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_set_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()
120 	if (!data->client->irq)  in sx_common_disable_irq()
122 	return regmap_clear_bits(data->regmap, data->chip_info->reg_irq_msk,  in sx_common_disable_irq()
123 				 irq << data->chip_info->irq_msk_offset);  in sx_common_disable_irq()
133 	if ((data->chan_read | data->chan_event) != channels) {  in sx_common_update_chan_en()
134 		ret = regmap_update_bits(data->regmap,  in sx_common_update_chan_en()
135 					 data->chip_info->reg_enable_chan,  in sx_common_update_chan_en()
136 					 data->chip_info->mask_enable_chan,  in sx_common_update_chan_en()
141 	data->chan_read = chan_read;  in sx_common_update_chan_en()
142 	data->chan_event = chan_event;  in sx_common_update_chan_en()
148 	return sx_common_update_chan_en(data, data->chan_read | BIT(channel),  in sx_common_get_read_channel()
149 				     data->chan_event);  in sx_common_get_read_channel()
154 	return sx_common_update_chan_en(data, data->chan_read & ~BIT(channel),  in sx_common_put_read_channel()
155 				     data->chan_event);  in sx_common_put_read_channel()
160 	return sx_common_update_chan_en(data, data->chan_read,  in sx_common_get_event_channel()
161 				     data->chan_event | BIT(channel));  in sx_common_get_event_channel()
166 	return sx_common_update_chan_en(data, data->chan_read,  in sx_common_put_event_channel()
167 				     data->chan_event & ~BIT(channel));  in sx_common_put_event_channel()
171  * sx_common_read_proximity() - Read raw proximity value.
185 	mutex_lock(&data->mutex);  in sx_common_read_proximity()
187 	ret = sx_common_get_read_channel(data, chan->channel);  in sx_common_read_proximity()
195 	mutex_unlock(&data->mutex);  in sx_common_read_proximity()
197 	if (data->client->irq) {  in sx_common_read_proximity()
198 		ret = wait_for_completion_interruptible(&data->completion);  in sx_common_read_proximity()
199 		reinit_completion(&data->completion);  in sx_common_read_proximity()
201 		ret = data->chip_info->ops.wait_for_sample(data);  in sx_common_read_proximity()
204 	mutex_lock(&data->mutex);  in sx_common_read_proximity()
209 	ret = data->chip_info->ops.read_prox_data(data, chan, &rawval);  in sx_common_read_proximity()
213 	*val = sign_extend32(be16_to_cpu(rawval), chan->scan_type.realbits - 1);  in sx_common_read_proximity()
219 	ret = sx_common_put_read_channel(data, chan->channel);  in sx_common_read_proximity()
223 	mutex_unlock(&data->mutex);  in sx_common_read_proximity()
230 	sx_common_put_read_channel(data, chan->channel);  in sx_common_read_proximity()
232 	mutex_unlock(&data->mutex);  in sx_common_read_proximity()
239  * sx_common_read_event_config() - Configure event setting.
254 	return !!(data->chan_event & BIT(chan->channel));  in sx_common_read_event_config()
259  * sx_common_write_event_config() - Configure event setting.
278 	if (!!(data->chan_event & BIT(chan->channel)) == state)  in sx_common_write_event_config()
281 	mutex_lock(&data->mutex);  in sx_common_write_event_config()
283 		ret = sx_common_get_event_channel(data, chan->channel);  in sx_common_write_event_config()
286 		if (!(data->chan_event & ~BIT(chan->channel))) {  in sx_common_write_event_config()
289 				sx_common_put_event_channel(data, chan->channel);  in sx_common_write_event_config()
292 		ret = sx_common_put_event_channel(data, chan->channel);  in sx_common_write_event_config()
295 		if (!data->chan_event) {  in sx_common_write_event_config()
298 				sx_common_get_event_channel(data, chan->channel);  in sx_common_write_event_config()
303 	mutex_unlock(&data->mutex);  in sx_common_write_event_config()
314 	mutex_lock(&data->mutex);  in sx_common_set_trigger_state()
318 	else if (!data->chan_read)  in sx_common_set_trigger_state()
323 	data->trigger_enabled = state;  in sx_common_set_trigger_state()
326 	mutex_unlock(&data->mutex);  in sx_common_set_trigger_state()
342 	mutex_lock(&data->mutex);  in sx_common_irq_thread_handler()
344 	ret = regmap_read(data->regmap, SX_COMMON_REG_IRQ_SRC, &val);  in sx_common_irq_thread_handler()
346 		dev_err(&data->client->dev, "i2c transfer error in irq\n");  in sx_common_irq_thread_handler()
