redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

iio:ad5360: Report scale as fractional value

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

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Lars-Peter Clausen 2013-09-28 10:31:00 +01:00 committed by Jonathan Cameron
parent 25682ae5e4
commit ca3bc8b626
1 changed files with 5 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
drivers/iio/dac/ad5360.c
View file

@ -379,15 +379,14 @@ static int ad5360_read_raw(struct iio_dev *indio_dev,
*val = ret >> chan->scan_type.shift;
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
/* vout = 4 * vref * dac_code */
scale_uv = ad5360_get_channel_vref(st, chan->channel) * 4 * 100;
scale_uv = ad5360_get_channel_vref(st, chan->channel);
if (scale_uv < 0)
return scale_uv;
scale_uv >>= (chan->scan_type.realbits);
*val = scale_uv / 100000;
*val2 = (scale_uv % 100000) * 10;
return IIO_VAL_INT_PLUS_MICRO;
/* vout = 4 * vref * dac_code */
*val = scale_uv * 4 / 1000;
*val2 = chan->scan_type.realbits;
return IIO_VAL_FRACTIONAL_LOG2;
case IIO_CHAN_INFO_CALIBBIAS:
ret = ad5360_read(indio_dev, AD5360_READBACK_OFFSET,
chan->address);