1 // SPDX-License-Identifier: GPL-2.0-only
4  * multi-channel Digital to Analog Converters driver
50  * struct ad5360_chip_info - chip specific information
65  * struct ad5360_state - driver instance specific data
68  * @vref_reg:		vref supply regulators
115 		.shift = 16 - (bits),				\
177 	i = channel / st->chip_info->channels_per_group;  in ad5360_get_channel_vref_index()
178 	if (i >= st->chip_info->num_vrefs)  in ad5360_get_channel_vref_index()
179 		i = st->chip_info->num_vrefs - 1;  in ad5360_get_channel_vref_index()
189 	return regulator_get_voltage(st->vref_reg[i].consumer);  in ad5360_get_channel_vref()
201 	st->data[0].d32 = cpu_to_be32(val);  in ad5360_write_unlocked()
203 	return spi_write(st->spi, &st->data[0].d8[1], 3);  in ad5360_write_unlocked()
212 	mutex_lock(&st->lock);  in ad5360_write()
214 	mutex_unlock(&st->lock);  in ad5360_write()
226 			.tx_buf = &st->data[0].d8[1],  in ad5360_read()
230 			.rx_buf = &st->data[1].d8[1],  in ad5360_read()
235 	mutex_lock(&st->lock);  in ad5360_read()
237 	st->data[0].d32 = cpu_to_be32(AD5360_CMD(AD5360_CMD_SPECIAL_FUNCTION) |  in ad5360_read()
242 	ret = spi_sync_transfer(st->spi, t, ARRAY_SIZE(t));  in ad5360_read()
244 		ret = be32_to_cpu(st->data[1].d32) & 0xffff;  in ad5360_read()
246 	mutex_unlock(&st->lock);  in ad5360_read()
258 	return sysfs_emit(buf, "%d\n", (bool)(st->ctrl & AD5360_SF_CTRL_PWR_DOWN));  in ad5360_read_dac_powerdown()
267 	mutex_lock(&st->lock);  in ad5360_update_ctrl()
269 	st->ctrl |= set;  in ad5360_update_ctrl()
270 	st->ctrl &= ~clr;  in ad5360_update_ctrl()
273 			AD5360_REG_SF_CTRL, st->ctrl, 0);  in ad5360_update_ctrl()
275 	mutex_unlock(&st->lock);  in ad5360_update_ctrl()
320 	int max_val = (1 << chan->scan_type.realbits);  in ad5360_write_raw()
326 			return -EINVAL;  in ad5360_write_raw()
329 				 chan->address, val, chan->scan_type.shift);  in ad5360_write_raw()
333 			return -EINVAL;  in ad5360_write_raw()
336 				 chan->address, val, chan->scan_type.shift);  in ad5360_write_raw()
340 			return -EINVAL;  in ad5360_write_raw()
343 				 chan->address, val, chan->scan_type.shift);  in ad5360_write_raw()
346 		if (val <= -max_val || val > 0)  in ad5360_write_raw()
347 			return -EINVAL;  in ad5360_write_raw()
349 		val = -val;  in ad5360_write_raw()
354 		val >>= (chan->scan_type.realbits - 14);  in ad5360_write_raw()
358 		 * channels which share the same vref supply. */  in ad5360_write_raw()
359 		ofs_index = ad5360_get_channel_vref_index(st, chan->channel);  in ad5360_write_raw()
366 	return -EINVAL;  in ad5360_write_raw()
383 			chan->address);  in ad5360_read_raw()
386 		*val = ret >> chan->scan_type.shift;  in ad5360_read_raw()
389 		scale_uv = ad5360_get_channel_vref(st, chan->channel);  in ad5360_read_raw()
393 		/* vout = 4 * vref * dac_code */  in ad5360_read_raw()
395 		*val2 = chan->scan_type.realbits;  in ad5360_read_raw()
399 			chan->address);  in ad5360_read_raw()
406 			chan->address);  in ad5360_read_raw()
412 		ofs_index = ad5360_get_channel_vref_index(st, chan->channel);  in ad5360_read_raw()
418 		ret <<= (chan->scan_type.realbits - 14);  in ad5360_read_raw()
419 		*val = -ret;  in ad5360_read_raw()
423 	return -EINVAL;  in ad5360_read_raw()
442 	channels = kcalloc(st->chip_info->num_channels,  in ad5360_alloc_channels()
446 		return -ENOMEM;  in ad5360_alloc_channels()
448 	for (i = 0; i < st->chip_info->num_channels; ++i) {  in ad5360_alloc_channels()
449 		channels[i] = st->chip_info->channel_template;  in ad5360_alloc_channels()
454 	indio_dev->channels = channels;  in ad5360_alloc_channels()
461 	enum ad5360_type type = spi_get_device_id(spi)->driver_data;  in ad5360_probe()
467 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in ad5360_probe()
469 		dev_err(&spi->dev, "Failed to allocate iio device\n");  in ad5360_probe()
470 		return  -ENOMEM;  in ad5360_probe()
476 	st->chip_info = &ad5360_chip_info_tbl[type];  in ad5360_probe()
477 	st->spi = spi;  in ad5360_probe()
479 	indio_dev->name = spi_get_device_id(spi)->name;  in ad5360_probe()
480 	indio_dev->info = &ad5360_info;  in ad5360_probe()
481 	indio_dev->modes = INDIO_DIRECT_MODE;  in ad5360_probe()
482 	indio_dev->num_channels = st->chip_info->num_channels;  in ad5360_probe()
484 	mutex_init(&st->lock);  in ad5360_probe()
488 		dev_err(&spi->dev, "Failed to allocate channel spec: %d\n", ret);  in ad5360_probe()
492 	for (i = 0; i < st->chip_info->num_vrefs; ++i)  in ad5360_probe()
493 		st->vref_reg[i].supply = ad5360_vref_name[i];  in ad5360_probe()
495 	ret = devm_regulator_bulk_get(&st->spi->dev, st->chip_info->num_vrefs,  in ad5360_probe()
496 		st->vref_reg);  in ad5360_probe()
498 		dev_err(&spi->dev, "Failed to request vref regulators: %d\n", ret);  in ad5360_probe()
502 	ret = regulator_bulk_enable(st->chip_info->num_vrefs, st->vref_reg);  in ad5360_probe()
504 		dev_err(&spi->dev, "Failed to enable vref regulators: %d\n", ret);  in ad5360_probe()
510 		dev_err(&spi->dev, "Failed to register iio device: %d\n", ret);  in ad5360_probe()
517 	regulator_bulk_disable(st->chip_info->num_vrefs, st->vref_reg);  in ad5360_probe()
519 	kfree(indio_dev->channels);  in ad5360_probe()
531 	kfree(indio_dev->channels);  in ad5360_remove()
533 	regulator_bulk_disable(st->chip_info->num_vrefs, st->vref_reg);  in ad5360_remove()
559 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");