1 // SPDX-License-Identifier: GPL-2.0-only
37 	struct gpio_desc	*gpios[3];  member
54 	return spi_read(st->spi, &st->data.sample[0], 2);  in ad7266_wakeup()
60 	return spi_read(st->spi, &st->data.sample[0], 1);  in ad7266_powerdown()
83 	struct iio_dev *indio_dev = pf->indio_dev;  in ad7266_trigger_handler()
87 	ret = spi_read(st->spi, st->data.sample, 4);  in ad7266_trigger_handler()
89 		iio_push_to_buffers_with_timestamp(indio_dev, &st->data,  in ad7266_trigger_handler()
90 			    pf->timestamp);  in ad7266_trigger_handler()
93 	iio_trigger_notify_done(indio_dev->trig);  in ad7266_trigger_handler()
98 static void ad7266_select_input(struct ad7266_state *st, unsigned int nr)  in ad7266_select_input()  argument
102 	if (st->fixed_addr)  in ad7266_select_input()
105 	switch (st->mode) {  in ad7266_select_input()
107 		nr >>= 1;  in ad7266_select_input()
110 		nr |= 1;  in ad7266_select_input()
113 		nr &= ~1;  in ad7266_select_input()
118 		gpiod_set_value(st->gpios[i], (bool)(nr & BIT(i)));  in ad7266_select_input()
125 	unsigned int nr = find_first_bit(scan_mask, indio_dev->masklength);  in ad7266_update_scan_mode()  local
127 	ad7266_select_input(st, nr);  in ad7266_update_scan_mode()
139 	ret = spi_sync(st->spi, &st->single_msg);  in ad7266_read_single()
140 	*val = be16_to_cpu(st->data.sample[address % 2]);  in ad7266_read_single()
157 		ret = ad7266_read_single(st, val, chan->address);  in ad7266_read_raw()
161 		if (chan->scan_type.sign == 's')  in ad7266_read_raw()
166 		scale_mv = st->vref_mv;  in ad7266_read_raw()
167 		if (st->mode == AD7266_MODE_DIFF)  in ad7266_read_raw()
169 		if (st->range == AD7266_RANGE_2VREF)  in ad7266_read_raw()
173 		*val2 = chan->scan_type.realbits;  in ad7266_read_raw()
176 		if (st->range == AD7266_RANGE_2VREF &&  in ad7266_read_raw()
177 			st->mode != AD7266_MODE_DIFF)  in ad7266_read_raw()
183 	return -EINVAL;  in ad7266_read_raw()
363 	is_differential = st->mode != AD7266_MODE_SINGLE_ENDED;  in ad7266_init_channels()
364 	is_signed = (st->range == AD7266_RANGE_2VREF) |  in ad7266_init_channels()
365 		    (st->mode == AD7266_MODE_DIFF);  in ad7266_init_channels()
367 	i = AD7266_CHAN_INFO_INDEX(is_differential, is_signed, st->fixed_addr);  in ad7266_init_channels()
370 	indio_dev->channels = chan_info->channels;  in ad7266_init_channels()
371 	indio_dev->num_channels = chan_info->num_channels;  in ad7266_init_channels()
372 	indio_dev->available_scan_masks = chan_info->scan_masks;  in ad7266_init_channels()
373 	indio_dev->masklength = chan_info->num_channels - 1;  in ad7266_init_channels()
382 	struct ad7266_platform_data *pdata = spi->dev.platform_data;  in ad7266_probe()
388 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in ad7266_probe()
390 		return -ENOMEM;  in ad7266_probe()
394 	st->reg = devm_regulator_get_optional(&spi->dev, "vref");  in ad7266_probe()
395 	if (!IS_ERR(st->reg)) {  in ad7266_probe()
396 		ret = regulator_enable(st->reg);  in ad7266_probe()
400 		ret = regulator_get_voltage(st->reg);  in ad7266_probe()
404 		st->vref_mv = ret / 1000;  in ad7266_probe()
407 		if (PTR_ERR(st->reg) != -ENODEV)  in ad7266_probe()
408 			return PTR_ERR(st->reg);  in ad7266_probe()
410 		st->vref_mv = 2500;  in ad7266_probe()
414 		st->fixed_addr = pdata->fixed_addr;  in ad7266_probe()
415 		st->mode = pdata->mode;  in ad7266_probe()
416 		st->range = pdata->range;  in ad7266_probe()
418 		if (!st->fixed_addr) {  in ad7266_probe()
419 			for (i = 0; i < ARRAY_SIZE(st->gpios); ++i) {  in ad7266_probe()
420 				st->gpios[i] = devm_gpiod_get(&spi->dev,  in ad7266_probe()
423 				if (IS_ERR(st->gpios[i])) {  in ad7266_probe()
424 					ret = PTR_ERR(st->gpios[i]);  in ad7266_probe()
430 		st->fixed_addr = true;  in ad7266_probe()
431 		st->range = AD7266_RANGE_VREF;  in ad7266_probe()
432 		st->mode = AD7266_MODE_DIFF;  in ad7266_probe()
436 	st->spi = spi;  in ad7266_probe()
438 	indio_dev->name = spi_get_device_id(spi)->name;  in ad7266_probe()
439 	indio_dev->modes = INDIO_DIRECT_MODE;  in ad7266_probe()
440 	indio_dev->info = &ad7266_info;  in ad7266_probe()
445 	st->single_xfer[0].rx_buf = &st->data.sample[0];  in ad7266_probe()
446 	st->single_xfer[0].len = 2;  in ad7266_probe()
447 	st->single_xfer[0].cs_change = 1;  in ad7266_probe()
449 	st->single_xfer[1].rx_buf = st->data.sample;  in ad7266_probe()
450 	st->single_xfer[1].len = 4;  in ad7266_probe()
451 	st->single_xfer[1].cs_change = 1;  in ad7266_probe()
453 	st->single_xfer[2].tx_buf = &st->data.sample[0];  in ad7266_probe()
454 	st->single_xfer[2].len = 1;  in ad7266_probe()
456 	spi_message_init(&st->single_msg);  in ad7266_probe()
457 	spi_message_add_tail(&st->single_xfer[0], &st->single_msg);  in ad7266_probe()
458 	spi_message_add_tail(&st->single_xfer[1], &st->single_msg);  in ad7266_probe()
459 	spi_message_add_tail(&st->single_xfer[2], &st->single_msg);  in ad7266_probe()
475 	if (!IS_ERR(st->reg))  in ad7266_probe()
476 		regulator_disable(st->reg);  in ad7266_probe()
488 	if (!IS_ERR(st->reg))  in ad7266_remove()
489 		regulator_disable(st->reg);  in ad7266_remove()
511 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");