From 3a6af93dd66eba90cee3eb778b83bdccb2202d4f Mon Sep 17 00:00:00 2001 From: Dragos Bogdan Date: Wed, 11 Mar 2020 10:43:26 +0200 Subject: [PATCH] iio: adc: ad7476: Add IIO_CHAN_INFO_RAW for AD7091R 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 Signed-off-by: Beniamin Bia Signed-off-by: Jonathan Cameron --- 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 32e857df..3b48073 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; -- 2.7.4