51 static int ad7606_reset(struct ad7606_state *st)  in ad7606_reset()  argument
53 	if (st->gpio_reset) {  in ad7606_reset()
54 		gpiod_set_value(st->gpio_reset, 1);  in ad7606_reset()
56 		gpiod_set_value(st->gpio_reset, 0);  in ad7606_reset()
68 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_reg_access()  local
71 	mutex_lock(&st->lock);  in ad7606_reg_access()
73 		ret = st->bops->reg_read(st, reg);  in ad7606_reg_access()
79 		ret = st->bops->reg_write(st, reg, writeval);  in ad7606_reg_access()
82 	mutex_unlock(&st->lock);  in ad7606_reg_access()
86 static int ad7606_read_samples(struct ad7606_state *st)  in ad7606_read_samples()  argument
88 	unsigned int num = st->chip_info->num_channels - 1;  in ad7606_read_samples()
89 	u16 *data = st->data;  in ad7606_read_samples()
102 	if (st->gpio_frstdata) {  in ad7606_read_samples()
103 		ret = st->bops->read_block(st->dev, 1, data);  in ad7606_read_samples()
107 		if (!gpiod_get_value(st->gpio_frstdata)) {  in ad7606_read_samples()
108 			ad7606_reset(st);  in ad7606_read_samples()
116 	return st->bops->read_block(st->dev, num, data);  in ad7606_read_samples()
123 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_trigger_handler()  local
126 	mutex_lock(&st->lock);  in ad7606_trigger_handler()
128 	ret = ad7606_read_samples(st);  in ad7606_trigger_handler()
130 		iio_push_to_buffers_with_timestamp(indio_dev, st->data,  in ad7606_trigger_handler()
135 	gpiod_set_value(st->gpio_convst, 1);  in ad7606_trigger_handler()
137 	mutex_unlock(&st->lock);  in ad7606_trigger_handler()
144 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_scan_direct()  local
147 	gpiod_set_value(st->gpio_convst, 1);  in ad7606_scan_direct()
148 	ret = wait_for_completion_timeout(&st->completion,  in ad7606_scan_direct()
155 	ret = ad7606_read_samples(st);  in ad7606_scan_direct()
157 		ret = st->data[ch];  in ad7606_scan_direct()
160 	gpiod_set_value(st->gpio_convst, 0);  in ad7606_scan_direct()
172 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_read_raw()  local
188 		if (st->sw_mode_en)  in ad7606_read_raw()
191 		*val2 = st->scale_avail[st->range[ch]];  in ad7606_read_raw()
194 		*val = st->oversampling;  in ad7606_read_raw()
220 	struct ad7606_state *st = iio_priv(indio_dev);  in in_voltage_scale_available_show()  local
222 	return ad7606_show_avail(buf, st->scale_avail, st->num_scales, true);  in in_voltage_scale_available_show()
229 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_write_scale_hw()  local
231 	gpiod_set_value(st->gpio_range, val);  in ad7606_write_scale_hw()
238 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_write_os_hw()  local
243 	gpiod_set_array_value(ARRAY_SIZE(values), st->gpio_os->desc,  in ad7606_write_os_hw()
244 			      st->gpio_os->info, values);  in ad7606_write_os_hw()
247 	if (st->chip_info->os_req_reset)  in ad7606_write_os_hw()
248 		ad7606_reset(st);  in ad7606_write_os_hw()
259 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_write_raw()  local
264 		mutex_lock(&st->lock);  in ad7606_write_raw()
265 		i = find_closest(val2, st->scale_avail, st->num_scales);  in ad7606_write_raw()
266 		if (st->sw_mode_en)  in ad7606_write_raw()
268 		ret = st->write_scale(indio_dev, ch, i);  in ad7606_write_raw()
270 			mutex_unlock(&st->lock);  in ad7606_write_raw()
