drivers: adc: esp32: delete previous calibration curve

In case channel_setup is called with a new attenuation
config, make sure previous calibration scheme is deleted properly.

Signed-off-by: Sylvio Alves <[email protected]>

Author: sylvioalves

drivers/adc/adc_esp32.c

@@ -535,6 +535,11 @@ static int adc_esp32_channel_setup(const struct device *dev, const struct adc_ch
 			conf->unit, cfg->channel_id, data->attenuation[cfg->channel_id],
 			data->resolution[cfg->channel_id]);
 
+		if (data->cal_handle[cfg->channel_id] != NULL) {
+			/* delete pre-existing calib scheme */
+			adc_cali_delete_scheme_curve_fitting(data->cal_handle[cfg->channel_id]);
+		}
+
 		adc_cali_create_scheme_curve_fitting(&cal_config,
 						     &data->cal_handle[cfg->channel_id]);
 #endif /* ADC_CALI_SCHEME_CURVE_FITTING_SUPPORTED */
@@ -553,6 +558,11 @@ static int adc_esp32_channel_setup(const struct device *dev, const struct adc_ch
 			conf->unit, cfg->channel_id, data->attenuation[cfg->channel_id],
 			data->resolution[cfg->channel_id]);
 
+		if (data->cal_handle[cfg->channel_id] != NULL) {
+			/* delete pre-existing calib scheme */
+			adc_cali_delete_scheme_curve_fitting(data->cal_handle[cfg->channel_id]);
+		}
+
 		adc_cali_create_scheme_line_fitting(&cal_config,
 						    &data->cal_handle[cfg->channel_id]);
 #endif /* ADC_CALI_SCHEME_LINE_FITTING_SUPPORTED */