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.
61 		data->reg_##name =					    \
62 			devm_regmap_field_alloc(&client->dev, regmap,	    \
64 		if (IS_ERR(data->reg_##name)) {				    \
65 			dev_err(&client->dev, "reg field alloc failed.\n"); \
66 			return PTR_ERR(data->reg_##name);		    \
97 /* Estimate maximum proximity values with regard to measurement scale. */
136 	/* Proximity event */
143 	/* Out-of-proximity event */
159 	return sprintf(buf, "%u\n", data->ps_near_level);  in stk3310_read_near_level()
220 	return -ENODEV;  in stk3310_check_chip_id()
233 	return -EINVAL;  in stk3310_get_index()
249 		return -EINVAL;  in stk3310_read_event()
251 	/* Only proximity interrupts are implemented at the moment. */  in stk3310_read_event()
257 		return -EINVAL;  in stk3310_read_event()
259 	mutex_lock(&data->lock);  in stk3310_read_event()
260 	ret = regmap_bulk_read(data->regmap, reg, &buf, 2);  in stk3310_read_event()
261 	mutex_unlock(&data->lock);  in stk3310_read_event()
263 		dev_err(&data->client->dev, "register read failed\n");  in stk3310_read_event()
283 	struct i2c_client *client = data->client;  in stk3310_write_event()
285 	ret = regmap_field_read(data->reg_ps_gain, &index);  in stk3310_write_event()
290 		return -EINVAL;  in stk3310_write_event()
297 		return -EINVAL;  in stk3310_write_event()
300 	ret = regmap_bulk_write(data->regmap, reg, &buf, 2);  in stk3310_write_event()
302 		dev_err(&client->dev, "failed to set PS threshold!\n");  in stk3310_write_event()
316 	ret = regmap_field_read(data->reg_int_ps, &event_val);  in stk3310_read_event_config()
331 	struct i2c_client *client = data->client;  in stk3310_write_event_config()
334 	mutex_lock(&data->lock);  in stk3310_write_event_config()
335 	ret = regmap_field_write(data->reg_int_ps, state);  in stk3310_write_event_config()
337 		dev_err(&client->dev, "failed to set interrupt mode\n");  in stk3310_write_event_config()
338 	mutex_unlock(&data->lock);  in stk3310_write_event_config()
352 	struct i2c_client *client = data->client;  in stk3310_read_raw()
354 	if (chan->type != IIO_LIGHT && chan->type != IIO_PROXIMITY)  in stk3310_read_raw()
355 		return -EINVAL;  in stk3310_read_raw()
359 		if (chan->type == IIO_LIGHT)  in stk3310_read_raw()
364 		mutex_lock(&data->lock);  in stk3310_read_raw()
365 		ret = regmap_bulk_read(data->regmap, reg, &buf, 2);  in stk3310_read_raw()
367 			dev_err(&client->dev, "register read failed\n");  in stk3310_read_raw()
368 			mutex_unlock(&data->lock);  in stk3310_read_raw()
372 		mutex_unlock(&data->lock);  in stk3310_read_raw()
375 		if (chan->type == IIO_LIGHT)  in stk3310_read_raw()
376 			ret = regmap_field_read(data->reg_als_it, &index);  in stk3310_read_raw()
378 			ret = regmap_field_read(data->reg_ps_it, &index);  in stk3310_read_raw()
386 		if (chan->type == IIO_LIGHT)  in stk3310_read_raw()
387 			ret = regmap_field_read(data->reg_als_gain, &index);  in stk3310_read_raw()
389 			ret = regmap_field_read(data->reg_ps_gain, &index);  in stk3310_read_raw()
398 	return -EINVAL;  in stk3310_read_raw()
409 	if (chan->type != IIO_LIGHT && chan->type != IIO_PROXIMITY)  in stk3310_write_raw()
410 		return -EINVAL;  in stk3310_write_raw()
418 			return -EINVAL;  in stk3310_write_raw()
419 		mutex_lock(&data->lock);  in stk3310_write_raw()
420 		if (chan->type == IIO_LIGHT)  in stk3310_write_raw()
421 			ret = regmap_field_write(data->reg_als_it, index);  in stk3310_write_raw()
423 			ret = regmap_field_write(data->reg_ps_it, index);  in stk3310_write_raw()
425 			dev_err(&data->client->dev,  in stk3310_write_raw()
427 		mutex_unlock(&data->lock);  in stk3310_write_raw()
435 			return -EINVAL;  in stk3310_write_raw()
