe()
394 	return devm_iio_device_register(&client->dev, indio_dev);  in hp206c_probe()
422 MODULE_DESCRIPTION("HOPERF HP206C precision barometer and altimeter sensor");