273 		st->range[ch] = i;  in ad7606_write_raw()
274 		mutex_unlock(&st->lock);  in ad7606_write_raw()
280 		i = find_closest(val, st->oversampling_avail,  in ad7606_write_raw()
281 				 st->num_os_ratios);  in ad7606_write_raw()
282 		mutex_lock(&st->lock);  in ad7606_write_raw()
283 		ret = st->write_os(indio_dev, i);  in ad7606_write_raw()
285 			mutex_unlock(&st->lock);  in ad7606_write_raw()
288 		st->oversampling = st->oversampling_avail[i];  in ad7606_write_raw()
289 		mutex_unlock(&st->lock);  in ad7606_write_raw()
302 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_oversampling_ratio_avail()  local
304 	return ad7606_show_avail(buf, st->oversampling_avail,  in ad7606_oversampling_ratio_avail()
305 				 st->num_os_ratios, false);  in ad7606_oversampling_ratio_avail()
429 static int ad7606_request_gpios(struct ad7606_state *st)  in ad7606_request_gpios()  argument
431 	struct device *dev = st->dev;  in ad7606_request_gpios()
433 	st->gpio_convst = devm_gpiod_get(dev, "adi,conversion-start",  in ad7606_request_gpios()
435 	if (IS_ERR(st->gpio_convst))  in ad7606_request_gpios()
436 		return PTR_ERR(st->gpio_convst);  in ad7606_request_gpios()
438 	st->gpio_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);  in ad7606_request_gpios()
439 	if (IS_ERR(st->gpio_reset))  in ad7606_request_gpios()
440 		return PTR_ERR(st->gpio_reset);  in ad7606_request_gpios()
442 	st->gpio_range = devm_gpiod_get_optional(dev, "adi,range",  in ad7606_request_gpios()
444 	if (IS_ERR(st->gpio_range))  in ad7606_request_gpios()
445 		return PTR_ERR(st->gpio_range);  in ad7606_request_gpios()
447 	st->gpio_standby = devm_gpiod_get_optional(dev, "standby",  in ad7606_request_gpios()
449 	if (IS_ERR(st->gpio_standby))  in ad7606_request_gpios()
450 		return PTR_ERR(st->gpio_standby);  in ad7606_request_gpios()
452 	st->gpio_frstdata = devm_gpiod_get_optional(dev, "adi,first-data",  in ad7606_request_gpios()
454 	if (IS_ERR(st->gpio_frstdata))  in ad7606_request_gpios()
455 		return PTR_ERR(st->gpio_frstdata);  in ad7606_request_gpios()
457 	if (!st->chip_info->oversampling_num)  in ad7606_request_gpios()
460 	st->gpio_os = devm_gpiod_get_array_optional(dev,  in ad7606_request_gpios()
463 	return PTR_ERR_OR_ZERO(st->gpio_os);  in ad7606_request_gpios()
475 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_interrupt()  local
478 		gpiod_set_value(st->gpio_convst, 0);  in ad7606_interrupt()
479 		iio_trigger_poll_chained(st->trig);  in ad7606_interrupt()
481 		complete(&st->completion);  in ad7606_interrupt()
490 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_validate_trigger()  local
492 	if (st->trig != trig)  in ad7606_validate_trigger()
500 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_buffer_postenable()  local
502 	gpiod_set_value(st->gpio_convst, 1);  in ad7606_buffer_postenable()
509 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_buffer_predisable()  local
511 	gpiod_set_value(st->gpio_convst, 0);  in ad7606_buffer_predisable()
561 	struct ad7606_state *st = data;  in ad7606_regulator_disable()  local
563 	regulator_disable(st->reg);  in ad7606_regulator_disable()
570 	struct ad7606_state *st;  in ad7606_probe()  local
574 	indio_dev = devm_iio_device_alloc(dev, sizeof(*st));  in ad7606_probe()