436 		mutex_lock(&data->lock);  in stk3310_write_raw()
437 		if (chan->type == IIO_LIGHT)  in stk3310_write_raw()
438 			ret = regmap_field_write(data->reg_als_gain, index);  in stk3310_write_raw()
440 			ret = regmap_field_write(data->reg_ps_gain, index);  in stk3310_write_raw()
442 			dev_err(&data->client->dev,  in stk3310_write_raw()
444 		mutex_unlock(&data->lock);  in stk3310_write_raw()
448 	return -EINVAL;  in stk3310_write_raw()
464 	struct i2c_client *client = data->client;  in stk3310_set_state()
466 	/* 3-bit state; 0b100 is not supported. */  in stk3310_set_state()
468 		return -EINVAL;  in stk3310_set_state()
470 	mutex_lock(&data->lock);  in stk3310_set_state()
471 	ret = regmap_field_write(data->reg_state, state);  in stk3310_set_state()
473 		dev_err(&client->dev, "failed to change sensor state\n");  in stk3310_set_state()
476 		data->ps_enabled  = !!(state & STK3310_STATE_EN_PS);  in stk3310_set_state()
477 		data->als_enabled = !!(state & STK3310_STATE_EN_ALS);  in stk3310_set_state()
479 	mutex_unlock(&data->lock);  in stk3310_set_state()
490 	struct i2c_client *client = data->client;  in stk3310_init()
492 	ret = regmap_read(data->regmap, STK3310_REG_ID, &chipid);  in stk3310_init()
498 		dev_info(&client->dev, "new unknown chip id: 0x%x\n", chipid);  in stk3310_init()
503 		dev_err(&client->dev, "failed to enable sensor");  in stk3310_init()
508 	ret = regmap_field_write(data->reg_int_ps, STK3310_PSINT_EN);  in stk3310_init()
510 		dev_err(&client->dev, "failed to enable interrupts!\n");  in stk3310_init()
543 	client = data->client;  in stk3310_regmap_init()
546 		dev_err(&client->dev, "regmap initialization failed.\n");  in stk3310_regmap_init()
549 	data->regmap = regmap;  in stk3310_regmap_init()
568 	data->timestamp = iio_get_time_ns(indio_dev);  in stk3310_irq_handler()
583 	mutex_lock(&data->lock);  in stk3310_irq_event_handler()
584 	ret = regmap_field_read(data->reg_flag_nf, &dir);  in stk3310_irq_event_handler()
586 		dev_err(&data->client->dev, "register read failed: %d\n", ret);  in stk3310_irq_event_handler()
593 	iio_push_event(indio_dev, event, data->timestamp);  in stk3310_irq_event_handler()
596 	ret = regmap_field_write(data->reg_flag_psint, 0);  in stk3310_irq_event_handler()
598 		dev_err(&data->client->dev, "failed to reset interrupts\n");  in stk3310_irq_event_handler()
600 	mutex_unlock(&data->lock);  in stk3310_irq_event_handler()
611 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));  in stk3310_probe()
613 		dev_err(&client->dev, "iio allocation failed!\n");  in stk3310_probe()
614 		return -ENOMEM;  in stk3310_probe()
618 	data->client = client;  in stk3310_probe()
621 	device_property_read_u32(&client->dev, "proximity-near-level",  in stk3310_probe()
622 				 &data->ps_near_level);  in stk3310_probe()
624 	mutex_init(&data->lock);  in stk3310_probe()
630 	indio_dev->info = &stk3310_info;  in stk3310_probe()
631 	indio_dev->name = STK3310_DRIVER_NAME;  in stk3310_probe()
632 	indio_dev->modes = INDIO_DIRECT_MODE;  in stk3310_probe()
633 	indio_dev->channels = stk3310_channels;  in stk3310_probe()
634 	indio_dev->num_channels = ARRAY_SIZE(stk3310_channels);  in stk3310_probe()
640 	if (client->irq > 0) {  in stk3310_probe()
641 		ret = devm_request_threaded_irq(&client->dev, client->irq,  in stk3310_probe()
648 			dev_err(&client->dev, "request irq %d failed\n",  in stk3310_probe()
649 				client->irq);  in stk3310_probe()
656 		dev_err(&client->dev, "device_register failed\n");  in stk3310_probe()
690 	if (data->ps_enabled)  in stk3310_resume()
692 	if (data->als_enabled)  in stk3310_resume()
743 MODULE_DESCRIPTION("STK3310 Ambient Light and Proximity Sensor driver");