diff options
| author | Renato Lui Geh <renatogeh@gmail.com> | 2018-11-05 17:14:58 -0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-12 19:45:58 +0100 |
| commit | 0576a43acfb446c852915657845c1a289afeeeb5 (patch) | |
| tree | ee4c3fb0a084e6e052b5cb823d4d64a9d64da637 /drivers/staging | |
| parent | d5261a9b946352da750a5cadb344d08a2d2463d1 (diff) | |
staging: iio: ad7780: update voltage on read
[ Upstream commit 336650c785b62c3bea7c8cf6061c933a90241f67 ]
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it read an outdated value set at initialization.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@gmail.com>
Acked-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/iio/adc/ad7780.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/staging/iio/adc/ad7780.c b/drivers/staging/iio/adc/ad7780.c index dec3ba6eba8a..52613f6a9dd8 100644 --- a/drivers/staging/iio/adc/ad7780.c +++ b/drivers/staging/iio/adc/ad7780.c @@ -87,12 +87,16 @@ static int ad7780_read_raw(struct iio_dev *indio_dev, long m) { struct ad7780_state *st = iio_priv(indio_dev); + int voltage_uv; switch (m) { case IIO_CHAN_INFO_RAW: return ad_sigma_delta_single_conversion(indio_dev, chan, val); case IIO_CHAN_INFO_SCALE: - *val = st->int_vref_mv * st->gain; + voltage_uv = regulator_get_voltage(st->reg); + if (voltage_uv < 0) + return voltage_uv; + *val = (voltage_uv / 1000) * st->gain; *val2 = chan->scan_type.realbits - 1; return IIO_VAL_FRACTIONAL_LOG2; case IIO_CHAN_INFO_OFFSET: |