1 // SPDX-License-Identifier: GPL-2.0-only
7  *  Author: Lars-Peter Clausen <lars@metafoo.de>
40  * struct ad5449_chip_info - chip specific information
52  * struct ad5449 - driver instance specific data
55  * @vref_reg:		vref supply regulators
92 	mutex_lock(&st->lock);  in ad5449_write()
93 	st->data[0] = cpu_to_be16((addr << 12) | val);  in ad5449_write()
94 	ret = spi_write(st->spi, st->data, 2);  in ad5449_write()
95 	mutex_unlock(&st->lock);  in ad5449_write()
107 			.tx_buf = &st->data[0],  in ad5449_read()
111 			.tx_buf = &st->data[1],  in ad5449_read()
112 			.rx_buf = &st->data[1],  in ad5449_read()
117 	mutex_lock(&st->lock);  in ad5449_read()
118 	st->data[0] = cpu_to_be16(addr << 12);  in ad5449_read()
119 	st->data[1] = cpu_to_be16(AD5449_CMD_NOOP);  in ad5449_read()
121 	ret = spi_sync_transfer(st->spi, t, ARRAY_SIZE(t));  in ad5449_read()
125 	*val = be16_to_cpu(st->data[1]);  in ad5449_read()
128 	mutex_unlock(&st->lock);  in ad5449_read()
142 		if (st->has_sdo) {  in ad5449_read_raw()
144 				AD5449_CMD_READ(chan->address), val);  in ad5449_read_raw()
149 			*val = st->dac_cache[chan->address];  in ad5449_read_raw()
154 		reg = &st->vref_reg[chan->channel];  in ad5449_read_raw()
155 		scale_uv = regulator_get_voltage(reg->consumer);  in ad5449_read_raw()
160 		*val2 = chan->scan_type.realbits;  in ad5449_read_raw()
167 	return -EINVAL;  in ad5449_read_raw()
178 		if (val < 0 || val >= (1 << chan->scan_type.realbits))  in ad5449_write_raw()
179 			return -EINVAL;  in ad5449_write_raw()
182 			AD5449_CMD_LOAD_AND_UPDATE(chan->address),  in ad5449_write_raw()
183 			val << chan->scan_type.shift);  in ad5449_write_raw()
185 			st->dac_cache[chan->address] = val;  in ad5449_write_raw()
188 		ret = -EINVAL;  in ad5449_write_raw()
211 		.shift = 12 - (bits),				\
260 	if (st->chip_info->num_channels == 1)  in ad5449_vref_name()
264 		return "VREFA";  in ad5449_vref_name()
271 	struct ad5449_platform_data *pdata = spi->dev.platform_data;  in ad5449_spi_probe()
278 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in ad5449_spi_probe()
280 		return -ENOMEM;  in ad5449_spi_probe()
285 	st->chip_info = &ad5449_chip_info[id->driver_data];  in ad5449_spi_probe()
286 	st->spi = spi;  in ad5449_spi_probe()
288 	for (i = 0; i < st->chip_info->num_channels; ++i)  in ad5449_spi_probe()
289 		st->vref_reg[i].supply = ad5449_vref_name(st, i);  in ad5449_spi_probe()
291 	ret = devm_regulator_bulk_get(&spi->dev, st->chip_info->num_channels,  in ad5449_spi_probe()
292 				st->vref_reg);  in ad5449_spi_probe()
296 	ret = regulator_bulk_enable(st->chip_info->num_channels, st->vref_reg);  in ad5449_spi_probe()
300 	indio_dev->name = id->name;  in ad5449_spi_probe()
301 	indio_dev->info = &ad5449_info;  in ad5449_spi_probe()
302 	indio_dev->modes = INDIO_DIRECT_MODE;  in ad5449_spi_probe()
303 	indio_dev->channels = st->chip_info->channels;  in ad5449_spi_probe()
304 	indio_dev->num_channels = st->chip_info->num_channels;  in ad5449_spi_probe()
306 	mutex_init(&st->lock);  in ad5449_spi_probe()
308 	if (st->chip_info->has_ctrl) {  in ad5449_spi_probe()
311 			if (pdata->hardware_clear_to_midscale)  in ad5449_spi_probe()
313 			ctrl |= pdata->sdo_mode << AD5449_CTRL_SDO_OFFSET;  in ad5449_spi_probe()
314 			st->has_sdo = pdata->sdo_mode != AD5449_SDO_DISABLED;  in ad5449_spi_probe()
316 			st->has_sdo = true;  in ad5449_spi_probe()
328 	regulator_bulk_disable(st->chip_info->num_channels, st->vref_reg);  in ad5449_spi_probe()
340 	regulator_bulk_disable(st->chip_info->num_channels, st->vref_reg);  in ad5449_spi_remove()
365 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");