Messages in this thread Patch in this message | | | Date | Mon, 5 Nov 2018 17:14:58 -0200 | From | Renato Lui Geh <> | Subject | [PATCH v4 1/2] staging: iio: ad7780: update voltage on read |
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The ad7780 driver previously did not read the correct device output, as it read an outdated value set at initialization.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> --- Changes in v3: - removed initialization (int voltage_uv = 0) - returns error when voltage_uv is null Changes in v4: - returns error when voltage_uv is negative
drivers/staging/iio/adc/ad7780.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/iio/adc/ad7780.c b/drivers/staging/iio/adc/ad7780.c index b67412db0318..c7cb05cedbbc 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: -- 2.19.1
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