Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 5ca33f79 authored by Renato Lui Geh's avatar Renato Lui Geh Committed by Greg Kroah-Hartman
Browse files

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it read an outdated value set at initialization.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: default avatarRenato Lui Geh <renatogeh@gmail.com>
Acked-by: default avatarAlexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 39561eee

drivers/staging/iio/adc/ad7780.c

+5 −1
Original line number Diff line number Diff line
@@ -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: