adc: Adjust the adc resolution with the oversampling factor

Robibobo1 · Robibobo1 · commit 45101242e85e · 2024-07-04T13:48:00.000+02:00
Oversampling factor does not impact the resolution Corrected this by adjusting the resolution with the oversampling factor More info in the pull request Fixes: #74607 Signed-off-by: Robin Carrupt <robincarrupt@gmail.com>
diff --git a/include/zephyr/drivers/adc.h b/include/zephyr/drivers/adc.h
@@ -929,6 +929,11 @@ static inline int adc_raw_to_millivolts_dt(const struct adc_dt_spec *spec,
 		resolution -= 1U;
 	}
 
+	/* Adjust resolution with the oversampling factor */
+	if (spec->oversampling) {
+		resolution += spec->oversampling >> 1U;
+	}
+
 	return adc_raw_to_millivolts(vref_mv, spec->channel_cfg.gain,
 				     resolution, valp);
 }

Original file line number	Diff line number	Diff line change
`@@ -929,6 +929,11 @@ static inline int adc_raw_to_millivolts_dt(const struct adc_dt_spec *spec,`
`929`	`929`	`resolution -= 1U;`
`930`	`930`	`}`
`931`	`931`
	`932`	`+ /* Adjust resolution with the oversampling factor */`
	`933`	`+ if (spec->oversampling) {`
	`934`	`+ resolution += spec->oversampling >> 1U;`
	`935`	`+ }`
	`936`	`+`
`932`	`937`	`return adc_raw_to_millivolts(vref_mv, spec->channel_cfg.gain,`
`933`	`938`	`resolution, valp);`
`934`	`939`	`}`