1 // SPDX-License-Identifier: GPL-2.0-only
38 	struct gpio_desc	*gpios[3];  member
47 		__be16 sample[2];  member
55 	return spi_read(st->spi, &st->data.sample[0], 2);  in ad7266_wakeup()
61 	return spi_read(st->spi, &st->data.sample[0], 1);  in ad7266_powerdown()
84 	struct iio_dev *indio_dev = pf->indio_dev;  in ad7266_trigger_handler()
88 	ret = spi_read(st->spi, st->data.sample, 4);  in ad7266_trigger_handler()
90 		iio_push_to_buffers_with_timestamp(indio_dev, &st->data,  in ad7266_trigger_handler()
91 			    pf->timestamp);  in ad7266_trigger_handler()
94 	iio_trigger_notify_done(indio_dev->trig);  in ad7266_trigger_handler()
103 	if (st->fixed_addr)  in ad7266_select_input()
106 	switch (st->mode) {  in ad7266_select_input()
119 		gpiod_set_value(st->gpios[i], (bool)(nr & BIT(i)));  in ad7266_select_input()
141 	ret = spi_sync(st->spi, &st->single_msg);  in ad7266_read_single()
142 	*val = be16_to_cpu(st->data.sample[address % 2]);  in ad7266_read_single()
159 		ret = ad7266_read_single(st, val, chan->address);  in ad7266_read_raw()
165 		if (chan->scan_type.sign == 's')  in ad7266_read_raw()
167 					     chan->scan_type.realbits - 1);  in ad7266_read_raw()
171 		scale_mv = st->vref_mv;  in ad7266_read_raw()
172 		if (st->mode == AD7266_MODE_DIFF)  in ad7266_read_raw()
174 		if (st->range == AD7266_RANGE_2VREF)  in ad7266_read_raw()
178 		*val2 = chan->scan_type.realbits;  in ad7266_read_raw()
181 		if (st->range == AD7266_RANGE_2VREF &&  in ad7266_read_raw()
182 			st->mode != AD7266_MODE_DIFF)  in ad7266_read_raw()
188 	return -EINVAL;  in ad7266_read_raw()
368 	is_differential = st->mode != AD7266_MODE_SINGLE_ENDED;  in ad7266_init_channels()
369 	is_signed = (st->range == AD7266_RANGE_2VREF) |  in ad7266_init_channels()
370 		    (st->mode == AD7266_MODE_DIFF);  in ad7266_init_channels()
372 	i = AD7266_CHAN_INFO_INDEX(is_differential, is_signed, st->fixed_addr);  in ad7266_init_channels()
375 	indio_dev->channels = chan_info->channels;  in ad7266_init_channels()
376 	indio_dev->num_channels = chan_info->num_channels;  in ad7266_init_channels()
377 	indio_dev->available_scan_masks = chan_info->scan_masks;  in ad7266_init_channels()
386 	struct ad7266_platform_data *pdata = spi->dev.platform_data;  in ad7266_probe()
392 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in ad7266_probe()
394 		return -ENOMEM;  in ad7266_probe()
398 	ret = devm_regulator_get_enable_read_voltage(&spi->dev, "vref");  in ad7266_probe()
399 	if (ret < 0 && ret != -ENODEV)  in ad7266_probe()
402 	st->vref_mv = ret == -ENODEV ? AD7266_INTERNAL_REF_MV : ret / 1000;  in ad7266_probe()
405 		st->fixed_addr = pdata->fixed_addr;  in ad7266_probe()
406 		st->mode = pdata->mode;  in ad7266_probe()
407 		st->range = pdata->range;  in ad7266_probe()
409 		if (!st->fixed_addr) {  in ad7266_probe()
410 			for (i = 0; i < ARRAY_SIZE(st->gpios); ++i) {  in ad7266_probe()
411 				st->gpios[i] = devm_gpiod_get(&spi->dev,  in ad7266_probe()
414 				if (IS_ERR(st->gpios[i])) {  in ad7266_probe()
415 					ret = PTR_ERR(st->gpios[i]);  in ad7266_probe()
421 		st->fixed_addr = true;  in ad7266_probe()
422 		st->range = AD7266_RANGE_VREF;  in ad7266_probe()
423 		st->mode = AD7266_MODE_DIFF;  in ad7266_probe()
426 	st->spi = spi;  in ad7266_probe()
428 	indio_dev->name = spi_get_device_id(spi)->name;  in ad7266_probe()
429 	indio_dev->modes = INDIO_DIRECT_MODE;  in ad7266_probe()
430 	indio_dev->info = &ad7266_info;  in ad7266_probe()
435 	st->single_xfer[0].rx_buf = &st->data.sample[0];  in ad7266_probe()
436 	st->single_xfer[0].len = 2;  in ad7266_probe()
437 	st->single_xfer[0].cs_change = 1;  in ad7266_probe()
439 	st->single_xfer[1].rx_buf = st->data.sample;  in ad7266_probe()
440 	st->single_xfer[1].len = 4;  in ad7266_probe()
441 	st->single_xfer[1].cs_change = 1;  in ad7266_probe()
443 	st->single_xfer[2].tx_buf = &st->data.sample[0];  in ad7266_probe()
444 	st->single_xfer[2].len = 1;  in ad7266_probe()
446 	spi_message_init(&st->single_msg);  in ad7266_probe()
447 	spi_message_add_tail(&st->single_xfer[0], &st->single_msg);  in ad7266_probe()
448 	spi_message_add_tail(&st->single_xfer[1], &st->single_msg);  in ad7266_probe()
449 	spi_message_add_tail(&st->single_xfer[2], &st->single_msg);  in ad7266_probe()
451 	ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev, &iio_pollfunc_store_time,  in ad7266_probe()
456 	return devm_iio_device_register(&spi->dev, indio_dev);  in ad7266_probe()
475 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");