6  * Licensed under the GPL-2.
35 	enum ad7266_range	range;  member
38 	struct gpio		gpios[3];  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()
86 	struct iio_dev *indio_dev = pf->indio_dev;  in ad7266_trigger_handler()
90 	ret = spi_read(st->spi, st->data.sample, 4);  in ad7266_trigger_handler()
92 		iio_push_to_buffers_with_timestamp(indio_dev, &st->data,  in ad7266_trigger_handler()
93 			    pf->timestamp);  in ad7266_trigger_handler()
96 	iio_trigger_notify_done(indio_dev->trig);  in ad7266_trigger_handler()
105 	if (st->fixed_addr)  in ad7266_select_input()
108 	switch (st->mode) {  in ad7266_select_input()
121 		gpio_set_value(st->gpios[i].gpio, (bool)(nr & BIT(i)));  in ad7266_select_input()
128 	unsigned int nr = find_first_bit(scan_mask, indio_dev->masklength);  in ad7266_update_scan_mode()
142 	ret = spi_sync(st->spi, &st->single_msg);  in ad7266_read_single()
143 	*val = be16_to_cpu(st->data.sample[address % 2]);  in ad7266_read_single()
160 		ret = ad7266_read_single(st, val, chan->address);  in ad7266_read_raw()
164 		if (chan->scan_type.sign == 's')  in ad7266_read_raw()
169 		scale_mv = st->vref_mv;  in ad7266_read_raw()
170 		if (st->mode == AD7266_MODE_DIFF)  in ad7266_read_raw()
172 		if (st->range == AD7266_RANGE_2VREF)  in ad7266_read_raw()
176 		*val2 = chan->scan_type.realbits;  in ad7266_read_raw()
179 		if (st->range == AD7266_RANGE_2VREF &&  in ad7266_read_raw()
180 			st->mode != AD7266_MODE_DIFF)  in ad7266_read_raw()
186 	return -EINVAL;  in ad7266_read_raw()
366 	is_differential = st->mode != AD7266_MODE_SINGLE_ENDED;  in ad7266_init_channels()
367 	is_signed = (st->range == AD7266_RANGE_2VREF) |  in ad7266_init_channels()
368 		    (st->mode == AD7266_MODE_DIFF);  in ad7266_init_channels()
370 	i = AD7266_CHAN_INFO_INDEX(is_differential, is_signed, st->fixed_addr);  in ad7266_init_channels()
373 	indio_dev->channels = chan_info->channels;  in ad7266_init_channels()
374 	indio_dev->num_channels = chan_info->num_channels;  in ad7266_init_channels()
375 	indio_dev->available_scan_masks = chan_info->scan_masks;  in ad7266_init_channels()
376 	indio_dev->masklength = chan_info->num_channels - 1;  in ad7266_init_channels()
385 	struct ad7266_platform_data *pdata = spi->dev.platform_data;  in ad7266_probe()
391 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in ad7266_probe()
393 		return -ENOMEM;  in ad7266_probe()
397 	st->reg = devm_regulator_get_optional(&spi->dev, "vref");  in ad7266_probe()
398 	if (!IS_ERR(st->reg)) {  in ad7266_probe()
399 		ret = regulator_enable(st->reg);  in ad7266_probe()
403 		ret = regulator_get_voltage(st->reg);  in ad7266_probe()
407 		st->vref_mv = ret / 1000;  in ad7266_probe()
410 		if (PTR_ERR(st->reg) != -ENODEV)  in ad7266_probe()
411 			return PTR_ERR(st->reg);  in ad7266_probe()
413 		st->vref_mv = 2500;  in ad7266_probe()
417 		st->fixed_addr = pdata->fixed_addr;  in ad7266_probe()
418 		st->mode = pdata->mode;  in ad7266_probe()
419 		st->range = pdata->range;  in ad7266_probe()
421 		if (!st->fixed_addr) {  in ad7266_probe()
422 			for (i = 0; i < ARRAY_SIZE(st->gpios); ++i) {  in ad7266_probe()
423 				st->gpios[i].gpio = pdata->addr_gpios[i];  in ad7266_probe()
424 				st->gpios[i].flags = GPIOF_OUT_INIT_LOW;  in ad7266_probe()
425 				st->gpios[i].label = ad7266_gpio_labels[i];  in ad7266_probe()
427 			ret = gpio_request_array(st->gpios,  in ad7266_probe()
428 				ARRAY_SIZE(st->gpios));  in ad7266_probe()
433 		st->fixed_addr = true;  in ad7266_probe()
434 		st->range = AD7266_RANGE_VREF;  in ad7266_probe()
435 		st->mode = AD7266_MODE_DIFF;  in ad7266_probe()
439 	st->spi = spi;  in ad7266_probe()
441 	indio_dev->dev.parent = &spi->dev;  in ad7266_probe()
442 	indio_dev->dev.of_node = spi->dev.of_node;  in ad7266_probe()
443 	indio_dev->name = spi_get_device_id(spi)->name;  in ad7266_probe()
444 	indio_dev->modes = INDIO_DIRECT_MODE;  in ad7266_probe()
445 	indio_dev->info = &ad7266_info;  in ad7266_probe()
450 	st->single_xfer[0].rx_buf = &st->data.sample[0];  in ad7266_probe()
451 	st->single_xfer[0].len = 2;  in ad7266_probe()
452 	st->single_xfer[0].cs_change = 1;  in ad7266_probe()
454 	st->single_xfer[1].rx_buf = st->data.sample;  in ad7266_probe()
455 	st->single_xfer[1].len = 4;  in ad7266_probe()
456 	st->single_xfer[1].cs_change = 1;  in ad7266_probe()
458 	st->single_xfer[2].tx_buf = &st->data.sample[0];  in ad7266_probe()
459 	st->single_xfer[2].len = 1;  in ad7266_probe()
461 	spi_message_init(&st->single_msg);  in ad7266_probe()
462 	spi_message_add_tail(&st->single_xfer[0], &st->single_msg);  in ad7266_probe()
463 	spi_message_add_tail(&st->single_xfer[1], &st->single_msg);  in ad7266_probe()
464 	spi_message_add_tail(&st->single_xfer[2], &st->single_msg);  in ad7266_probe()
480 	if (!st->fixed_addr)  in ad7266_probe()
481 		gpio_free_array(st->gpios, ARRAY_SIZE(st->gpios));  in ad7266_probe()
483 	if (!IS_ERR(st->reg))  in ad7266_probe()
484 		regulator_disable(st->reg);  in ad7266_probe()
496 	if (!st->fixed_addr)  in ad7266_remove()
497 		gpio_free_array(st->gpios, ARRAY_SIZE(st->gpios));  in ad7266_remove()
498 	if (!IS_ERR(st->reg))  in ad7266_remove()
499 		regulator_disable(st->reg);  in ad7266_remove()
521 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");