1 // SPDX-License-Identifier: GPL-2.0-only
3  * af8133j.c - Voltafield AF8133J magnetometer driver
10 #include <linux/gpio/consumer.h>
15 #include <linux/regulator/consumer.h>
17 #include <linux/iio/iio.h>
18 #include <linux/iio/trigger_consumer.h>
19 #include <linux/iio/triggered_buffer.h>
68 	return &data->orientation;  in af8133j_get_mount_matrix()
103 	struct device *dev = &data->client->dev;  in af8133j_product_check()
107 	ret = regmap_read(data->regmap, AF8133J_REG_PCODE, &val);  in af8133j_product_check()
123 	struct device *dev = &data->client->dev;  in af8133j_reset()
126 	if (data->reset_gpiod) {  in af8133j_reset()
128 		gpiod_set_value_cansleep(data->reset_gpiod, 1);  in af8133j_reset()
130 		gpiod_set_value_cansleep(data->reset_gpiod, 0);  in af8133j_reset()
133 		ret = regmap_write(data->regmap, AF8133J_REG_SWR,  in af8133j_reset()
145 	if (data->range == AF8133J_REG_RANGE_22G) {  in af8133j_reset()
146 		ret = regmap_write(data->regmap, AF8133J_REG_RANGE, data->range);  in af8133j_reset()
156 	gpiod_set_value_cansleep(data->reset_gpiod, 1);  in af8133j_power_down()
157 	regulator_bulk_disable(ARRAY_SIZE(data->supplies), data->supplies);  in af8133j_power_down()
162 	struct device *dev = &data->client->dev;  in af8133j_power_up()
165 	ret = regulator_bulk_enable(ARRAY_SIZE(data->supplies), data->supplies);  in af8133j_power_up()
171 	gpiod_set_value_cansleep(data->reset_gpiod, 0);  in af8133j_power_up()
190 	ret = regmap_write(data->regmap,  in af8133j_take_measurement()
196 	ret = regmap_read_poll_timeout(data->regmap, AF8133J_REG_STATUS, val,  in af8133j_take_measurement()
202 	ret = regmap_write(data->regmap,  in af8133j_take_measurement()
212 	struct device *dev = &data->client->dev;  in af8133j_read_measurement()
220 		 * trigger attached and IIO core keeps trying to do measurements.  in af8133j_read_measurement()
222 		if (ret != -EACCES)  in af8133j_read_measurement()
227 	scoped_guard(mutex, &data->mutex) {  in af8133j_read_measurement()
232 		ret = regmap_bulk_read(data->regmap, AF8133J_REG_OUT,  in af8133j_read_measurement()
262 		*val = sign_extend32(le16_to_cpu(buf[chan->address]),  in af8133j_read_raw()
263 				     chan->scan_type.realbits - 1);  in af8133j_read_raw()
268 		if (data->range == AF8133J_REG_RANGE_12G)  in af8133j_read_raw()
275 		return -EINVAL;  in af8133j_read_raw()
291 		return -EINVAL;  in af8133j_read_avail()
298 	struct device *dev = &data->client->dev;  in af8133j_set_scale()
307 		return -EINVAL;  in af8133j_set_scale()
312 	 * When suspended, just store the new range to data->range to be  in af8133j_set_scale()
316 		scoped_guard(mutex, &data->mutex)  in af8133j_set_scale()
317 			ret = regmap_write(data->regmap,  in af8133j_set_scale()
323 	data->range = range;  in af8133j_set_scale()
337 		return -EINVAL;  in af8133j_write_raw()
358 	struct iio_dev *indio_dev = pf->indio_dev;  in af8133j_trigger_handler()
375 	iio_trigger_notify_done(indio_dev->trig);  in af8133j_trigger_handler()
391 	if (!pm_runtime_status_suspended(&data->client->dev))  in af8133j_power_down_action()
397 	struct device *dev = &client->dev;  in af8133j_probe()
405 		return -ENOMEM;  in af8133j_probe()
414 	data->client = client;  in af8133j_probe()
415 	data->regmap = regmap;  in af8133j_probe()
416 	data->range = AF8133J_REG_RANGE_12G;  in af8133j_probe()
417 	mutex_init(&data->mutex);  in af8133j_probe()
419 	data->reset_gpiod = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);  in af8133j_probe()
420 	if (IS_ERR(data->reset_gpiod))  in af8133j_probe()
421 		return dev_err_probe(dev, PTR_ERR(data->reset_gpiod),  in af8133j_probe()
425 		data->supplies[i].supply = af8133j_supply_names[i];  in af8133j_probe()
426 	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),  in af8133j_probe()
427 				      data->supplies);  in af8133j_probe()
431 	ret = iio_read_mount_matrix(dev, &data->orientation);  in af8133j_probe()
458 	indio_dev->info = &af8133j_info;  in af8133j_probe()
459 	indio_dev->name = "af8133j";  in af8133j_probe()
460 	indio_dev->channels = af8133j_channels;  in af8133j_probe()
461 	indio_dev->num_channels = ARRAY_SIZE(af8133j_channels);  in af8133j_probe()
462 	indio_dev->modes = INDIO_DIRECT_MODE;  in af8133j_probe()
467 		return dev_err_probe(&client->dev, ret,  in af8133j_probe()
468 				     "Failed to setup iio triggered buffer\n");  in af8133j_probe()
472 		return dev_err_probe(dev, ret, "Failed to register iio device");  in af8133j_probe()