52 static int ad7606_reset(struct ad7606_state *st)  in ad7606_reset()  argument
54 	if (st->gpio_reset) {  in ad7606_reset()
55 		gpiod_set_value(st->gpio_reset, 1);  in ad7606_reset()
57 		gpiod_set_value(st->gpio_reset, 0);  in ad7606_reset()
69 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_reg_access()  local
72 	mutex_lock(&st->lock);  in ad7606_reg_access()
74 		ret = st->bops->reg_read(st, reg);  in ad7606_reg_access()
80 		ret = st->bops->reg_write(st, reg, writeval);  in ad7606_reg_access()
83 	mutex_unlock(&st->lock);  in ad7606_reg_access()
87 static int ad7606_read_samples(struct ad7606_state *st)  in ad7606_read_samples()  argument
89 	unsigned int num = st->chip_info->num_channels - 1;  in ad7606_read_samples()
90 	u16 *data = st->data;  in ad7606_read_samples()
103 	if (st->gpio_frstdata) {  in ad7606_read_samples()
104 		ret = st->bops->read_block(st->dev, 1, data);  in ad7606_read_samples()
108 		if (!gpiod_get_value(st->gpio_frstdata)) {  in ad7606_read_samples()
109 			ad7606_reset(st);  in ad7606_read_samples()
117 	return st->bops->read_block(st->dev, num, data);  in ad7606_read_samples()
124 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_trigger_handler()  local
127 	mutex_lock(&st->lock);  in ad7606_trigger_handler()
129 	ret = ad7606_read_samples(st);  in ad7606_trigger_handler()
131 		iio_push_to_buffers_with_timestamp(indio_dev, st->data,  in ad7606_trigger_handler()
136 	gpiod_set_value(st->gpio_convst, 1);  in ad7606_trigger_handler()
138 	mutex_unlock(&st->lock);  in ad7606_trigger_handler()
145 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_scan_direct()  local
148 	gpiod_set_value(st->gpio_convst, 1);  in ad7606_scan_direct()
149 	ret = wait_for_completion_timeout(&st->completion,  in ad7606_scan_direct()
156 	ret = ad7606_read_samples(st);  in ad7606_scan_direct()
158 		ret = st->data[ch];  in ad7606_scan_direct()
161 	gpiod_set_value(st->gpio_convst, 0);  in ad7606_scan_direct()
173 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_read_raw()  local
189 		if (st->sw_mode_en)  in ad7606_read_raw()
192 		*val2 = st->scale_avail[st->range[ch]];  in ad7606_read_raw()
195 		*val = st->oversampling;  in ad7606_read_raw()
221 	struct ad7606_state *st = iio_priv(indio_dev);  in in_voltage_scale_available_show()  local
223 	return ad7606_show_avail(buf, st->scale_avail, st->num_scales, true);  in in_voltage_scale_available_show()
230 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_write_scale_hw()  local
232 	gpiod_set_value(st->gpio_range, val);  in ad7606_write_scale_hw()
239 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_write_os_hw()  local
244 	gpiod_set_array_value(ARRAY_SIZE(values), st->gpio_os->desc,  in ad7606_write_os_hw()
245 			      st->gpio_os->info, values);  in ad7606_write_os_hw()
248 	if (st->chip_info->os_req_reset)  in ad7606_write_os_hw()
249 		ad7606_reset(st);  in ad7606_write_os_hw()
260 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_write_raw()  local
265 		mutex_lock(&st->lock);  in ad7606_write_raw()
266 		i = find_closest(val2, st->scale_avail, st->num_scales);  in ad7606_write_raw()
267 		if (st->sw_mode_en)  in ad7606_write_raw()
269 		ret = st->write_scale(indio_dev, ch, i);  in ad7606_write_raw()
271 			mutex_unlock(&st->lock);  in ad7606_write_raw()
274 		st->range[ch] = i;  in ad7606_write_raw()
275 		mutex_unlock(&st->lock);  in ad7606_write_raw()
281 		i = find_closest(val, st->oversampling_avail,  in ad7606_write_raw()
282 				 st->num_os_ratios);  in ad7606_write_raw()
283 		mutex_lock(&st->lock);  in ad7606_write_raw()
284 		ret = st->write_os(indio_dev, i);  in ad7606_write_raw()
286 			mutex_unlock(&st->lock);  in ad7606_write_raw()
289 		st->oversampling = st->oversampling_avail[i];  in ad7606_write_raw()
290 		mutex_unlock(&st->lock);  in ad7606_write_raw()
303 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_oversampling_ratio_avail()  local
305 	return ad7606_show_avail(buf, st->oversampling_avail,  in ad7606_oversampling_ratio_avail()
306 				 st->num_os_ratios, false);  in ad7606_oversampling_ratio_avail()
430 static int ad7606_request_gpios(struct ad7606_state *st)  in ad7606_request_gpios()  argument
432 	struct device *dev = st->dev;  in ad7606_request_gpios()
434 	st->gpio_convst = devm_gpiod_get(dev, "adi,conversion-start",  in ad7606_request_gpios()
436 	if (IS_ERR(st->gpio_convst))  in ad7606_request_gpios()
437 		return PTR_ERR(st->gpio_convst);  in ad7606_request_gpios()
439 	st->gpio_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);  in ad7606_request_gpios()
440 	if (IS_ERR(st->gpio_reset))  in ad7606_request_gpios()
441 		return PTR_ERR(st->gpio_reset);  in ad7606_request_gpios()
