staging:iio:ad7887: Use passed in chan spec in ad7887_read_raw

Use the passed in chan spec in ad7887_read_raw instead of alawys using the first
chan spec entry from the chip info data. Since all channels have the same shift
and realbits from a functional point of view it does not matter which chan spec
is used, but the patch makes the a bit more clear.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/drivers/staging/iio/adc/ad7887.c b/drivers/staging/iio/adc/ad7887.c
index 3ac0c30..72cfe19 100644 (file)
--- a/drivers/staging/iio/adc/ad7887.c
+++ b/drivers/staging/iio/adc/ad7887.c
@@ -177,8 +177,8 @@ static int ad7887_read_raw(struct iio_dev *indio_dev,
 
                if (ret < 0)
                        return ret;
-               *val = (ret >> st->chip_info->channel[0].scan_type.shift) &
-                       RES_MASK(st->chip_info->channel[0].scan_type.realbits);
+               *val = ret >> chan->scan_type.shift;
+               *val &= RES_MASK(chan->scan_type.realbits);
                return IIO_VAL_INT;
        case IIO_CHAN_INFO_SCALE:
                if (st->reg) {
@@ -190,7 +190,7 @@ static int ad7887_read_raw(struct iio_dev *indio_dev,
                        *val = st->chip_info->int_vref_mv;
                }
 
-               *val2 = st->chip_info->channel[0].scan_type.realbits;
+               *val2 = chan->scan_type.realbits;
 
                return IIO_VAL_FRACTIONAL_LOG2;
        }