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Commit c0d01412 authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Jonathan Cameron
Browse files

staging:iio:ad7780: Report scale as fractional value 



Move the complexity of calculating the fixed point scale to the core.

Signed-off-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 9324131b

drivers/staging/iio/adc/ad7780.c

+3 −6
Original line number Diff line number Diff line
@@ -90,17 +90,14 @@ static int ad7780_read_raw(struct iio_dev *indio_dev, 
			   long m)

{

	struct ad7780_state *st = iio_priv(indio_dev);

	unsigned long scale_uv;



	switch (m) {

	case IIO_CHAN_INFO_RAW:

		return ad_sigma_delta_single_conversion(indio_dev, chan, val);

	case IIO_CHAN_INFO_SCALE:

		scale_uv = (st->int_vref_mv * 100000 * st->gain)

			>> (chan->scan_type.realbits - 1);

		*val =  scale_uv / 100000;

		*val2 = (scale_uv % 100000) * 10;

		return IIO_VAL_INT_PLUS_MICRO;

		*val = st->int_vref_mv * st->gain;

		*val2 = chan->scan_type.realbits - 1;

		return IIO_VAL_FRACTIONAL_LOG2;

	case IIO_CHAN_INFO_OFFSET:

		*val -= (1 << (chan->scan_type.realbits - 1));

		return IIO_VAL_INT;