staging: iio: ad7780: fix offset read value

Variable val subtracted an uninitialized value on IIO_CHAN_INFO_OFFSET.
This was fixed by assigning the correct value instead.

Signed-off-by: Renato Lui Geh <renatogeh@gmail.com>
Acked-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/staging/iio/adc/ad7780.c b/drivers/staging/iio/adc/ad7780.c
index b67412d..91e016d 100644 (file)
--- a/drivers/staging/iio/adc/ad7780.c
+++ b/drivers/staging/iio/adc/ad7780.c
@@ -96,7 +96,7 @@ static int ad7780_read_raw(struct iio_dev *indio_dev,
                *val2 = chan->scan_type.realbits - 1;
                return IIO_VAL_FRACTIONAL_LOG2;
        case IIO_CHAN_INFO_OFFSET:
-               *val -= (1 << (chan->scan_type.realbits - 1));
+               *val = -(1 << (chan->scan_type.realbits - 1));
                return IIO_VAL_INT;
        }