From a8e1f0ba138e0c7c51cdf268b2edef758581a31e Mon Sep 17 00:00:00 2001 From: "H. Nikolaus Schaller" Date: Tue, 8 Mar 2022 13:53:03 +0100 Subject: [PATCH] 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 Link: https://lore.kernel.org/r/1cee45bfc3fa2ab59dcc17242fb52468035360a1.1646743982.git.hns@goldelico.com Signed-off-by: Jonathan Cameron --- drivers/iio/adc/palmas_gpadc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/iio/adc/palmas_gpadc.c b/drivers/iio/adc/palmas_gpadc.c index 61e80bf..fd00034 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; } -- 2.7.4