1 // SPDX-License-Identifier: GPL-2.0-only
3  * Driver for the Allegro MicroSystems ALS31300 3-D Linear Hall Effect Sensor
104 /* The whole measure is split into 2x32-bit registers, we need to read them both at once */
111 	guard(mutex)(&data->mutex);  in als31300_get_measure()
113 	ret = pm_runtime_resume_and_get(data->dev);  in als31300_get_measure()
125 				data->map, ALS31300_VOL_MSB, buf, ARRAY_SIZE(buf));  in als31300_get_measure()
132 		dev_err(data->dev, "read data failed, error %d\n", ret);  in als31300_get_measure()
143 	pm_runtime_mark_last_busy(data->dev);  in als31300_get_measure()
144 	pm_runtime_put_autosuspend(data->dev);  in als31300_get_measure()
165 		switch (chan->address) {  in als31300_read_raw()
179 			return -EINVAL;  in als31300_read_raw()
182 		switch (chan->type) {  in als31300_read_raw()
186 			 *         1000 * 302 * (value - 1708)  in als31300_read_raw()
187 			 * temp = ----------------------------  in als31300_read_raw()
198 			 * - 500 GAUSS <-> 4 LSB/Gauss  in als31300_read_raw()
199 			 * - 1000 GAUSS <-> 2 LSB/Gauss  in als31300_read_raw()
200 			 * - 2000 GAUSS <-> 1 LSB/Gauss  in als31300_read_raw()
208 			*val2 = data->variant_info->sensitivity;  in als31300_read_raw()
211 			return -EINVAL;  in als31300_read_raw()
214 		switch (chan->type) {  in als31300_read_raw()
216 			*val = -1708;  in als31300_read_raw()
219 			return -EINVAL;  in als31300_read_raw()
222 		return -EINVAL;  in als31300_read_raw()
229 	struct iio_dev *indio_dev = pf->indio_dev;  in als31300_trigger_handler()
249 					   pf->timestamp);  in als31300_trigger_handler()
252 	iio_trigger_notify_done(indio_dev->trig);  in als31300_trigger_handler()
304 	ret = regmap_update_bits(data->map, ALS31300_VOL_MODE,  in als31300_set_operating_mode()
307 		dev_err(data->dev, "failed to set operating mode (%pe)\n", ERR_PTR(ret));  in als31300_set_operating_mode()
311 	/* The time it takes to exit sleep mode is equivalent to Power-On Delay Time */  in als31300_set_operating_mode()
341 	struct device *dev = &i2c->dev;  in als31300_probe()
348 		return -ENOMEM;  in als31300_probe()
351 	data->dev = dev;  in als31300_probe()
354 	ret = devm_mutex_init(dev, &data->mutex);  in als31300_probe()
358 	data->variant_info = i2c_get_match_data(i2c);  in als31300_probe()
359 	if (!data->variant_info)  in als31300_probe()
360 		return -EINVAL;  in als31300_probe()
362 	data->map = devm_regmap_init_i2c(i2c, &als31300_regmap_config);  in als31300_probe()
363 	if (IS_ERR(data->map))  in als31300_probe()
364 		return dev_err_probe(dev, PTR_ERR(data->map),  in als31300_probe()
379 	indio_dev->info = &als31300_info;  in als31300_probe()
380 	indio_dev->modes = INDIO_DIRECT_MODE;  in als31300_probe()
381 	indio_dev->name = i2c->name;  in als31300_probe()
382 	indio_dev->channels = als31300_channels;  in als31300_probe()
383 	indio_dev->num_channels = ARRAY_SIZE(als31300_channels);  in als31300_probe()
384 	indio_dev->available_scan_masks = als31300_scan_masks;  in als31300_probe()
449 		.name = "als31300-500",
453 		.name = "als31300-1000",
457 		.name = "als31300-2000",
466 		.compatible = "allegromicro,als31300-500",
470 		.compatible = "allegromicro,als31300-1000",
474 		.compatible = "allegromicro,als31300-2000",
493 MODULE_DESCRIPTION("ALS31300 3-D Linear Hall Effect Driver");