iio: adc: stm32-adc: improve calibration error log

Add more information in calibration error log to differentiate
single-ended and differential calibration.

Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com>
Reviewed-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Link: https://lore.kernel.org/r/20221115103124.70074-3-olivier.moysan@foss.st.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/stm32-adc.c b/drivers/iio/adc/stm32-adc.c
index 2b2b55eb130ed18c18f412dcfc0c6281b8a2d95b..65dd455375050de6bd948c8ef05be003bb1b7ea2 100644 (file)
--- a/drivers/iio/adc/stm32-adc.c
+++ b/drivers/iio/adc/stm32-adc.c
@@ -1109,7 +1109,7 @@ static int stm32h7_adc_selfcalib(struct iio_dev *indio_dev, int do_lincal)
                                           !(val & STM32H7_ADCAL), 100,
                                           STM32H7_ADC_CALIB_TIMEOUT_US);
        if (ret) {
-               dev_err(&indio_dev->dev, "calibration failed\n");
+               dev_err(&indio_dev->dev, "calibration (single-ended) error %d\n", ret);
                goto out;
        }
 
@@ -1125,7 +1125,8 @@ static int stm32h7_adc_selfcalib(struct iio_dev *indio_dev, int do_lincal)
                                           !(val & STM32H7_ADCAL), 100,
                                           STM32H7_ADC_CALIB_TIMEOUT_US);
        if (ret) {
-               dev_err(&indio_dev->dev, "calibration failed\n");
+               dev_err(&indio_dev->dev, "calibration (diff%s) error %d\n",
+                       (msk & STM32H7_ADCALLIN) ? "+linear" : "", ret);
                goto out;
        }