iio/chemical/ccs811.c

135 	int ret;
137 	ret = i2c_smbus_read_byte_data(client, CCS811_STATUS);
138 	if (ret < 0)
139 		return ret;
141 	if ((ret & CCS811_STATUS_FW_MODE_APPLICATION))
144 	if ((ret & CCS811_STATUS_APP_VALID_MASK) !=
148 	ret = i2c_smbus_write_byte(client, CCS811_APP_START);
149 	if (ret < 0)
150 		return ret;
152 	ret = i2c_smbus_read_byte_data(client, CCS811_STATUS);
153 	if (ret < 0)
154 		return ret;
156 	if ((ret & CCS811_STATUS_FW_MODE_MASK) !=
167 	int ret;
169 	ret = ccs811_start_sensor_application(client);
170 	if (ret < 0)
171 		return ret;
192 	int ret, tries = 11;
198 		ret = i2c_smbus_read_byte_data(data->client, CCS811_STATUS);
199 		if (ret < 0)
200 			return ret;
202 		if ((ret & CCS811_STATUS_DATA_READY) || tries == 0)
206 	if (!(ret & CCS811_STATUS_DATA_READY))
209 	ret = i2c_smbus_read_i2c_block_data(data->client,
214 	return ret;
222 	int ret;
226 		ret = iio_device_claim_direct_mode(indio_dev);
227 		if (ret)
228 			return ret;
230 		ret = ccs811_get_measurement(data);
231 		if (ret < 0) {
234 			return ret;
241 			ret = IIO_VAL_INT;
245 			ret = IIO_VAL_INT;
251 				ret =  IIO_VAL_INT;
255 				ret = IIO_VAL_INT;
258 				ret = -EINVAL;
262 			ret = -EINVAL;
267 		return ret;
309 	int ret;
311 	ret = i2c_smbus_read_byte_data(data->client, CCS811_MEAS_MODE);
312 	if (ret < 0)
313 		return ret;
316 		ret |= CCS811_MEAS_MODE_INTERRUPT;
318 		ret &= ~CCS811_MEAS_MODE_INTERRUPT;
322 	return i2c_smbus_write_byte_data(data->client, CCS811_MEAS_MODE, ret);
335 	int ret;
337 	ret = i2c_smbus_read_i2c_block_data(client, CCS811_ALG_RESULT_DATA,
340 	if (ret != 4) {
368 	int ret;
390 		ret = i2c_smbus_write_i2c_block_data(client, CCS811_SW_RESET,
392 		if (ret < 0) {
394 			return ret;
409 	int ret;
431 	ret = ccs811_reset(client);
432 	if (ret) {
434 		return ret;
438 	ret = i2c_smbus_read_byte_data(client, CCS811_HW_ID);
439 	if (ret < 0) {
441 		return ret;
444 	if (ret != CCS811_HW_ID_VALUE) {
450 	ret = i2c_smbus_read_byte_data(client, CCS811_HW_VERSION);
451 	if (ret < 0) {
453 		return ret;
456 	if ((ret & CCS811_HW_VERSION_MASK) != CCS811_HW_VERSION_VALUE) {
462 	ret = ccs811_setup(client);
463 	if (ret < 0) {
465 		return ret;
480 		ret = devm_request_threaded_irq(&client->dev, client->irq,
486 		if (ret) {
487 			dev_err(&client->dev, "irq request error %d\n", -ret);
496 			ret = -ENOMEM;
502 		ret = iio_trigger_register(data->drdy_trig);
503 		if (ret)
509 	ret = iio_triggered_buffer_setup(indio_dev, NULL,
512 	if (ret < 0) {
517 	ret = iio_device_register(indio_dev);
518 	if (ret < 0) {
532 	return ret;
539 	int ret;
546 	ret = i2c_smbus_write_byte_data(client, CCS811_MEAS_MODE,
548 	if (ret)
550 			 ERR_PTR(ret));