From eba6d94b54e74064ca7c57fe7242726f2fa8e9f1 Mon Sep 17 00:00:00 2001 From: Renato Lui Geh Date: Mon, 5 Nov 2018 17:14:58 -0200 Subject: 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] The ad7780 driver previously did not read the correct device output, as it read an outdated value set at initialization.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 Acked-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin --- drivers/staging/iio/adc/ad7780.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'drivers/staging/iio/adc/ad7780.c') 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: -- cgit v1.2.3