The ad7780 driver previously did not read the correct device output, as
it read an outdated value set at initialization. It now updates its
voltage on read.
Signed-off-by: Renato Lui Geh <renatogeh@xxxxxxxxx>
---
drivers/staging/iio/adc/ad7780.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/staging/iio/adc/ad7780.c b/drivers/staging/iio/adc/ad7780.c
index b67412db0318..27972563bb6a 100644
--- a/drivers/staging/iio/adc/ad7780.c
+++ b/drivers/staging/iio/adc/ad7780.c
@@ -87,11 +87,15 @@ static int ad7780_read_raw(struct iio_dev *indio_dev,
long m)
{
struct ad7780_state *st = iio_priv(indio_dev);
+ int voltage_uv = 0;
switch (m) {
case IIO_CHAN_INFO_RAW:
return ad_sigma_delta_single_conversion(indio_dev, chan, val);
case IIO_CHAN_INFO_SCALE:
+ voltage_uv = regulator_get_voltage(st->reg);
+ if (voltage_uv)
+ st->int_vref_mv = voltage_uv/1000;
*val = st->int_vref_mv * st->gain;
*val2 = chan->scan_type.realbits - 1;
return IIO_VAL_FRACTIONAL_LOG2;
--
2.19.1
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