diff options
| author | H. Nikolaus Schaller <hns@goldelico.com> | 2022-03-08 13:53:03 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-04-04 09:11:25 +0100 |
| commit | a8e1f0ba138e0c7c51cdf268b2edef758581a31e (patch) | |
| tree | 1b5c9bd8f8c26e19e4cd61a19de2faa7f52fd808 /drivers/iio/adc | |
| parent | 44b0be6eb3736501f11f9c630910169c35431f6e (diff) | |
| download | lwn-a8e1f0ba138e0c7c51cdf268b2edef758581a31e.tar.gz lwn-a8e1f0ba138e0c7c51cdf268b2edef758581a31e.zip | |
iio: palmas: shut up warning about calibration mismatch (due to noise)
Although technically checking for ADC values below 0 is correct,
because they are outside of the calibration values, there is usually
noise which spuriously fills the console log with error messages if
calculated input voltage gets close to 0V.
Ignore small negative calculated values, but clamp them to 0.
Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Link: https://lore.kernel.org/r/1cee45bfc3fa2ab59dcc17242fb52468035360a1.1646743982.git.hns@goldelico.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/adc')
| -rw-r--r-- | drivers/iio/adc/palmas_gpadc.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/iio/adc/palmas_gpadc.c b/drivers/iio/adc/palmas_gpadc.c index 61e80bf3d05e..fd000345ec5c 100644 --- a/drivers/iio/adc/palmas_gpadc.c +++ b/drivers/iio/adc/palmas_gpadc.c @@ -376,7 +376,8 @@ static int palmas_gpadc_get_calibrated_code(struct palmas_gpadc *adc, adc->adc_info[adc_chan].gain_error; if (val < 0) { - dev_err(adc->dev, "Mismatch with calibration\n"); + if (val < -10) + dev_err(adc->dev, "Mismatch with calibration var = %d\n", val); return 0; } |