staging:iio:dac:ad5791: Use correct DAC bit-size

Commit c5b99396 ("staging:iio:dac:ad5791 chan spec conversion.") introduced a
small bug, using storagebits instead of realbits throughout the driver, which
causes the driver to work incorrectly. This patch fixes it.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/staging/iio/dac/ad5791.c b/drivers/staging/iio/dac/ad5791.c
index fbf446d5671..9a76c4311f9 100644
--- a/drivers/staging/iio/dac/ad5791.c
+++ b/drivers/staging/iio/dac/ad5791.c
@@ -234,11 +234,11 @@ static int ad5791_read_raw(struct iio_dev *indio_dev,
                         return ret;
                 *val &= AD5791_DAC_MASK;
                 *val >>= chan->scan_type.shift;
-                *val -= (1 << (chan->scan_type.storagebits - 1));
+                *val -= (1 << (chan->scan_type.realbits - 1));
                 return IIO_VAL_INT;
         case (1 << IIO_CHAN_INFO_SCALE_SHARED):
                 *val = 0;
-                *val2 = (st->vref_mv * 1000) >> chan->scan_type.storagebits;
+                *val2 = (st->vref_mv * 1000) >> chan->scan_type.realbits;
                 return IIO_VAL_INT_PLUS_MICRO;
         default:
                 return -EINVAL;
@@ -257,8 +257,8 @@ static int ad5791_write_raw(struct iio_dev *indio_dev,
 
         switch (mask) {
         case 0:
-                val += (1 << (chan->scan_type.storagebits - 1));
-                val &= AD5791_RES_MASK(chan->scan_type.storagebits);
+                val += (1 << (chan->scan_type.realbits - 1));
+                val &= AD5791_RES_MASK(chan->scan_type.realbits);
                 val <<= chan->scan_type.shift;
 
                 return ad5791_spi_write(st->spi, chan->address, val);