1 // SPDX-License-Identifier: GPL-2.0-only
3  * Sensortek STK3310/STK3311 Ambient Light and Proximity Sensor
7  * IIO driver for STK3310/STK3311. 7-bit I2C address: 0x48.
58 		data->reg_##name =					    \
59 			devm_regmap_field_alloc(&client->dev, regmap,	    \
61 		if (IS_ERR(data->reg_##name)) {				    \
62 			dev_err(&client->dev, "reg field alloc failed.\n"); \
63 			return PTR_ERR(data->reg_##name);		    \
84 /* Estimate maximum proximity values with regard to measurement scale. */
123 	/* Proximity event */
130 	/* Out-of-proximity event */
146 	return sprintf(buf, "%u\n", data->ps_near_level);  in stk3310_read_near_level()
210 	return -EINVAL;  in stk3310_get_index()
226 		return -EINVAL;  in stk3310_read_event()
228 	/* Only proximity interrupts are implemented at the moment. */  in stk3310_read_event()
234 		return -EINVAL;  in stk3310_read_event()
236 	mutex_lock(&data->lock);  in stk3310_read_event()
237 	ret = regmap_bulk_read(data->regmap, reg, &buf, 2);  in stk3310_read_event()
238 	mutex_unlock(&data->lock);  in stk3310_read_event()
240 		dev_err(&data->client->dev, "register read failed\n");  in stk3310_read_event()
260 	struct i2c_client *client = data->client;  in stk3310_write_event()
262 	ret = regmap_field_read(data->reg_ps_gain, &index);  in stk3310_write_event()
267 		return -EINVAL;  in stk3310_write_event()
274 		return -EINVAL;  in stk3310_write_event()
277 	ret = regmap_bulk_write(data->regmap, reg, &buf, 2);  in stk3310_write_event()
279 		dev_err(&client->dev, "failed to set PS threshold!\n");  in stk3310_write_event()
293 	ret = regmap_field_read(data->reg_int_ps, &event_val);  in stk3310_read_event_config()
308 	struct i2c_client *client = data->client;  in stk3310_write_event_config()
311 		return -EINVAL;  in stk3310_write_event_config()
314 	mutex_lock(&data->lock);  in stk3310_write_event_config()
315 	ret = regmap_field_write(data->reg_int_ps, state);  in stk3310_write_event_config()
317 		dev_err(&client->dev, "failed to set interrupt mode\n");  in stk3310_write_event_config()
318 	mutex_unlock(&data->lock);  in stk3310_write_event_config()
332 	struct i2c_client *client = data->client;  in stk3310_read_raw()
334 	if (chan->type != IIO_LIGHT && chan->type != IIO_PROXIMITY)  in stk3310_read_raw()
335 		return -EINVAL;  in stk3310_read_raw()
339 		if (chan->type == IIO_LIGHT)  in stk3310_read_raw()
344 		mutex_lock(&data->lock);  in stk3310_read_raw()
345 		ret = regmap_bulk_read(data->regmap, reg, &buf, 2);  in stk3310_read_raw()
347 			dev_err(&client->dev, "register read failed\n");  in stk3310_read_raw()
348 			mutex_unlock(&data->lock);  in stk3310_read_raw()
352 		mutex_unlock(&data->lock);  in stk3310_read_raw()
355 		if (chan->type == IIO_LIGHT)  in stk3310_read_raw()
356 			ret = regmap_field_read(data->reg_als_it, &index);  in stk3310_read_raw()
358 			ret = regmap_field_read(data->reg_ps_it, &index);  in stk3310_read_raw()
366 		if (chan->type == IIO_LIGHT)  in stk3310_read_raw()
367 			ret = regmap_field_read(data->reg_als_gain, &index);  in stk3310_read_raw()
369 			ret = regmap_field_read(data->reg_ps_gain, &index);  in stk3310_read_raw()
378 	return -EINVAL;  in stk3310_read_raw()
389 	if (chan->type != IIO_LIGHT && chan->type != IIO_PROXIMITY)  in stk3310_write_raw()
390 		return -EINVAL;  in stk3310_write_raw()
398 			return -EINVAL;  in stk3310_write_raw()
399 		mutex_lock(&data->lock);  in stk3310_write_raw()
400 		if (chan->type == IIO_LIGHT)  in stk3310_write_raw()
401 			ret = regmap_field_write(data->reg_als_it, index);  in stk3310_write_raw()
403 			ret = regmap_field_write(data->reg_ps_it, index);  in stk3310_write_raw()
405 			dev_err(&data->client->dev,  in stk3310_write_raw()
407 		mutex_unlock(&data->lock);  in stk3310_write_raw()
