From: Lars-Peter Clausen Date: Sat, 28 Sep 2013 09:31:00 +0000 (+0100) Subject: iio:ad5791: Report scale as fractional value X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=213983cd32a7d983675d86ece17ac040bd39fd47;p=openwrt%2Fstaging%2Fblogic.git iio:ad5791: Report scale as fractional value Move the complexity of calculating the fixed point scale to the core. Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron --- diff --git a/drivers/iio/dac/ad5791.c b/drivers/iio/dac/ad5791.c index 3cee89be68c3..d64acbd89482 100644 --- a/drivers/iio/dac/ad5791.c +++ b/drivers/iio/dac/ad5791.c @@ -270,9 +270,9 @@ static int ad5791_read_raw(struct iio_dev *indio_dev, *val >>= chan->scan_type.shift; return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: - *val = 0; - *val2 = (((u64)st->vref_mv) * 1000000ULL) >> chan->scan_type.realbits; - return IIO_VAL_INT_PLUS_MICRO; + *val = st->vref_mv; + *val2 = (1 << chan->scan_type.realbits) - 1; + return IIO_VAL_FRACTIONAL; case IIO_CHAN_INFO_OFFSET: val64 = (((u64)st->vref_neg_mv) << chan->scan_type.realbits); do_div(val64, st->vref_mv);