578 	st = iio_priv(indio_dev);  in ad7606_probe()
581 	st->dev = dev;  in ad7606_probe()
582 	mutex_init(&st->lock);  in ad7606_probe()
583 	st->bops = bops;  in ad7606_probe()
584 	st->base_address = base_address;  in ad7606_probe()
586 	st->range[0] = 0;  in ad7606_probe()
587 	st->oversampling = 1;  in ad7606_probe()
588 	st->scale_avail = ad7606_scale_avail;  in ad7606_probe()
589 	st->num_scales = ARRAY_SIZE(ad7606_scale_avail);  in ad7606_probe()
591 	st->reg = devm_regulator_get(dev, "avcc");  in ad7606_probe()
592 	if (IS_ERR(st->reg))  in ad7606_probe()
593 		return PTR_ERR(st->reg);  in ad7606_probe()
595 	ret = regulator_enable(st->reg);  in ad7606_probe()
601 	ret = devm_add_action_or_reset(dev, ad7606_regulator_disable, st);  in ad7606_probe()
605 	st->chip_info = &ad7606_chip_info_tbl[id];  in ad7606_probe()
607 	if (st->chip_info->oversampling_num) {  in ad7606_probe()
608 		st->oversampling_avail = st->chip_info->oversampling_avail;  in ad7606_probe()
609 		st->num_os_ratios = st->chip_info->oversampling_num;  in ad7606_probe()
612 	ret = ad7606_request_gpios(st);  in ad7606_probe()
616 	if (st->gpio_os) {  in ad7606_probe()
617 		if (st->gpio_range)  in ad7606_probe()
622 		if (st->gpio_range)  in ad7606_probe()
629 	indio_dev->channels = st->chip_info->channels;  in ad7606_probe()
630 	indio_dev->num_channels = st->chip_info->num_channels;  in ad7606_probe()
632 	init_completion(&st->completion);  in ad7606_probe()
634 	ret = ad7606_reset(st);  in ad7606_probe()
636 		dev_warn(st->dev, "failed to RESET: no RESET GPIO specified\n");  in ad7606_probe()
639 	if (st->chip_info->init_delay_ms) {  in ad7606_probe()
640 		if (msleep_interruptible(st->chip_info->init_delay_ms))  in ad7606_probe()
644 	st->write_scale = ad7606_write_scale_hw;  in ad7606_probe()
645 	st->write_os = ad7606_write_os_hw;  in ad7606_probe()
647 	if (st->bops->sw_mode_config)  in ad7606_probe()
648 		st->sw_mode_en = device_property_present(st->dev,  in ad7606_probe()
651 	if (st->sw_mode_en) {  in ad7606_probe()
653 		st->scale_avail = ad7616_sw_scale_avail;  in ad7606_probe()
654 		st->num_scales = ARRAY_SIZE(ad7616_sw_scale_avail);  in ad7606_probe()
657 		memset32(st->range, 2, ARRAY_SIZE(st->range));  in ad7606_probe()
660 		ret = st->bops->sw_mode_config(indio_dev);  in ad7606_probe()
665 	st->trig = devm_iio_trigger_alloc(dev, "%s-dev%d",  in ad7606_probe()
667 	if (!st->trig)  in ad7606_probe()
670 	st->trig->ops = &ad7606_trigger_ops;  in ad7606_probe()
671 	st->trig->dev.parent = dev;  in ad7606_probe()
672 	iio_trigger_set_drvdata(st->trig, indio_dev);  in ad7606_probe()
673 	ret = devm_iio_trigger_register(dev, st->trig);  in ad7606_probe()
677 	indio_dev->trig = iio_trigger_get(st->trig);  in ad7606_probe()
703 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_suspend()  local
705 	if (st->gpio_standby) {  in ad7606_suspend()
706 		gpiod_set_value(st->gpio_range, 1);  in ad7606_suspend()
707 		gpiod_set_value(st->gpio_standby, 0);  in ad7606_suspend()
716 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_resume()  local
718 	if (st->gpio_standby) {  in ad7606_resume()
719 		gpiod_set_value(st->gpio_range, st->range[0]);  in ad7606_resume()
720 		gpiod_set_value(st->gpio_standby, 1);  in ad7606_resume()
721 		ad7606_reset(st);  in ad7606_resume()