From c0d014122de56d17f65048e4737d039c89aa7e8f Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Sat, 28 Sep 2013 10:31:00 +0100 Subject: [PATCH] staging:iio:ad7780: 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 --- drivers/staging/iio/adc/ad7780.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/drivers/staging/iio/adc/ad7780.c b/drivers/staging/iio/adc/ad7780.c index 4f2522a..273add3 100644 --- a/drivers/staging/iio/adc/ad7780.c +++ b/drivers/staging/iio/adc/ad7780.c @@ -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; -- 2.7.4