Commit ae76751f authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Jonathan Cameron

iio:ad5755: 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 ecc7e948
...@@ -253,15 +253,6 @@ static inline int ad5755_get_offset(struct ad5755_state *st, ...@@ -253,15 +253,6 @@ static inline int ad5755_get_offset(struct ad5755_state *st,
return (min * (1 << chan->scan_type.realbits)) / (max - min); return (min * (1 << chan->scan_type.realbits)) / (max - min);
} }
static inline int ad5755_get_scale(struct ad5755_state *st,
struct iio_chan_spec const *chan)
{
int min, max;
ad5755_get_min_max(st, chan, &min, &max);
return ((max - min) * 1000000000ULL) >> chan->scan_type.realbits;
}
static int ad5755_chan_reg_info(struct ad5755_state *st, static int ad5755_chan_reg_info(struct ad5755_state *st,
struct iio_chan_spec const *chan, long info, bool write, struct iio_chan_spec const *chan, long info, bool write,
unsigned int *reg, unsigned int *shift, unsigned int *offset) unsigned int *reg, unsigned int *shift, unsigned int *offset)
...@@ -303,13 +294,15 @@ static int ad5755_read_raw(struct iio_dev *indio_dev, ...@@ -303,13 +294,15 @@ static int ad5755_read_raw(struct iio_dev *indio_dev,
{ {
struct ad5755_state *st = iio_priv(indio_dev); struct ad5755_state *st = iio_priv(indio_dev);
unsigned int reg, shift, offset; unsigned int reg, shift, offset;
int min, max;
int ret; int ret;
switch (info) { switch (info) {
case IIO_CHAN_INFO_SCALE: case IIO_CHAN_INFO_SCALE:
*val = 0; ad5755_get_min_max(st, chan, &min, &max);
*val2 = ad5755_get_scale(st, chan); *val = max - min;
return IIO_VAL_INT_PLUS_NANO; *val2 = chan->scan_type.realbits;
return IIO_VAL_FRACTIONAL_LOG2;
case IIO_CHAN_INFO_OFFSET: case IIO_CHAN_INFO_OFFSET:
*val = ad5755_get_offset(st, chan); *val = ad5755_get_offset(st, chan);
return IIO_VAL_INT; return IIO_VAL_INT;
......
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