443 	st->gpio_range = devm_gpiod_get_optional(dev, "adi,range",  in ad7606_request_gpios()
445 	if (IS_ERR(st->gpio_range))  in ad7606_request_gpios()
446 		return PTR_ERR(st->gpio_range);  in ad7606_request_gpios()
448 	st->gpio_standby = devm_gpiod_get_optional(dev, "standby",  in ad7606_request_gpios()
450 	if (IS_ERR(st->gpio_standby))  in ad7606_request_gpios()
451 		return PTR_ERR(st->gpio_standby);  in ad7606_request_gpios()
453 	st->gpio_frstdata = devm_gpiod_get_optional(dev, "adi,first-data",  in ad7606_request_gpios()
455 	if (IS_ERR(st->gpio_frstdata))  in ad7606_request_gpios()
456 		return PTR_ERR(st->gpio_frstdata);  in ad7606_request_gpios()
458 	if (!st->chip_info->oversampling_num)  in ad7606_request_gpios()
461 	st->gpio_os = devm_gpiod_get_array_optional(dev,  in ad7606_request_gpios()
464 	return PTR_ERR_OR_ZERO(st->gpio_os);  in ad7606_request_gpios()
476 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_interrupt()  local
479 		gpiod_set_value(st->gpio_convst, 0);  in ad7606_interrupt()
480 		iio_trigger_poll_nested(st->trig);  in ad7606_interrupt()
482 		complete(&st->completion);  in ad7606_interrupt()
491 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_validate_trigger()  local
493 	if (st->trig != trig)  in ad7606_validate_trigger()
501 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_buffer_postenable()  local
503 	gpiod_set_value(st->gpio_convst, 1);  in ad7606_buffer_postenable()
510 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_buffer_predisable()  local
512 	gpiod_set_value(st->gpio_convst, 0);  in ad7606_buffer_predisable()
564 	struct ad7606_state *st;  in ad7606_probe()  local
568 	indio_dev = devm_iio_device_alloc(dev, sizeof(*st));  in ad7606_probe()
572 	st = iio_priv(indio_dev);  in ad7606_probe()
575 	st->dev = dev;  in ad7606_probe()
576 	mutex_init(&st->lock);  in ad7606_probe()
577 	st->bops = bops;  in ad7606_probe()
578 	st->base_address = base_address;  in ad7606_probe()
580 	st->range[0] = 0;  in ad7606_probe()
581 	st->oversampling = 1;  in ad7606_probe()
582 	st->scale_avail = ad7606_scale_avail;  in ad7606_probe()
583 	st->num_scales = ARRAY_SIZE(ad7606_scale_avail);  in ad7606_probe()
590 	st->chip_info = &ad7606_chip_info_tbl[id];  in ad7606_probe()
592 	if (st->chip_info->oversampling_num) {  in ad7606_probe()
593 		st->oversampling_avail = st->chip_info->oversampling_avail;  in ad7606_probe()
594 		st->num_os_ratios = st->chip_info->oversampling_num;  in ad7606_probe()
597 	ret = ad7606_request_gpios(st);  in ad7606_probe()
601 	if (st->gpio_os) {  in ad7606_probe()
602 		if (st->gpio_range)  in ad7606_probe()
607 		if (st->gpio_range)  in ad7606_probe()
614 	indio_dev->channels = st->chip_info->channels;  in ad7606_probe()
615 	indio_dev->num_channels = st->chip_info->num_channels;  in ad7606_probe()
617 	init_completion(&st->completion);  in ad7606_probe()
619 	ret = ad7606_reset(st);  in ad7606_probe()
621 		dev_warn(st->dev, "failed to RESET: no RESET GPIO specified\n");  in ad7606_probe()
624 	if (st->chip_info->init_delay_ms) {  in ad7606_probe()
625 		if (msleep_interruptible(st->chip_info->init_delay_ms))  in ad7606_probe()
629 	st->write_scale = ad7606_write_scale_hw;  in ad7606_probe()
630 	st->write_os = ad7606_write_os_hw;  in ad7606_probe()
632 	if (st->bops->sw_mode_config)  in ad7606_probe()
633 		st->sw_mode_en = device_property_present(st->dev,  in ad7606_probe()
636 	if (st->sw_mode_en) {  in ad7606_probe()
638 		st->scale_avail = ad7616_sw_scale_avail;  in ad7606_probe()
639 		st->num_scales = ARRAY_SIZE(ad7616_sw_scale_avail);  in ad7606_probe()
642 		memset32(st->range, 2, ARRAY_SIZE(st->range));  in ad7606_probe()
645 		ret = st->bops->sw_mode_config(indio_dev);  in ad7606_probe()
650 	st->trig = devm_iio_trigger_alloc(dev, "%s-dev%d",  in ad7606_probe()
653 	if (!st->trig)  in ad7606_probe()
656 	st->trig->ops = &ad7606_trigger_ops;  in ad7606_probe()
657 	iio_trigger_set_drvdata(st->trig, indio_dev);  in ad7606_probe()
658 	ret = devm_iio_trigger_register(dev, st->trig);  in ad7606_probe()
662 	indio_dev->trig = iio_trigger_get(st->trig);  in ad7606_probe()
688 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_suspend()  local
690 	if (st->gpio_standby) {  in ad7606_suspend()
691 		gpiod_set_value(st->gpio_range, 1);  in ad7606_suspend()
692 		gpiod_set_value(st->gpio_standby, 0);  in ad7606_suspend()
701 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_resume()  local
703 	if (st->gpio_standby) {  in ad7606_resume()
704 		gpiod_set_value(st->gpio_range, st->range[0]);  in ad7606_resume()
705 		gpiod_set_value(st->gpio_standby, 1);  in ad7606_resume()
706 		ad7606_reset(st);  in ad7606_resume()