1 // SPDX-License-Identifier: GPL-2.0+
3  * mb1232.c - Support for MaxBotix I2CXL-MaxSonar-EZ series ultrasonic
7  * Copyright (c) 2019 Andreas Klinger <ak@it-klinger.de>
10  * https://www.maxbotix.com/documents/I2CXL-MaxSonar-EZ_Datasheet.pdf
27 /* registers of MaxSonar device */
57 	complete(&data->ranging);  in mb1232_handle_irq()
64 	struct i2c_client *client = data->client;  in mb1232_read_distance()
69 	mutex_lock(&data->lock);  in mb1232_read_distance()
71 	reinit_completion(&data->ranging);  in mb1232_read_distance()
75 		dev_err(&client->dev, "write command - err: %d\n", ret);  in mb1232_read_distance()
79 	if (data->irqnr >= 0) {  in mb1232_read_distance()
81 		ret = wait_for_completion_killable_timeout(&data->ranging,  in mb1232_read_distance()
86 			ret = -ETIMEDOUT;  in mb1232_read_distance()
96 		dev_err(&client->dev, "i2c_master_recv: ret=%d\n", ret);  in mb1232_read_distance()
103 		dev_err(&client->dev, "distance=%d\n", distance);  in mb1232_read_distance()
104 		ret = -EINVAL;  in mb1232_read_distance()
108 	mutex_unlock(&data->lock);  in mb1232_read_distance()
113 	mutex_unlock(&data->lock);  in mb1232_read_distance()
121 	struct iio_dev *indio_dev = pf->indio_dev;  in mb1232_trigger_handler()
124 	data->scan.distance = mb1232_read_distance(data);  in mb1232_trigger_handler()
125 	if (data->scan.distance < 0)  in mb1232_trigger_handler()
128 	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,  in mb1232_trigger_handler()
129 					   pf->timestamp);  in mb1232_trigger_handler()
132 	iio_trigger_notify_done(indio_dev->trig);  in mb1232_trigger_handler()
143 	if (channel->type != IIO_DISTANCE)  in mb1232_read_raw()
144 		return -EINVAL;  in mb1232_read_raw()
159 		return -EINVAL;  in mb1232_read_raw()
189 	struct device *dev = &client->dev;  in mb1232_probe()
191 	if (!i2c_check_functionality(client->adapter,  in mb1232_probe()
194 		return -ENODEV;  in mb1232_probe()
198 		return -ENOMEM;  in mb1232_probe()
202 	data->client = client;  in mb1232_probe()
204 	indio_dev->info = &mb1232_info;  in mb1232_probe()
205 	indio_dev->name = id->name;  in mb1232_probe()
206 	indio_dev->modes = INDIO_DIRECT_MODE;  in mb1232_probe()
207 	indio_dev->channels = mb1232_channels;  in mb1232_probe()
208 	indio_dev->num_channels = ARRAY_SIZE(mb1232_channels);  in mb1232_probe()
210 	mutex_init(&data->lock);  in mb1232_probe()
212 	init_completion(&data->ranging);  in mb1232_probe()
214 	data->irqnr = fwnode_irq_get(dev_fwnode(&client->dev), 0);  in mb1232_probe()
215 	if (data->irqnr <= 0) {  in mb1232_probe()
217 		data->irqnr = -1;  in mb1232_probe()
219 		ret = devm_request_irq(dev, data->irqnr, mb1232_handle_irq,  in mb1232_probe()
220 				IRQF_TRIGGER_FALLING, id->name, indio_dev);  in mb1232_probe()
251 	{ "maxbotix-mb1202", },
252 	{ "maxbotix-mb1212", },
253 	{ "maxbotix-mb1222", },
254 	{ "maxbotix-mb1232", },
255 	{ "maxbotix-mb1242", },
256 	{ "maxbotix-mb7040", },
257 	{ "maxbotix-mb7137", },
264 		.name	= "maxbotix-mb1232",
272 MODULE_AUTHOR("Andreas Klinger <ak@it-klinger.de>");
273 MODULE_DESCRIPTION("Maxbotix I2CXL-MaxSonar i2c ultrasonic ranger driver");