135 	int ret;  in ccs811_start_sensor_application()  local
137 	ret = i2c_smbus_read_byte_data(client, CCS811_STATUS);  in ccs811_start_sensor_application()
138 	if (ret < 0)  in ccs811_start_sensor_application()
139 		return ret;  in ccs811_start_sensor_application()
141 	if ((ret & CCS811_STATUS_FW_MODE_APPLICATION))  in ccs811_start_sensor_application()
144 	if ((ret & CCS811_STATUS_APP_VALID_MASK) !=  in ccs811_start_sensor_application()
148 	ret = i2c_smbus_write_byte(client, CCS811_APP_START);  in ccs811_start_sensor_application()
149 	if (ret < 0)  in ccs811_start_sensor_application()
150 		return ret;  in ccs811_start_sensor_application()
152 	ret = i2c_smbus_read_byte_data(client, CCS811_STATUS);  in ccs811_start_sensor_application()
153 	if (ret < 0)  in ccs811_start_sensor_application()
154 		return ret;  in ccs811_start_sensor_application()
156 	if ((ret & CCS811_STATUS_FW_MODE_MASK) !=  in ccs811_start_sensor_application()
167 	int ret;  in ccs811_setup()  local
169 	ret = ccs811_start_sensor_application(client);  in ccs811_setup()
170 	if (ret < 0)  in ccs811_setup()
171 		return ret;  in ccs811_setup()
192 	int ret, tries = 11;  in ccs811_get_measurement()  local
198 		ret = i2c_smbus_read_byte_data(data->client, CCS811_STATUS);  in ccs811_get_measurement()
199 		if (ret < 0)  in ccs811_get_measurement()
200 			return ret;  in ccs811_get_measurement()
202 		if ((ret & CCS811_STATUS_DATA_READY) || tries == 0)  in ccs811_get_measurement()
206 	if (!(ret & CCS811_STATUS_DATA_READY))  in ccs811_get_measurement()
209 	ret = i2c_smbus_read_i2c_block_data(data->client,  in ccs811_get_measurement()
214 	return ret;  in ccs811_get_measurement()
222 	int ret;  in ccs811_read_raw()  local
226 		ret = iio_device_claim_direct_mode(indio_dev);  in ccs811_read_raw()
227 		if (ret)  in ccs811_read_raw()
228 			return ret;  in ccs811_read_raw()
230 		ret = ccs811_get_measurement(data);  in ccs811_read_raw()
231 		if (ret < 0) {  in ccs811_read_raw()
234 			return ret;  in ccs811_read_raw()
241 			ret = IIO_VAL_INT;  in ccs811_read_raw()
245 			ret = IIO_VAL_INT;  in ccs811_read_raw()
251 				ret =  IIO_VAL_INT;  in ccs811_read_raw()
255 				ret = IIO_VAL_INT;  in ccs811_read_raw()
258 				ret = -EINVAL;  in ccs811_read_raw()
262 			ret = -EINVAL;  in ccs811_read_raw()
267 		return ret;  in ccs811_read_raw()
309 	int ret;  in ccs811_set_trigger_state()  local
311 	ret = i2c_smbus_read_byte_data(data->client, CCS811_MEAS_MODE);  in ccs811_set_trigger_state()
312 	if (ret < 0)  in ccs811_set_trigger_state()
313 		return ret;  in ccs811_set_trigger_state()
316 		ret |= CCS811_MEAS_MODE_INTERRUPT;  in ccs811_set_trigger_state()
318 		ret &= ~CCS811_MEAS_MODE_INTERRUPT;  in ccs811_set_trigger_state()
322 	return i2c_smbus_write_byte_data(data->client, CCS811_MEAS_MODE, ret);  in ccs811_set_trigger_state()
335 	int ret;  in ccs811_trigger_handler()  local
337 	ret = i2c_smbus_read_i2c_block_data(client, CCS811_ALG_RESULT_DATA,  in ccs811_trigger_handler()
340 	if (ret != 4) {  in ccs811_trigger_handler()
368 	int ret;  in ccs811_reset()  local
390 		ret = i2c_smbus_write_i2c_block_data(client, CCS811_SW_RESET,  in ccs811_reset()
392 		if (ret < 0) {  in ccs811_reset()
394 			return ret;  in ccs811_reset()
409 	int ret;  in ccs811_probe()  local
431 	ret = ccs811_reset(client);  in ccs811_probe()
432 	if (ret) {  in ccs811_probe()
434 		return ret;  in ccs811_probe()
438 	ret = i2c_smbus_read_byte_data(client, CCS811_HW_ID);  in ccs811_probe()
439 	if (ret < 0) {  in ccs811_probe()
441 		return ret;  in ccs811_probe()
444 	if (ret != CCS811_HW_ID_VALUE) {  in ccs811_probe()
450 	ret = i2c_smbus_read_byte_data(client, CCS811_HW_VERSION);  in ccs811_probe()
451 	if (ret < 0) {  in ccs811_probe()
453 		return ret;  in ccs811_probe()
456 	if ((ret & CCS811_HW_VERSION_MASK) != CCS811_HW_VERSION_VALUE) {  in ccs811_probe()
462 	ret = ccs811_setup(client);  in ccs811_probe()
463 	if (ret < 0) {  in ccs811_probe()
465 		return ret;  in ccs811_probe()
480 		ret = devm_request_threaded_irq(&client->dev, client->irq,  in ccs811_probe()
486 		if (ret) {  in ccs811_probe()
487 			dev_err(&client->dev, "irq request error %d\n", -ret);  in ccs811_probe()
496 			ret = -ENOMEM;  in ccs811_probe()
502 		ret = iio_trigger_register(data->drdy_trig);  in ccs811_probe()
503 		if (ret)  in ccs811_probe()
509 	ret = iio_triggered_buffer_setup(indio_dev, NULL,  in ccs811_probe()
512 	if (ret < 0) {  in ccs811_probe()
517 	ret = iio_device_register(indio_dev);  in ccs811_probe()
518 	if (ret < 0) {  in ccs811_probe()
532 	return ret;  in ccs811_probe()
539 	int ret;  in ccs811_remove()  local
546 	ret = i2c_smbus_write_byte_data(client, CCS811_MEAS_MODE,  in ccs811_remove()
548 	if (ret)  in ccs811_remove()
550 			 ERR_PTR(ret));  in ccs811_remove()