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Commit d6570b33 authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Jonathan Cameron
Browse files

staging:iio:ad7280a: 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 b2171677

drivers/staging/iio/adc/ad7280a.c

+4 −6
Original line number Diff line number Diff line
@@ -783,7 +783,6 @@ static int ad7280_read_raw(struct iio_dev *indio_dev, 
			   long m)

{

	struct ad7280_state *st = iio_priv(indio_dev);

	unsigned int scale_uv;

	int ret;



	switch (m) {
@@ -804,13 +803,12 @@ static int ad7280_read_raw(struct iio_dev *indio_dev, 
		return IIO_VAL_INT;

	case IIO_CHAN_INFO_SCALE:

		if ((chan->address & 0xFF) <= AD7280A_CELL_VOLTAGE_6)

			scale_uv = (4000 * 1000) >> AD7280A_BITS;

			*val = 4000;

		else

			scale_uv = (5000 * 1000) >> AD7280A_BITS;

			*val = 5000;



		*val =  scale_uv / 1000;

		*val2 = (scale_uv % 1000) * 1000;

		return IIO_VAL_INT_PLUS_MICRO;

		*val2 = AD7280A_BITS;

		return IIO_VAL_FRACTIONAL_LOG2;

	}

	return -EINVAL;

}