diff options
Diffstat (limited to 'drivers/iio/adc')
| -rw-r--r-- | drivers/iio/adc/ad7476.c | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/drivers/iio/adc/ad7476.c b/drivers/iio/adc/ad7476.c index be2098d62b8b..7f2f45a0a48d 100644 --- a/drivers/iio/adc/ad7476.c +++ b/drivers/iio/adc/ad7476.c @@ -23,9 +23,12 @@ #define RES_MASK(bits) ((1 << (bits)) - 1) +struct ad7476_state; + struct ad7476_chip_info { unsigned int int_vref_uv; struct iio_chan_spec channel[2]; + void (*reset)(struct ad7476_state *); }; struct ad7476_state { @@ -45,6 +48,7 @@ struct ad7476_state { }; enum ad7476_supported_device_ids { + ID_AD7091R, ID_AD7276, ID_AD7277, ID_AD7278, @@ -79,6 +83,12 @@ done: return IRQ_HANDLED; } +static void ad7091_reset(struct ad7476_state *st) +{ + /* Any transfers with 8 scl cycles will reset the device */ + spi_read(st->spi, st->data, 1); +} + static int ad7476_scan_direct(struct ad7476_state *st) { int ret; @@ -130,11 +140,11 @@ static int ad7476_read_raw(struct iio_dev *indio_dev, return -EINVAL; } -#define _AD7476_CHAN(bits, _shift) \ +#define _AD7476_CHAN(bits, _shift, _info_mask) \ { \ .type = IIO_VOLTAGE, \ .indexed = 1, \ - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + .info_mask = _info_mask | \ IIO_CHAN_INFO_SCALE_SHARED_BIT, \ .scan_type = { \ .sign = 'u', \ @@ -145,10 +155,18 @@ static int ad7476_read_raw(struct iio_dev *indio_dev, }, \ } -#define AD7476_CHAN(bits) _AD7476_CHAN((bits), 13 - (bits)) -#define AD7940_CHAN(bits) _AD7476_CHAN((bits), 15 - (bits)) +#define AD7476_CHAN(bits) _AD7476_CHAN((bits), 13 - (bits), \ + IIO_CHAN_INFO_RAW_SEPARATE_BIT) +#define AD7940_CHAN(bits) _AD7476_CHAN((bits), 15 - (bits), \ + IIO_CHAN_INFO_RAW_SEPARATE_BIT) +#define AD7091R_CHAN(bits) _AD7476_CHAN((bits), 16 - (bits), 0) static const struct ad7476_chip_info ad7476_chip_info_tbl[] = { + [ID_AD7091R] = { + .channel[0] = AD7091R_CHAN(12), + .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), + .reset = ad7091_reset, + }, [ID_AD7276] = { .channel[0] = AD7940_CHAN(12), .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), @@ -238,6 +256,9 @@ static int __devinit ad7476_probe(struct spi_device *spi) if (ret) goto error_disable_reg; + if (st->chip_info->reset) + st->chip_info->reset(st); + ret = iio_device_register(indio_dev); if (ret) goto error_ring_unregister; @@ -271,6 +292,7 @@ static int __devexit ad7476_remove(struct spi_device *spi) } static const struct spi_device_id ad7476_id[] = { + {"ad7091r", ID_AD7091R}, {"ad7273", ID_AD7277}, {"ad7274", ID_AD7276}, {"ad7276", ID_AD7276}, |