1 // SPDX-License-Identifier: GPL-2.0
8  * Datasheet: https://www.allsensors.com/cad/DS-0355_Rev_B.PDF
42 	unsigned int fss;   /* full scale span (inch H2O) */
69 	ret = i2c_smbus_write_byte(st->client, DLH_START_SINGLE);  in dlh_cmd_start_single()
71 		dev_err(&st->client->dev,  in dlh_cmd_start_single()
81 	ret = i2c_master_recv(st->client, st->rx_buf, DLH_NUM_READ_BYTES);  in dlh_cmd_read_data()
83 		dev_err(&st->client->dev,  in dlh_cmd_read_data()
88 	if (st->rx_buf[0] != DLH_STATUS_OK) {  in dlh_cmd_read_data()
89 		dev_err(&st->client->dev,  in dlh_cmd_read_data()
90 			"%s: invalid status 0x%02x\n", __func__, st->rx_buf[0]);  in dlh_cmd_read_data()
91 		return -EBUSY;  in dlh_cmd_read_data()
101 	if (st->use_interrupt)  in dlh_start_capture_and_read()
102 		reinit_completion(&st->completion);  in dlh_start_capture_and_read()
108 	if (st->use_interrupt) {  in dlh_start_capture_and_read()
109 		ret = wait_for_completion_timeout(&st->completion,  in dlh_start_capture_and_read()
112 			dev_err(&st->client->dev,  in dlh_start_capture_and_read()
114 			return -ETIMEDOUT;  in dlh_start_capture_and_read()
132 	*pressure = get_unaligned_be24(&st->rx_buf[1]);  in dlh_read_direct()
133 	*temperature = get_unaligned_be24(&st->rx_buf[4]);  in dlh_read_direct()
159 		switch (channel->type) {  in dlh_read_raw()
169 			return -EINVAL;  in dlh_read_raw()
172 		switch (channel->type) {  in dlh_read_raw()
174 			tmp = div_s64(125LL * st->info.fss * 24909 * 100,  in dlh_read_raw()
187 			return -EINVAL;  in dlh_read_raw()
190 		switch (channel->type) {  in dlh_read_raw()
192 			*value = -125 * st->info.fss * 24909;  in dlh_read_raw()
193 			*value2 = 100 * st->info.osdig * 100000;  in dlh_read_raw()
197 			*value = -40 * 1000;  in dlh_read_raw()
201 			return -EINVAL;  in dlh_read_raw()
205 	return -EINVAL;  in dlh_read_raw()
249 	struct iio_dev *indio_dev = pf->indio_dev;  in dlh_trigger_handler()
261 			&st->rx_buf[1] + chn * DLH_NUM_DATA_BYTES,  in dlh_trigger_handler()
268 	iio_trigger_notify_done(indio_dev->trig);  in dlh_trigger_handler()
278 	complete(&st->completion);  in dlh_interrupt()
290 	if (!i2c_check_functionality(client->adapter,  in dlh_probe()
292 		dev_err(&client->dev,  in dlh_probe()
294 		return -EOPNOTSUPP;  in dlh_probe()
297 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*st));  in dlh_probe()
299 		dev_err(&client->dev, "failed to allocate iio device\n");  in dlh_probe()
300 		return -ENOMEM;  in dlh_probe()
306 	st->info = dlh_info_tbl[id->driver_data];  in dlh_probe()
307 	st->client = client;  in dlh_probe()
308 	st->use_interrupt = false;  in dlh_probe()
310 	indio_dev->name = id->name;  in dlh_probe()
311 	indio_dev->info = &dlh_info;  in dlh_probe()
312 	indio_dev->modes = INDIO_DIRECT_MODE;  in dlh_probe()
313 	indio_dev->channels =  dlh_channels;  in dlh_probe()
314 	indio_dev->num_channels = ARRAY_SIZE(dlh_channels);  in dlh_probe()
316 	if (client->irq > 0) {  in dlh_probe()
317 		ret = devm_request_threaded_irq(&client->dev, client->irq,  in dlh_probe()
320 			id->name, indio_dev);  in dlh_probe()
322 			dev_err(&client->dev, "failed to allocate threaded irq");  in dlh_probe()
326 		st->use_interrupt = true;  in dlh_probe()
327 		init_completion(&st->completion);  in dlh_probe()
330 	ret = devm_iio_triggered_buffer_setup(&client->dev, indio_dev,  in dlh_probe()
333 		dev_err(&client->dev, "failed to setup iio buffer\n");  in dlh_probe()
337 	ret = devm_iio_device_register(&client->dev, indio_dev);  in dlh_probe()
339 		dev_err(&client->dev, "failed to register iio device\n");  in dlh_probe()