1 // SPDX-License-Identifier: GPL-2.0
5  * Common part of most Semtech SAR sensor.
32 /* All Semtech SAR sensors have IRQ bit in the same order. */
63 	if (data->trigger_enabled)  in sx_common_irq_handler()
64 		iio_trigger_poll(data->trig);  in sx_common_irq_handler()
83 	ret = regmap_read(data->regmap, data->chip_info->reg_stat, &val);  in sx_common_push_events()
85 		dev_err(&data->client->dev, "i2c transfer error in irq\n");  in sx_common_push_events()
89 	val >>= data->chip_info->stat_offset;  in sx_common_push_events()
95 	prox_changed = (data->chan_prox_stat ^ val) & data->chan_event;  in sx_common_push_events()
97 	for_each_set_bit(chan, &prox_changed, data->chip_info->num_channels) {  in sx_common_push_events()
107 	data->chan_prox_stat = val;  in sx_common_push_events()
112 	if (!data->client->irq)  in sx_common_enable_irq()
114 	return regmap_update_bits(data->regmap, data->chip_info->reg_irq_msk,  in sx_common_enable_irq()
115 				  irq << data->chip_info->irq_msk_offset,  in sx_common_enable_irq()
116 				  irq << data->chip_info->irq_msk_offset);  in sx_common_enable_irq()
121 	if (!data->client->irq)  in sx_common_disable_irq()
123 	return regmap_update_bits(data->regmap, data->chip_info->reg_irq_msk,  in sx_common_disable_irq()
124 				  irq << data->chip_info->irq_msk_offset, 0);  in sx_common_disable_irq()
134 	if ((data->chan_read | data->chan_event) != channels) {  in sx_common_update_chan_en()
135 		ret = regmap_update_bits(data->regmap,  in sx_common_update_chan_en()
136 					 data->chip_info->reg_enable_chan,  in sx_common_update_chan_en()
137 					 data->chip_info->mask_enable_chan,  in sx_common_update_chan_en()
142 	data->chan_read = chan_read;  in sx_common_update_chan_en()
143 	data->chan_event = chan_event;  in sx_common_update_chan_en()
149 	return sx_common_update_chan_en(data, data->chan_read | BIT(channel),  in sx_common_get_read_channel()
150 				     data->chan_event);  in sx_common_get_read_channel()
155 	return sx_common_update_chan_en(data, data->chan_read & ~BIT(channel),  in sx_common_put_read_channel()
156 				     data->chan_event);  in sx_common_put_read_channel()
161 	return sx_common_update_chan_en(data, data->chan_read,  in sx_common_get_event_channel()
162 				     data->chan_event | BIT(channel));  in sx_common_get_event_channel()
167 	return sx_common_update_chan_en(data, data->chan_read,  in sx_common_put_event_channel()
168 				     data->chan_event & ~BIT(channel));  in sx_common_put_event_channel()
172  * sx_common_read_proximity() - Read raw proximity value.
186 	mutex_lock(&data->mutex);  in sx_common_read_proximity()
188 	ret = sx_common_get_read_channel(data, chan->channel);  in sx_common_read_proximity()
196 	mutex_unlock(&data->mutex);  in sx_common_read_proximity()
198 	if (data->client->irq) {  in sx_common_read_proximity()
199 		ret = wait_for_completion_interruptible(&data->completion);  in sx_common_read_proximity()
200 		reinit_completion(&data->completion);  in sx_common_read_proximity()
202 		ret = data->chip_info->ops.wait_for_sample(data);  in sx_common_read_proximity()
205 	mutex_lock(&data->mutex);  in sx_common_read_proximity()
210 	ret = data->chip_info->ops.read_prox_data(data, chan, &rawval);  in sx_common_read_proximity()
214 	*val = sign_extend32(be16_to_cpu(rawval), chan->scan_type.realbits - 1);  in sx_common_read_proximity()
220 	ret = sx_common_put_read_channel(data, chan->channel);  in sx_common_read_proximity()
224 	mutex_unlock(&data->mutex);  in sx_common_read_proximity()
231 	sx_common_put_read_channel(data, chan->channel);  in sx_common_read_proximity()
233 	mutex_unlock(&data->mutex);  in sx_common_read_proximity()
240  * sx_common_read_event_config() - Configure event setting.
255 	return !!(data->chan_event & BIT(chan->channel));  in sx_common_read_event_config()
260  * sx_common_write_event_config() - Configure event setting.
