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authorLars-Peter Clausen <lars@metafoo.de>2013-09-28 10:31:00 +0100
committerJonathan Cameron <jic23@kernel.org>2013-10-01 16:19:08 +0100
commitca3bc8b62634215f899cefde52a31cc6600a686c (patch)
tree4f2b71f4652888b3ddea04e01134d163ef10d9cb /drivers/iio
parent25682ae5e40f04cb86321dfc5a6713e4b45b55ea (diff)
iio:ad5360: Report scale as fractional value
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>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/dac/ad5360.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/iio/dac/ad5360.c b/drivers/iio/dac/ad5360.c
index d2da71ece740..b968af50db0a 100644
--- a/drivers/iio/dac/ad5360.c
+++ b/drivers/iio/dac/ad5360.c
@@ -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);