1 // SPDX-License-Identifier: GPL-2.0-only
47 #define EXTRACT(val, dec, bits)		(((val) >> (dec)) & ((1 << (bits)) - 1))
97 			.shift = 12 - (bits),				\
172 	for_each_set_bit(i, active_scan_mask, indio_dev->num_channels - 1) {  in ad7923_update_scan_mode()
175 			st->settings;  in ad7923_update_scan_mode()
177 		st->tx_buf[len++] = cpu_to_be16(cmd);  in ad7923_update_scan_mode()
180 	st->ring_xfer[0].tx_buf = &st->tx_buf[0];  in ad7923_update_scan_mode()
181 	st->ring_xfer[0].len = len;  in ad7923_update_scan_mode()
182 	st->ring_xfer[0].cs_change = 1;  in ad7923_update_scan_mode()
184 	spi_message_init(&st->ring_msg);  in ad7923_update_scan_mode()
185 	spi_message_add_tail(&st->ring_xfer[0], &st->ring_msg);  in ad7923_update_scan_mode()
188 		st->ring_xfer[i + 1].rx_buf = &st->rx_buf[i];  in ad7923_update_scan_mode()
189 		st->ring_xfer[i + 1].len = 2;  in ad7923_update_scan_mode()
190 		st->ring_xfer[i + 1].cs_change = 1;  in ad7923_update_scan_mode()
191 		spi_message_add_tail(&st->ring_xfer[i + 1], &st->ring_msg);  in ad7923_update_scan_mode()
194 	st->ring_xfer[i + 1].cs_change = 0;  in ad7923_update_scan_mode()
199 static irqreturn_t ad7923_trigger_handler(int irq, void *p)  in ad7923_trigger_handler()  argument
201 	struct iio_poll_func *pf = p;  in ad7923_trigger_handler()
202 	struct iio_dev *indio_dev = pf->indio_dev;  in ad7923_trigger_handler()
206 	b_sent = spi_sync(st->spi, &st->ring_msg);  in ad7923_trigger_handler()
210 	iio_push_to_buffers_with_timestamp(indio_dev, st->rx_buf,  in ad7923_trigger_handler()
214 	iio_trigger_notify_done(indio_dev->trig);  in ad7923_trigger_handler()
225 		st->settings;  in ad7923_scan_direct()
227 	st->tx_buf[0] = cpu_to_be16(cmd);  in ad7923_scan_direct()
229 	ret = spi_sync(st->spi, &st->scan_single_msg);  in ad7923_scan_direct()
233 	return be16_to_cpu(st->rx_buf[0]);  in ad7923_scan_direct()
238 	int vref;  in ad7923_get_range()  local
240 	vref = regulator_get_voltage(st->reg);  in ad7923_get_range()
241 	if (vref < 0)  in ad7923_get_range()
242 		return vref;  in ad7923_get_range()
244 	vref /= 1000;  in ad7923_get_range()
246 	if (!(st->settings & AD7923_RANGE))  in ad7923_get_range()
247 		vref *= 2;  in ad7923_get_range()
249 	return vref;  in ad7923_get_range()
266 		ret = ad7923_scan_direct(st, chan->address);  in ad7923_read_raw()
272 		if (chan->address == EXTRACT(ret, 12, 4))  in ad7923_read_raw()
273 			*val = EXTRACT(ret, chan->scan_type.shift,  in ad7923_read_raw()
274 				       chan->scan_type.realbits);  in ad7923_read_raw()
276 			return -EIO;  in ad7923_read_raw()
284 		*val2 = chan->scan_type.realbits;  in ad7923_read_raw()
287 	return -EINVAL;  in ad7923_read_raw()
299 	regulator_disable(st->reg);  in ad7923_regulator_disable()
310 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in ad7923_probe()
312 		return -ENOMEM;  in ad7923_probe()
316 	if (device_property_read_bool(&spi->dev, "adi,range-double"))  in ad7923_probe()
319 	st->spi = spi;  in ad7923_probe()
320 	st->settings = AD7923_CODING | ad7923_range |  in ad7923_probe()
323 	info = &ad7923_chip_info[spi_get_device_id(spi)->driver_data];  in ad7923_probe()
325 	indio_dev->name = spi_get_device_id(spi)->name;  in ad7923_probe()
326 	indio_dev->modes = INDIO_DIRECT_MODE;  in ad7923_probe()
327 	indio_dev->channels = info->channels;  in ad7923_probe()
328 	indio_dev->num_channels = info->num_channels;  in ad7923_probe()
329 	indio_dev->info = &ad7923_info;  in ad7923_probe()
333 	st->scan_single_xfer[0].tx_buf = &st->tx_buf[0];  in ad7923_probe()
334 	st->scan_single_xfer[0].len = 2;  in ad7923_probe()
335 	st->scan_single_xfer[0].cs_change = 1;  in ad7923_probe()
336 	st->scan_single_xfer[1].rx_buf = &st->rx_buf[0];  in ad7923_probe()
337 	st->scan_single_xfer[1].len = 2;  in ad7923_probe()
339 	spi_message_init(&st->scan_single_msg);  in ad7923_probe()
340 	spi_message_add_tail(&st->scan_single_xfer[0], &st->scan_single_msg);  in ad7923_probe()
341 	spi_message_add_tail(&st->scan_single_xfer[1], &st->scan_single_msg);  in ad7923_probe()
343 	st->reg = devm_regulator_get(&spi->dev, "refin");  in ad7923_probe()
344 	if (IS_ERR(st->reg))  in ad7923_probe()
345 		return PTR_ERR(st->reg);  in ad7923_probe()
347 	ret = regulator_enable(st->reg);  in ad7923_probe()
351 	ret = devm_add_action_or_reset(&spi->dev, ad7923_regulator_disable, st);  in ad7923_probe()
355 	ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev, NULL,  in ad7923_probe()
360 	return devm_iio_device_register(&spi->dev, indio_dev);  in ad7923_probe()
398 MODULE_AUTHOR("Patrick Vasseur <patrick.vasseur@c-s.fr>");