279 	if (!!(data->chan_event & BIT(chan->channel)) == state)  in sx_common_write_event_config()
282 	mutex_lock(&data->mutex);  in sx_common_write_event_config()
284 		ret = sx_common_get_event_channel(data, chan->channel);  in sx_common_write_event_config()
287 		if (!(data->chan_event & ~BIT(chan->channel))) {  in sx_common_write_event_config()
290 				sx_common_put_event_channel(data, chan->channel);  in sx_common_write_event_config()
293 		ret = sx_common_put_event_channel(data, chan->channel);  in sx_common_write_event_config()
296 		if (!data->chan_event) {  in sx_common_write_event_config()
299 				sx_common_get_event_channel(data, chan->channel);  in sx_common_write_event_config()
304 	mutex_unlock(&data->mutex);  in sx_common_write_event_config()
315 	mutex_lock(&data->mutex);  in sx_common_set_trigger_state()
319 	else if (!data->chan_read)  in sx_common_set_trigger_state()
324 	data->trigger_enabled = state;  in sx_common_set_trigger_state()
327 	mutex_unlock(&data->mutex);  in sx_common_set_trigger_state()
343 	mutex_lock(&data->mutex);  in sx_common_irq_thread_handler()
345 	ret = regmap_read(data->regmap, SX_COMMON_REG_IRQ_SRC, &val);  in sx_common_irq_thread_handler()
347 		dev_err(&data->client->dev, "i2c transfer error in irq\n");  in sx_common_irq_thread_handler()
351 	if (val & ((SX_COMMON_FAR_IRQ | SX_COMMON_CLOSE_IRQ) << data->chip_info->irq_msk_offset))  in sx_common_irq_thread_handler()
354 	if (val & (SX_COMMON_CONVDONE_IRQ << data->chip_info->irq_msk_offset))  in sx_common_irq_thread_handler()
355 		complete(&data->completion);  in sx_common_irq_thread_handler()
358 	mutex_unlock(&data->mutex);  in sx_common_irq_thread_handler()
366 	struct iio_dev *indio_dev = pf->indio_dev;  in sx_common_trigger_handler()
371 	mutex_lock(&data->mutex);  in sx_common_trigger_handler()
373 	for_each_set_bit(bit, indio_dev->active_scan_mask,  in sx_common_trigger_handler()
374 			 indio_dev->masklength) {  in sx_common_trigger_handler()
375 		ret = data->chip_info->ops.read_prox_data(data,  in sx_common_trigger_handler()
376 						     &indio_dev->channels[bit],  in sx_common_trigger_handler()
381 		data->buffer.channels[i++] = val;  in sx_common_trigger_handler()
384 	iio_push_to_buffers_with_timestamp(indio_dev, &data->buffer,  in sx_common_trigger_handler()
385 					   pf->timestamp);  in sx_common_trigger_handler()
388 	mutex_unlock(&data->mutex);  in sx_common_trigger_handler()
390 	iio_trigger_notify_done(indio_dev->trig);  in sx_common_trigger_handler()
401 	mutex_lock(&data->mutex);  in sx_common_buffer_preenable()
402 	for_each_set_bit(bit, indio_dev->active_scan_mask,  in sx_common_buffer_preenable()
403 			 indio_dev->masklength)  in sx_common_buffer_preenable()
404 		__set_bit(indio_dev->channels[bit].channel, &channels);  in sx_common_buffer_preenable()
406 	ret = sx_common_update_chan_en(data, channels, data->chan_event);  in sx_common_buffer_preenable()
407 	mutex_unlock(&data->mutex);  in sx_common_buffer_preenable()
416 	mutex_lock(&data->mutex);  in sx_common_buffer_postdisable()
417 	ret = sx_common_update_chan_en(data, 0, data->chan_event);  in sx_common_buffer_postdisable()
418 	mutex_unlock(&data->mutex);  in sx_common_buffer_postdisable()
431 	regulator_bulk_disable(ARRAY_SIZE(data->supplies), data->supplies);  in sx_common_regulator_disable()
444 	ret = regmap_write(data->regmap, data->chip_info->reg_reset,  in sx_common_init_device()
449 	usleep_range(1000, 2000); /* power-up time is ~1ms. */  in sx_common_init_device()
452 	ret = regmap_read(data->regmap, SX_COMMON_REG_IRQ_SRC, &val);  in sx_common_init_device()
457 	for (i = 0; i < data->chip_info->num_default_regs; i++) {  in sx_common_init_device()
458 		initval = data->chip_info->ops.get_default_reg(dev, i, &tmp);  in sx_common_init_device()
459 		ret = regmap_write(data->regmap, initval->reg, initval->def);  in sx_common_init_device()
464 	return data->chip_info->ops.init_compensation(indio_dev);  in sx_common_init_device()
468  * sx_common_probe() - Common setup for Semtech SAR sensor
477 	struct device *dev = &client->dev;  in sx_common_probe()
484 		return -ENOMEM;  in sx_common_probe()
488 	data->chip_info = chip_info;  in sx_common_probe()
489 	data->client = client;  in sx_common_probe()
490 	data->supplies[0].supply = "vdd";  in sx_common_probe()
491 	data->supplies[1].supply = "svdd";  in sx_common_probe()
492 	mutex_init(&data->mutex);  in sx_common_probe()
493 	init_completion(&data->completion);  in sx_common_probe()
495 	data->regmap = devm_regmap_init_i2c(client, regmap_config);  in sx_common_probe()
496 	if (IS_ERR(data->regmap))  in sx_common_probe()
497 		return dev_err_probe(dev, PTR_ERR(data->regmap),  in sx_common_probe()
500 	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),  in sx_common_probe()
501 				      data->supplies);  in sx_common_probe()
505 	ret = regulator_bulk_enable(ARRAY_SIZE(data->supplies), data->supplies);  in sx_common_probe()
517 	ret = data->chip_info->ops.check_whoami(dev, indio_dev);  in sx_common_probe()
521 	indio_dev->modes = INDIO_DIRECT_MODE;  in sx_common_probe()
523 	indio_dev->channels =  data->chip_info->iio_channels;  in sx_common_probe()
524 	indio_dev->num_channels = data->chip_info->num_iio_channels;  in sx_common_probe()
525 	indio_dev->info = &data->chip_info->iio_info;  in sx_common_probe()
533 	if (client->irq) {  in sx_common_probe()
534 		ret = devm_request_threaded_irq(dev, client->irq,  in sx_common_probe()
542 		data->trig = devm_iio_trigger_alloc(dev, "%s-dev%d",  in sx_common_probe()
543 						    indio_dev->name,  in sx_common_probe()
545 		if (!data->trig)  in sx_common_probe()
546 			return -ENOMEM;  in sx_common_probe()
548 		data->trig->ops = &sx_common_trigger_ops;  in sx_common_probe()
549 		iio_trigger_set_drvdata(data->trig, indio_dev);  in sx_common_probe()
551 		ret = devm_iio_trigger_register(dev, data->trig);  in sx_common_probe()