313 int ad7606_reset(struct ad7606_state *st)  in ad7606_reset()  argument
315 	if (st->gpio_reset) {  in ad7606_reset()
316 		gpiod_set_value(st->gpio_reset, 1);  in ad7606_reset()
318 		gpiod_set_value(st->gpio_reset, 0);  in ad7606_reset()
329 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_16bit_chan_scale_setup()  local
330 	struct ad7606_chan_scale *cs = &st->chan_scales[ch];  in ad7606_16bit_chan_scale_setup()
332 	if (!st->sw_mode_en) {  in ad7606_16bit_chan_scale_setup()
352 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_get_chan_config()  local
353 	unsigned int num_channels = st->chip_info->num_adc_channels;  in ad7606_get_chan_config()
354 	unsigned int offset = indio_dev->num_channels - st->chip_info->num_adc_channels;  in ad7606_get_chan_config()
355 	struct device *dev = st->dev;  in ad7606_get_chan_config()
408 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606c_18bit_chan_scale_setup()  local
409 	struct ad7606_chan_scale *cs = &st->chan_scales[ch];  in ad7606c_18bit_chan_scale_setup()
413 	if (!st->sw_mode_en) {  in ad7606c_18bit_chan_scale_setup()
465 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606c_16bit_chan_scale_setup()  local
466 	struct ad7606_chan_scale *cs = &st->chan_scales[ch];  in ad7606c_16bit_chan_scale_setup()
470 	if (!st->sw_mode_en) {  in ad7606c_16bit_chan_scale_setup()
523 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7607_chan_scale_setup()  local
524 	struct ad7606_chan_scale *cs = &st->chan_scales[ch];  in ad7607_chan_scale_setup()
535 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7608_chan_scale_setup()  local
536 	struct ad7606_chan_scale *cs = &st->chan_scales[ch];  in ad7608_chan_scale_setup()
547 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7609_chan_scale_setup()  local
548 	struct ad7606_chan_scale *cs = &st->chan_scales[ch];  in ad7609_chan_scale_setup()
561 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_reg_access()  local
564 	guard(mutex)(&st->lock);  in ad7606_reg_access()
567 		ret = st->bops->reg_read(st, reg);  in ad7606_reg_access()
573 		return st->bops->reg_write(st, reg, writeval);  in ad7606_reg_access()
577 static int ad7606_pwm_set_high(struct ad7606_state *st)  in ad7606_pwm_set_high()  argument
582 	pwm_get_state(st->cnvst_pwm, &cnvst_pwm_state);  in ad7606_pwm_set_high()
586 	ret = pwm_apply_might_sleep(st->cnvst_pwm, &cnvst_pwm_state);  in ad7606_pwm_set_high()
591 static int ad7606_pwm_set_low(struct ad7606_state *st)  in ad7606_pwm_set_low()  argument
596 	pwm_get_state(st->cnvst_pwm, &cnvst_pwm_state);  in ad7606_pwm_set_low()
600 	ret = pwm_apply_might_sleep(st->cnvst_pwm, &cnvst_pwm_state);  in ad7606_pwm_set_low()
605 static int ad7606_pwm_set_swing(struct ad7606_state *st)  in ad7606_pwm_set_swing()  argument
609 	pwm_get_state(st->cnvst_pwm, &cnvst_pwm_state);  in ad7606_pwm_set_swing()
613 	return pwm_apply_might_sleep(st->cnvst_pwm, &cnvst_pwm_state);  in ad7606_pwm_set_swing()
616 static bool ad7606_pwm_is_swinging(struct ad7606_state *st)  in ad7606_pwm_is_swinging()  argument
620 	pwm_get_state(st->cnvst_pwm, &cnvst_pwm_state);  in ad7606_pwm_is_swinging()
626 static int ad7606_set_sampling_freq(struct ad7606_state *st, unsigned long freq)  in ad7606_set_sampling_freq()  argument
629 	bool is_swinging = ad7606_pwm_is_swinging(st);  in ad7606_set_sampling_freq()
636 	pwm_get_state(st->cnvst_pwm, &cnvst_pwm_state);  in ad7606_set_sampling_freq()
648 	return pwm_apply_might_sleep(st->cnvst_pwm, &cnvst_pwm_state);  in ad7606_set_sampling_freq()
651 static int ad7606_read_samples(struct ad7606_state *st)  in ad7606_read_samples()  argument
