diff options
| author | Renato Lui Geh <renatogeh@gmail.com> | 2018-11-05 17:14:58 -0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-20 10:13:05 +0100 |
| commit | eba6d94b54e74064ca7c57fe7242726f2fa8e9f1 (patch) | |
| tree | da60b941e7f2c8b209d62450f49cb86c6b420b51 | |
| parent | 524b2be52946ce90b1716a2fd6b298182e325dc9 (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it read an outdated value set at initialization.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>
| -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 3abc7789237f..531338ea5eb4 100644 --- a/drivers/staging/iio/adc/ad7780.c +++ b/drivers/staging/iio/adc/ad7780.c @@ -90,12 +90,16 @@ 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: |