Commit a8e1f0ba authored by H. Nikolaus Schaller's avatar H. Nikolaus Schaller Committed by Jonathan Cameron
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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: default avatarH. Nikolaus Schaller <hns@goldelico.com>
Link: https://lore.kernel.org/r/1cee45bfc3fa2ab59dcc17242fb52468035360a1.1646743982.git.hns@goldelico.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 44b0be6e

drivers/iio/adc/palmas_gpadc.c

+2 −1
Original line number Diff line number Diff line
@@ -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;

	}