30 #define AD7887_CH_AIN1		BIT(3)	/* convert on channel 1, DUAL=1 */
31 #define AD7887_CH_AIN0		0	/* convert on channel 0, DUAL=0,1 */
33 #define AD7887_PM_MODE2		1	/* full on */
83 	struct ad7887_state *st = iio_priv(indio_dev);  in ad7887_ring_preenable()  local
87 	case (1 << 0):  in ad7887_ring_preenable()
88 		st->ring_msg = &st->msg[AD7887_CH0];  in ad7887_ring_preenable()
90 	case (1 << 1):  in ad7887_ring_preenable()
91 		st->ring_msg = &st->msg[AD7887_CH1];  in ad7887_ring_preenable()
93 		spi_sync(st->spi, st->ring_msg);  in ad7887_ring_preenable()
95 	case ((1 << 1) | (1 << 0)):  in ad7887_ring_preenable()
96 		st->ring_msg = &st->msg[AD7887_CH0_CH1];  in ad7887_ring_preenable()
105 	struct ad7887_state *st = iio_priv(indio_dev);  in ad7887_ring_postdisable()  local
108 	return spi_sync(st->spi, &st->msg[AD7887_CH0]);  in ad7887_ring_postdisable()
115 	struct ad7887_state *st = iio_priv(indio_dev);  in ad7887_trigger_handler()  local
118 	b_sent = spi_sync(st->spi, st->ring_msg);  in ad7887_trigger_handler()
122 	iio_push_to_buffers_with_timestamp(indio_dev, st->data,  in ad7887_trigger_handler()
135 static int ad7887_scan_direct(struct ad7887_state *st, unsigned ch)  in ad7887_scan_direct()  argument
137 	int ret = spi_sync(st->spi, &st->msg[ch]);  in ad7887_scan_direct()
141 	return (st->data[(ch * 2)] << 8) | st->data[(ch * 2) + 1];  in ad7887_scan_direct()
151 	struct ad7887_state *st = iio_priv(indio_dev);  in ad7887_read_raw()  local
158 		ret = ad7887_scan_direct(st, chan->address);  in ad7887_read_raw()
164 		*val &= GENMASK(chan->scan_type.realbits - 1, 0);  in ad7887_read_raw()
167 		if (st->reg) {  in ad7887_read_raw()
168 			*val = regulator_get_voltage(st->reg);  in ad7887_read_raw()
173 			*val = st->chip_info->int_vref_mv;  in ad7887_read_raw()
185 	.indexed = 1, \
202 	IIO_CHAN_SOFT_TIMESTAMP(1),
207 	AD7887_CHANNEL(1),
238 	struct ad7887_state *st;  in ad7887_probe()  local
243 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in ad7887_probe()
247 	st = iio_priv(indio_dev);  in ad7887_probe()
249 	st->reg = devm_regulator_get_optional(&spi->dev, "vref");  in ad7887_probe()
250 	if (IS_ERR(st->reg)) {  in ad7887_probe()
251 		if (PTR_ERR(st->reg) != -ENODEV)  in ad7887_probe()
252 			return PTR_ERR(st->reg);  in ad7887_probe()
254 		st->reg = NULL;  in ad7887_probe()
257 	if (st->reg) {  in ad7887_probe()
258 		ret = regulator_enable(st->reg);  in ad7887_probe()
262 		ret = devm_add_action_or_reset(&spi->dev, ad7887_reg_disable, st->reg);  in ad7887_probe()
267 	st->chip_info =  in ad7887_probe()
270 	st->spi = spi;  in ad7887_probe()
279 	if (!st->reg)  in ad7887_probe()
284 	st->tx_cmd_buf[0] = AD7887_CH_AIN0 | mode;  in ad7887_probe()
286 	st->xfer[0].rx_buf = &st->data[0];  in ad7887_probe()
287 	st->xfer[0].tx_buf = &st->tx_cmd_buf[0];  in ad7887_probe()
288 	st->xfer[0].len = 2;  in ad7887_probe()
290 	spi_message_init(&st->msg[AD7887_CH0]);  in ad7887_probe()
291 	spi_message_add_tail(&st->xfer[0], &st->msg[AD7887_CH0]);  in ad7887_probe()
294 		st->tx_cmd_buf[2] = AD7887_CH_AIN1 | mode;  in ad7887_probe()
296 		st->xfer[1].rx_buf = &st->data[0];  in ad7887_probe()
297 		st->xfer[1].tx_buf = &st->tx_cmd_buf[2];  in ad7887_probe()
298 		st->xfer[1].len = 2;  in ad7887_probe()
300 		st->xfer[2].rx_buf = &st->data[2];  in ad7887_probe()
301 		st->xfer[2].tx_buf = &st->tx_cmd_buf[0];  in ad7887_probe()
302 		st->xfer[2].len = 2;  in ad7887_probe()
304 		spi_message_init(&st->msg[AD7887_CH0_CH1]);  in ad7887_probe()
305 		spi_message_add_tail(&st->xfer[1], &st->msg[AD7887_CH0_CH1]);  in ad7887_probe()
306 		spi_message_add_tail(&st->xfer[2], &st->msg[AD7887_CH0_CH1]);  in ad7887_probe()
308 		st->xfer[3].rx_buf = &st->data[2];  in ad7887_probe()
309 		st->xfer[3].tx_buf = &st->tx_cmd_buf[2];  in ad7887_probe()
310 		st->xfer[3].len = 2;  in ad7887_probe()
312 		spi_message_init(&st->msg[AD7887_CH1]);  in ad7887_probe()
313 		spi_message_add_tail(&st->xfer[3], &st->msg[AD7887_CH1]);  in ad7887_probe()
315 		indio_dev->channels = st->chip_info->dual_channels;  in ad7887_probe()
316 		indio_dev->num_channels = st->chip_info->num_dual_channels;  in ad7887_probe()
318 		indio_dev->channels = st->chip_info->channels;  in ad7887_probe()
319 		indio_dev->num_channels = st->chip_info->num_channels;  in ad7887_probe()