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Subject[PATCH 2/4] iio: adc: ad7476: Add IIO_CHAN_INFO_RAW for AD7091R
Date
From: Dragos Bogdan <dragos.bogdan@analog.com>

When CONVST signal is generated internally, IIO_CHAN_INFO_RAW can be
made available for AD7091R for single reads. This patch enables it and
makes supporting more devices by this driver easier.

Signed-off-by: Dragos Bogdan <dragos.bogdan@analog.com>
Signed-off-by: Beniamin Bia <beniamin.bia@analog.com>
---
drivers/iio/adc/ad7476.c | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/drivers/iio/adc/ad7476.c b/drivers/iio/adc/ad7476.c
index 32e857dfec9c..3b48073dd62d 100644
--- a/drivers/iio/adc/ad7476.c
+++ b/drivers/iio/adc/ad7476.c
@@ -29,6 +29,8 @@ struct ad7476_state;
struct ad7476_chip_info {
unsigned int int_vref_uv;
struct iio_chan_spec channel[2];
+ /* channels used when convst gpio is defined */
+ struct iio_chan_spec convst_channel[2];
void (*reset)(struct ad7476_state *);
};

@@ -109,6 +111,8 @@ static int ad7476_scan_direct(struct ad7476_state *st)
{
int ret;

+ ad7091_convst(st);
+
ret = spi_sync(st->spi, &st->msg);
if (ret)
return ret;
@@ -176,6 +180,8 @@ static int ad7476_read_raw(struct iio_dev *indio_dev,
#define AD7940_CHAN(bits) _AD7476_CHAN((bits), 15 - (bits), \
BIT(IIO_CHAN_INFO_RAW))
#define AD7091R_CHAN(bits) _AD7476_CHAN((bits), 16 - (bits), 0)
+#define AD7091R_CONVST_CHAN(bits) _AD7476_CHAN((bits), 16 - (bits), \
+ BIT(IIO_CHAN_INFO_RAW))
#define ADS786X_CHAN(bits) _AD7476_CHAN((bits), 12 - (bits), \
BIT(IIO_CHAN_INFO_RAW))

@@ -183,6 +189,8 @@ static const struct ad7476_chip_info ad7476_chip_info_tbl[] = {
[ID_AD7091R] = {
.channel[0] = AD7091R_CHAN(12),
.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+ .convst_channel[0] = AD7091R_CONVST_CHAN(12),
+ .convst_channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
.reset = ad7091_reset,
},
[ID_AD7276] = {
@@ -288,6 +296,9 @@ static int ad7476_probe(struct spi_device *spi)
indio_dev->channels = st->chip_info->channel;
indio_dev->num_channels = 2;
indio_dev->info = &ad7476_info;
+
+ if (st->convst_gpio && st->chip_info->convst_channel)
+ indio_dev->channels = st->chip_info->convst_channel;
/* Setup default message */

st->xfer.rx_buf = &st->data;
--
2.17.1
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