415 			return -EINVAL;  in stk3310_write_raw()
416 		mutex_lock(&data->lock);  in stk3310_write_raw()
417 		if (chan->type == IIO_LIGHT)  in stk3310_write_raw()
418 			ret = regmap_field_write(data->reg_als_gain, index);  in stk3310_write_raw()
420 			ret = regmap_field_write(data->reg_ps_gain, index);  in stk3310_write_raw()
422 			dev_err(&data->client->dev,  in stk3310_write_raw()
424 		mutex_unlock(&data->lock);  in stk3310_write_raw()
428 	return -EINVAL;  in stk3310_write_raw()
444 	struct i2c_client *client = data->client;  in stk3310_set_state()
446 	/* 3-bit state; 0b100 is not supported. */  in stk3310_set_state()
448 		return -EINVAL;  in stk3310_set_state()
450 	mutex_lock(&data->lock);  in stk3310_set_state()
451 	ret = regmap_field_write(data->reg_state, state);  in stk3310_set_state()
453 		dev_err(&client->dev, "failed to change sensor state\n");  in stk3310_set_state()
456 		data->ps_enabled  = !!(state & STK3310_STATE_EN_PS);  in stk3310_set_state()
457 		data->als_enabled = !!(state & STK3310_STATE_EN_ALS);  in stk3310_set_state()
459 	mutex_unlock(&data->lock);  in stk3310_set_state()
470 	struct i2c_client *client = data->client;  in stk3310_init()
472 	ret = regmap_read(data->regmap, STK3310_REG_ID, &chipid);  in stk3310_init()
480 		dev_err(&client->dev, "invalid chip id: 0x%x\n", chipid);  in stk3310_init()
481 		return -ENODEV;  in stk3310_init()
487 		dev_err(&client->dev, "failed to enable sensor");  in stk3310_init()
492 	ret = regmap_field_write(data->reg_int_ps, STK3310_PSINT_EN);  in stk3310_init()
494 		dev_err(&client->dev, "failed to enable interrupts!\n");  in stk3310_init()
527 	client = data->client;  in stk3310_regmap_init()
530 		dev_err(&client->dev, "regmap initialization failed.\n");  in stk3310_regmap_init()
533 	data->regmap = regmap;  in stk3310_regmap_init()
552 	data->timestamp = iio_get_time_ns(indio_dev);  in stk3310_irq_handler()
567 	mutex_lock(&data->lock);  in stk3310_irq_event_handler()
568 	ret = regmap_field_read(data->reg_flag_nf, &dir);  in stk3310_irq_event_handler()
570 		dev_err(&data->client->dev, "register read failed: %d\n", ret);  in stk3310_irq_event_handler()
577 	iio_push_event(indio_dev, event, data->timestamp);  in stk3310_irq_event_handler()
580 	ret = regmap_field_write(data->reg_flag_psint, 0);  in stk3310_irq_event_handler()
582 		dev_err(&data->client->dev, "failed to reset interrupts\n");  in stk3310_irq_event_handler()
584 	mutex_unlock(&data->lock);  in stk3310_irq_event_handler()
596 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));  in stk3310_probe()
598 		dev_err(&client->dev, "iio allocation failed!\n");  in stk3310_probe()
599 		return -ENOMEM;  in stk3310_probe()
603 	data->client = client;  in stk3310_probe()
606 	device_property_read_u32(&client->dev, "proximity-near-level",  in stk3310_probe()
607 				 &data->ps_near_level);  in stk3310_probe()
609 	mutex_init(&data->lock);  in stk3310_probe()
615 	indio_dev->info = &stk3310_info;  in stk3310_probe()
616 	indio_dev->name = STK3310_DRIVER_NAME;  in stk3310_probe()
617 	indio_dev->modes = INDIO_DIRECT_MODE;  in stk3310_probe()
618 	indio_dev->channels = stk3310_channels;  in stk3310_probe()
619 	indio_dev->num_channels = ARRAY_SIZE(stk3310_channels);  in stk3310_probe()
625 	if (client->irq > 0) {  in stk3310_probe()
626 		ret = devm_request_threaded_irq(&client->dev, client->irq,  in stk3310_probe()
633 			dev_err(&client->dev, "request irq %d failed\n",  in stk3310_probe()
634 				client->irq);  in stk3310_probe()
641 		dev_err(&client->dev, "device_register failed\n");  in stk3310_probe()
675 	if (data->ps_enabled)  in stk3310_resume()
677 	if (data->als_enabled)  in stk3310_resume()
726 MODULE_DESCRIPTION("STK3310 Ambient Light and Proximity Sensor driver");