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Commit ca3bc8b6 authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Jonathan Cameron
Browse files

iio:ad5360: 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 25682ae5

drivers/iio/dac/ad5360.c

+5 −6
Original line number Original line Diff line number Diff line
@@ -379,15 +379,14 @@ static int ad5360_read_raw(struct iio_dev *indio_dev, 
		*val = ret >> chan->scan_type.shift;

		*val = ret >> chan->scan_type.shift;

		return IIO_VAL_INT;

		return IIO_VAL_INT;

	case IIO_CHAN_INFO_SCALE:

	case IIO_CHAN_INFO_SCALE:

		/* vout = 4 * vref * dac_code */

		scale_uv = ad5360_get_channel_vref(st, chan->channel);

		scale_uv = ad5360_get_channel_vref(st, chan->channel) * 4 * 100;

		if (scale_uv < 0)

		if (scale_uv < 0)

			return scale_uv;

			return scale_uv;





		scale_uv >>= (chan->scan_type.realbits);

		/* vout = 4 * vref * dac_code */

		*val =  scale_uv / 100000;

		*val = scale_uv * 4 / 1000;

		*val2 = (scale_uv % 100000) * 10;

		*val2 = chan->scan_type.realbits;

		return IIO_VAL_INT_PLUS_MICRO;

		return IIO_VAL_FRACTIONAL_LOG2;

	case IIO_CHAN_INFO_CALIBBIAS:

	case IIO_CHAN_INFO_CALIBBIAS:

		ret = ad5360_read(indio_dev, AD5360_READBACK_OFFSET,

		ret = ad5360_read(indio_dev, AD5360_READBACK_OFFSET,

			chan->address);

			chan->address);