653 	unsigned int num = st->chip_info->num_adc_channels;  in ad7606_read_samples()
655 	return st->bops->read_block(st->dev, num, &st->data);  in ad7606_read_samples()
662 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_trigger_handler()  local
665 	guard(mutex)(&st->lock);  in ad7606_trigger_handler()
667 	ret = ad7606_read_samples(st);  in ad7606_trigger_handler()
671 	iio_push_to_buffers_with_timestamp(indio_dev, &st->data,  in ad7606_trigger_handler()
676 	gpiod_set_value(st->gpio_convst, 1);  in ad7606_trigger_handler()
684 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_scan_direct()  local
685 	unsigned int realbits = st->chip_info->channels[1].scan_type.realbits;  in ad7606_scan_direct()
689 	if (st->gpio_convst) {  in ad7606_scan_direct()
690 		gpiod_set_value(st->gpio_convst, 1);  in ad7606_scan_direct()
692 		ret = ad7606_pwm_set_high(st);  in ad7606_scan_direct()
703 	if (!st->back) {  in ad7606_scan_direct()
704 		ret = wait_for_completion_timeout(&st->completion,  in ad7606_scan_direct()
714 	ret = ad7606_read_samples(st);  in ad7606_scan_direct()
721 			*val = st->data.buf32[ch];  in ad7606_scan_direct()
723 			*val = st->data.buf16[ch];  in ad7606_scan_direct()
726 			*val = sign_extend32(st->data.buf32[ch], realbits - 1);  in ad7606_scan_direct()
728 			*val = sign_extend32(st->data.buf16[ch], realbits - 1);  in ad7606_scan_direct()
732 	if (!st->gpio_convst) {  in ad7606_scan_direct()
733 		ret = ad7606_pwm_set_low(st);  in ad7606_scan_direct()
737 	gpiod_set_value(st->gpio_convst, 0);  in ad7606_scan_direct()
749 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_read_raw()  local
763 		if (st->sw_mode_en)  in ad7606_read_raw()
765 		cs = &st->chan_scales[ch];  in ad7606_read_raw()
770 		*val = st->oversampling;  in ad7606_read_raw()
777 		pwm_get_state(st->cnvst_pwm, &cnvst_pwm_state);  in ad7606_read_raw()
789 	struct ad7606_state *st = iio_priv(indio_dev);  in in_voltage_scale_available_show()  local
790 	struct ad7606_chan_scale *cs = &st->chan_scales[0];  in in_voltage_scale_available_show()
807 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_write_scale_hw()  local
809 	gpiod_set_value(st->gpio_range, val);  in ad7606_write_scale_hw()
816 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_write_os_hw()  local
821 	gpiod_set_array_value(st->gpio_os->ndescs, st->gpio_os->desc,  in ad7606_write_os_hw()
822 			      st->gpio_os->info, values);  in ad7606_write_os_hw()
825 	if (st->chip_info->os_req_reset)  in ad7606_write_os_hw()
826 		ad7606_reset(st);  in ad7606_write_os_hw()
837 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_write_raw()  local
842 	guard(mutex)(&st->lock);  in ad7606_write_raw()
846 		if (st->sw_mode_en)  in ad7606_write_raw()
848 		cs = &st->chan_scales[ch];  in ad7606_write_raw()
855 		ret = st->write_scale(indio_dev, ch, i + cs->reg_offset);  in ad7606_write_raw()
864 		i = find_closest(val, st->oversampling_avail,  in ad7606_write_raw()
865 				 st->num_os_ratios);  in ad7606_write_raw()
866 		ret = st->write_os(indio_dev, i);  in ad7606_write_raw()
869 		st->oversampling = st->oversampling_avail[i];  in ad7606_write_raw()
875 		return ad7606_set_sampling_freq(st, val);  in ad7606_write_raw()
886 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_oversampling_ratio_avail()  local
887 	const unsigned int *vals = st->oversampling_avail;  in ad7606_oversampling_ratio_avail()
891 	for (i = 0; i < st->num_os_ratios; i++)  in ad7606_oversampling_ratio_avail()
929 static int ad7606_request_gpios(struct ad7606_state *st)  in ad7606_request_gpios()  argument
