1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright 2014-2019 Analog Devices Inc.
17 #include "ad7091r-base.h"
48 	struct regulator *vref;  member
90 		return -EINVAL;  in ad7091r_set_mode()
93 	ret = regmap_update_bits(st->map, AD7091R_REG_CONF,  in ad7091r_set_mode()
98 	st->mode = mode;  in ad7091r_set_mode()
109 	ret = regmap_write(st->map, AD7091R_REG_CHANNEL,  in ad7091r_set_channel()
118 	return regmap_read(st->map, AD7091R_REG_RESULT, &dummy);  in ad7091r_set_channel()
132 	ret = regmap_read(st->map, AD7091R_REG_RESULT, &val);  in ad7091r_read_one()
137 		return -EIO;  in ad7091r_read_one()
152 	mutex_lock(&st->lock);  in ad7091r_read_raw()
156 		if (st->mode != AD7091R_MODE_COMMAND) {  in ad7091r_read_raw()
157 			ret = -EBUSY;  in ad7091r_read_raw()
161 		ret = ad7091r_read_one(iio_dev, chan->channel, &read_val);  in ad7091r_read_raw()
170 		if (st->vref) {  in ad7091r_read_raw()
171 			ret = regulator_get_voltage(st->vref);  in ad7091r_read_raw()
177 			*val = st->chip_info->vref_mV;  in ad7091r_read_raw()
180 		*val2 = chan->scan_type.realbits;  in ad7091r_read_raw()
185 		ret = -EINVAL;  in ad7091r_read_raw()
190 	mutex_unlock(&st->lock);  in ad7091r_read_raw()
204 		ret = regmap_read(st->map,  in ad7091r_read_event_config()
205 				  AD7091R_REG_CH_HIGH_LIMIT(chan->channel),  in ad7091r_read_event_config()
211 		ret = regmap_read(st->map,  in ad7091r_read_event_config()
212 				  AD7091R_REG_CH_LOW_LIMIT(chan->channel),  in ad7091r_read_event_config()
218 		return -EINVAL;  in ad7091r_read_event_config()
230 		return regmap_set_bits(st->map, AD7091R_REG_CONF,  in ad7091r_write_event_config()
234 		 * Set thresholds either to 0 or to 2^12 - 1 as appropriate to  in ad7091r_write_event_config()
239 			return regmap_write(st->map,  in ad7091r_write_event_config()
240 					    AD7091R_REG_CH_HIGH_LIMIT(chan->channel),  in ad7091r_write_event_config()
243 			return regmap_write(st->map,  in ad7091r_write_event_config()
244 					    AD7091R_REG_CH_LOW_LIMIT(chan->channel),  in ad7091r_write_event_config()
247 			return -EINVAL;  in ad7091r_write_event_config()
265 			ret = regmap_read(st->map,  in ad7091r_read_event_value()
266 					  AD7091R_REG_CH_HIGH_LIMIT(chan->channel),  in ad7091r_read_event_value()
272 			ret = regmap_read(st->map,  in ad7091r_read_event_value()
273 					  AD7091R_REG_CH_LOW_LIMIT(chan->channel),  in ad7091r_read_event_value()
279 			return -EINVAL;  in ad7091r_read_event_value()
282 		ret = regmap_read(st->map,  in ad7091r_read_event_value()
283 				  AD7091R_REG_CH_HYSTERESIS(chan->channel),  in ad7091r_read_event_value()
289 		return -EINVAL;  in ad7091r_read_event_value()
305 			return regmap_write(st->map,  in ad7091r_write_event_value()
306 					    AD7091R_REG_CH_HIGH_LIMIT(chan->channel),  in ad7091r_write_event_value()
309 			return regmap_write(st->map,  in ad7091r_write_event_value()
310 					    AD7091R_REG_CH_LOW_LIMIT(chan->channel),  in ad7091r_write_event_value()
313 			return -EINVAL;  in ad7091r_write_event_value()
316 		return regmap_write(st->map,  in ad7091r_write_event_value()
317 				    AD7091R_REG_CH_HYSTERESIS(chan->channel),  in ad7091r_write_event_value()
320 		return -EINVAL;  in ad7091r_write_event_value()
340 	ret = regmap_read(st->map, AD7091R_REG_ALERT, &read_val);  in ad7091r_event_handler()
344 	for (i = 0; i < st->chip_info->num_channels; i++) {  in ad7091r_event_handler()
364 	regulator_disable(st->vref);  in ad7091r_remove()
377 		return -ENOMEM;  in ad7091r_probe()
380 	st->dev = dev;  in ad7091r_probe()
381 	st->chip_info = chip_info;  in ad7091r_probe()
382 	st->map = map;  in ad7091r_probe()
384 	iio_dev->name = name;  in ad7091r_probe()
385 	iio_dev->info = &ad7091r_info;  in ad7091r_probe()
386 	iio_dev->modes = INDIO_DIRECT_MODE;  in ad7091r_probe()
388 	iio_dev->num_channels = chip_info->num_channels;  in ad7091r_probe()
389 	iio_dev->channels = chip_info->channels;  in ad7091r_probe()
392 		ret = regmap_update_bits(st->map, AD7091R_REG_CONF,  in ad7091r_probe()
404 	st->vref = devm_regulator_get_optional(dev, "vref");  in ad7091r_probe()
405 	if (IS_ERR(st->vref)) {  in ad7091r_probe()
406 		if (PTR_ERR(st->vref) == -EPROBE_DEFER)  in ad7091r_probe()
407 			return -EPROBE_DEFER;  in ad7091r_probe()
409 		st->vref = NULL;  in ad7091r_probe()
410 		/* Enable internal vref */  in ad7091r_probe()
411 		ret = regmap_set_bits(st->map, AD7091R_REG_CONF,  in ad7091r_probe()
414 			return dev_err_probe(st->dev, ret,  in ad7091r_probe()
415 					     "Error on enable internal reference\n");  in ad7091r_probe()
417 		ret = regulator_enable(st->vref);  in ad7091r_probe()
465 MODULE_DESCRIPTION("Analog Devices AD7091Rx multi-channel converters");