350 	if (val & ((SX_COMMON_FAR_IRQ | SX_COMMON_CLOSE_IRQ) << data->chip_info->irq_msk_offset))  in sx_common_irq_thread_handler()
353 	if (val & (SX_COMMON_CONVDONE_IRQ << data->chip_info->irq_msk_offset))  in sx_common_irq_thread_handler()
354 		complete(&data->completion);  in sx_common_irq_thread_handler()
357 	mutex_unlock(&data->mutex);  in sx_common_irq_thread_handler()
365 	struct iio_dev *indio_dev = pf->indio_dev;  in sx_common_trigger_handler()
370 	mutex_lock(&data->mutex);  in sx_common_trigger_handler()
373 		ret = data->chip_info->ops.read_prox_data(data,  in sx_common_trigger_handler()
374 						     &indio_dev->channels[bit],  in sx_common_trigger_handler()
379 		data->buffer.channels[i++] = val;  in sx_common_trigger_handler()
382 	iio_push_to_buffers_with_timestamp(indio_dev, &data->buffer,  in sx_common_trigger_handler()
383 					   pf->timestamp);  in sx_common_trigger_handler()
386 	mutex_unlock(&data->mutex);  in sx_common_trigger_handler()
388 	iio_trigger_notify_done(indio_dev->trig);  in sx_common_trigger_handler()
399 	mutex_lock(&data->mutex);  in sx_common_buffer_preenable()
401 		__set_bit(indio_dev->channels[bit].channel, &channels);  in sx_common_buffer_preenable()
403 	ret = sx_common_update_chan_en(data, channels, data->chan_event);  in sx_common_buffer_preenable()
404 	mutex_unlock(&data->mutex);  in sx_common_buffer_preenable()
413 	mutex_lock(&data->mutex);  in sx_common_buffer_postdisable()
414 	ret = sx_common_update_chan_en(data, 0, data->chan_event);  in sx_common_buffer_postdisable()
415 	mutex_unlock(&data->mutex);  in sx_common_buffer_postdisable()
432 	if (!reg_def->property || !adev)  in sx_common_get_raw_register_config()
435 	snprintf(prop, ARRAY_SIZE(prop), "%s,reg_%s", acpi_device_hid(adev), reg_def->property);  in sx_common_get_raw_register_config()
440 	reg_def->def = raw;  in sx_common_get_raw_register_config()
455 	ret = regmap_write(data->regmap, data->chip_info->reg_reset,  in sx_common_init_device()
460 	usleep_range(1000, 2000); /* power-up time is ~1ms. */  in sx_common_init_device()
463 	ret = regmap_read(data->regmap, SX_COMMON_REG_IRQ_SRC, &val);  in sx_common_init_device()
468 	for (i = 0; i < data->chip_info->num_default_regs; i++) {  in sx_common_init_device()
469 		initval = data->chip_info->ops.get_default_reg(dev, i, &tmp);  in sx_common_init_device()
470 		ret = regmap_write(data->regmap, initval->reg, initval->def);  in sx_common_init_device()
475 	return data->chip_info->ops.init_compensation(indio_dev);  in sx_common_init_device()
479  * sx_common_probe() - Common setup for Semtech SAR sensor
489 	struct device *dev = &client->dev;  in sx_common_probe()
496 		return -ENOMEM;  in sx_common_probe()
500 	data->chip_info = chip_info;  in sx_common_probe()
501 	data->client = client;  in sx_common_probe()
502 	mutex_init(&data->mutex);  in sx_common_probe()
503 	init_completion(&data->completion);  in sx_common_probe()
505 	data->regmap = devm_regmap_init_i2c(client, regmap_config);  in sx_common_probe()
506 	if (IS_ERR(data->regmap))  in sx_common_probe()
507 		return dev_err_probe(dev, PTR_ERR(data->regmap),  in sx_common_probe()
518 	ret = data->chip_info->ops.check_whoami(dev, indio_dev);  in sx_common_probe()
522 	indio_dev->modes = INDIO_DIRECT_MODE;  in sx_common_probe()
524 	indio_dev->channels =  data->chip_info->iio_channels;  in sx_common_probe()
525 	indio_dev->num_channels = data->chip_info->num_iio_channels;  in sx_common_probe()
526 	indio_dev->info = &data->chip_info->iio_info;  in sx_common_probe()
534 	if (client->irq) {  in sx_common_probe()
535 		ret = devm_request_threaded_irq(dev, client->irq,  in sx_common_probe()
543 		data->trig = devm_iio_trigger_alloc(dev, "%s-dev%d",  in sx_common_probe()
544 						    indio_dev->name,  in sx_common_probe()
546 		if (!data->trig)  in sx_common_probe()
547 			return -ENOMEM;  in sx_common_probe()
549 		data->trig->ops = &sx_common_trigger_ops;  in sx_common_probe()
550 		iio_trigger_set_drvdata(data->trig, indio_dev);  in sx_common_probe()
552 		ret = devm_iio_trigger_register(dev, data->trig);  in sx_common_probe()