931 	struct device *dev = st->dev;  in ad7606_request_gpios()
933 	st->gpio_convst = devm_gpiod_get_optional(dev, "adi,conversion-start",  in ad7606_request_gpios()
936 	if (IS_ERR(st->gpio_convst))  in ad7606_request_gpios()
937 		return PTR_ERR(st->gpio_convst);  in ad7606_request_gpios()
939 	st->gpio_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);  in ad7606_request_gpios()
940 	if (IS_ERR(st->gpio_reset))  in ad7606_request_gpios()
941 		return PTR_ERR(st->gpio_reset);  in ad7606_request_gpios()
943 	st->gpio_range = devm_gpiod_get_optional(dev, "adi,range",  in ad7606_request_gpios()
945 	if (IS_ERR(st->gpio_range))  in ad7606_request_gpios()
946 		return PTR_ERR(st->gpio_range);  in ad7606_request_gpios()
948 	st->gpio_standby = devm_gpiod_get_optional(dev, "standby",  in ad7606_request_gpios()
950 	if (IS_ERR(st->gpio_standby))  in ad7606_request_gpios()
951 		return PTR_ERR(st->gpio_standby);  in ad7606_request_gpios()
953 	st->gpio_frstdata = devm_gpiod_get_optional(dev, "adi,first-data",  in ad7606_request_gpios()
955 	if (IS_ERR(st->gpio_frstdata))  in ad7606_request_gpios()
956 		return PTR_ERR(st->gpio_frstdata);  in ad7606_request_gpios()
958 	if (!st->chip_info->oversampling_num)  in ad7606_request_gpios()
961 	st->gpio_os = devm_gpiod_get_array_optional(dev,  in ad7606_request_gpios()
964 	return PTR_ERR_OR_ZERO(st->gpio_os);  in ad7606_request_gpios()
976 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_interrupt()  local
980 		if (st->gpio_convst) {  in ad7606_interrupt()
981 			gpiod_set_value(st->gpio_convst, 0);  in ad7606_interrupt()
983 			ret = ad7606_pwm_set_low(st);  in ad7606_interrupt()
985 				dev_err(st->dev, "PWM set low failed");  in ad7606_interrupt()
989 		iio_trigger_poll_nested(st->trig);  in ad7606_interrupt()
991 		complete(&st->completion);  in ad7606_interrupt()
1001 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_validate_trigger()  local
1003 	if (st->trig != trig)  in ad7606_validate_trigger()
1011 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_buffer_postenable()  local
1013 	gpiod_set_value(st->gpio_convst, 1);  in ad7606_buffer_postenable()
1020 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_buffer_predisable()  local
1022 	gpiod_set_value(st->gpio_convst, 0);  in ad7606_buffer_predisable()
1032 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_read_avail()  local
1038 		*vals = st->oversampling_avail;  in ad7606_read_avail()
1039 		*length = st->num_os_ratios;  in ad7606_read_avail()
1045 		if (st->sw_mode_en)  in ad7606_read_avail()
1048 		cs = &st->chan_scales[ch];  in ad7606_read_avail()
1060 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_backend_buffer_postenable()  local
1062 	return ad7606_pwm_set_swing(st);  in ad7606_backend_buffer_postenable()
1067 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_backend_buffer_predisable()  local
1069 	return ad7606_pwm_set_low(st);  in ad7606_backend_buffer_predisable()
1075 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_update_scan_mode()  local
1082 	if (!st->bops->update_scan_mode)  in ad7606_update_scan_mode()
1085 	return st->bops->update_scan_mode(indio_dev, scan_mask);  in ad7606_update_scan_mode()
1143 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_sw_mode_setup()  local
1145 	st->sw_mode_en = st->bops->sw_mode_config &&  in ad7606_sw_mode_setup()
1146 			 device_property_present(st->dev, "adi,sw-mode");  in ad7606_sw_mode_setup()
1147 	if (!st->sw_mode_en)  in ad7606_sw_mode_setup()
1152 	return st->bops->sw_mode_config(indio_dev);  in ad7606_sw_mode_setup()
1157 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_chan_scales_setup()  local
1158 	unsigned int offset = indio_dev->num_channels - st->chip_info->num_adc_channels;  in ad7606_chan_scales_setup()
1165 	chans = devm_kzalloc(st->dev, size, GFP_KERNEL);  in ad7606_chan_scales_setup()
1172 	for (ch = 0; ch < st->chip_info->num_adc_channels; ch++) {  in ad7606_chan_scales_setup()
1173 		ret = st->chip_info->scale_setup_cb(indio_dev, &chans[ch + offset], ch);  in ad7606_chan_scales_setup()
1190 	struct ad7606_state *st;  in ad7606_probe()  local
1194 	indio_dev = devm_iio_device_alloc(dev, sizeof(*st));  in ad7606_probe()
1198 	st = iio_priv(indio_dev);  in ad7606_probe()
1201 	st->dev = dev;  in ad7606_probe()
1202 	mutex_init(&st->lock);  in ad7606_probe()
1203 	st->bops = bops;  in ad7606_probe()
1204 	st->base_address = base_address;  in ad7606_probe()
1205 	st->oversampling = 1;  in ad7606_probe()
1212 	st->chip_info = chip_info;  in ad7606_probe()
1214 	if (st->chip_info->oversampling_num) {  in ad7606_probe()
1215 		st->oversampling_avail = st->chip_info->oversampling_avail;  in ad7606_probe()
1216 		st->num_os_ratios = st->chip_info->oversampling_num;  in ad7606_probe()
1219 	ret = ad7606_request_gpios(st);  in ad7606_probe()
1223 	if (st->gpio_os) {  in ad7606_probe()
1224 		if (st->gpio_range)  in ad7606_probe()
1229 		if (st->gpio_range)  in ad7606_probe()
1236 	indio_dev->channels = st->chip_info->channels;  in ad7606_probe()
1237 	indio_dev->num_channels = st->chip_info->num_channels;  in ad7606_probe()
1239 	ret = ad7606_reset(st);  in ad7606_probe()
1241 		dev_warn(st->dev, "failed to RESET: no RESET GPIO specified\n");  in ad7606_probe()
1244 	if (st->chip_info->init_delay_ms) {  in ad7606_probe()
1245 		if (msleep_interruptible(st->chip_info->init_delay_ms))  in ad7606_probe()
1249 	st->write_scale = ad7606_write_scale_hw;  in ad7606_probe()
1250 	st->write_os = ad7606_write_os_hw;  in ad7606_probe()
1261 	if (!st->gpio_convst) {  in ad7606_probe()
1262 		st->cnvst_pwm = devm_pwm_get(dev, NULL);  in ad7606_probe()
1263 		if (IS_ERR(st->cnvst_pwm))  in ad7606_probe()
1264 			return PTR_ERR(st->cnvst_pwm);  in ad7606_probe()
1267 		ret = ad7606_set_sampling_freq(st, 1 * MEGA);  in ad7606_probe()
1271 		ret = ad7606_pwm_set_low(st);  in ad7606_probe()
1281 					       st->cnvst_pwm);  in ad7606_probe()
1286 	if (st->bops->iio_backend_config) {  in ad7606_probe()
1291 		ret = ad7606_set_sampling_freq(st,  in ad7606_probe()
1296 		ret = st->bops->iio_backend_config(dev, indio_dev);  in ad7606_probe()
1304 		if (!st->gpio_convst)  in ad7606_probe()
1308 		init_completion(&st->completion);  in ad7606_probe()
1309 		st->trig = devm_iio_trigger_alloc(dev, "%s-dev%d",  in ad7606_probe()
1312 		if (!st->trig)  in ad7606_probe()
1315 		st->trig->ops = &ad7606_trigger_ops;  in ad7606_probe()
1316 		iio_trigger_set_drvdata(st->trig, indio_dev);  in ad7606_probe()
1317 		ret = devm_iio_trigger_register(dev, st->trig);  in ad7606_probe()
1321 		indio_dev->trig = iio_trigger_get(st->trig);  in ad7606_probe()
1346 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_suspend()  local
1348 	if (st->gpio_standby) {  in ad7606_suspend()
1349 		gpiod_set_value(st->gpio_range, 1);  in ad7606_suspend()
1350 		gpiod_set_value(st->gpio_standby, 1);  in ad7606_suspend()
1359 	struct ad7606_state *st = iio_priv(indio_dev);  in ad7606_resume()  local
1361 	if (st->gpio_standby) {  in ad7606_resume()
1362 		gpiod_set_value(st->gpio_range, st->chan_scales[0].range);  in ad7606_resume()
1363 		gpiod_set_value(st->gpio_standby, 1);  in ad7606_resume()
1364 		ad7606_reset(st);  in ad7606_resume()