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drivers: adc: Add support for gain 2/7 in nRF devices

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Extend current adc gains with new entry 2/7.

Signed-off-by: Karol Lasończyk <karol.lasonczyk@nordicsemi.no>
This commit is contained in:
Karol Lasończyk 2025-01-27 14:36:51 +01:00 • committed by Benjamin Cabé
commit 057de458e2
4 changed files with 9 additions and 0 deletions
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1
drivers/adc/adc_common.c
View file

@ -17,6 +17,7 @@ int adc_gain_invert(enum adc_gain gain,
[ADC_GAIN_1_6] = {.mul = 6, .div = 1},
[ADC_GAIN_1_5] = {.mul = 5, .div = 1},
[ADC_GAIN_1_4] = {.mul = 4, .div = 1},
[ADC_GAIN_2_7] = {.mul = 7, .div = 2},
[ADC_GAIN_1_3] = {.mul = 3, .div = 1},
[ADC_GAIN_2_5] = {.mul = 5, .div = 2},
[ADC_GAIN_1_2] = {.mul = 2, .div = 1},

5
drivers/adc/adc_nrfx_saadc.c
View file

@ -202,6 +202,11 @@ static int adc_nrfx_channel_setup(const struct device *dev,
config.gain = NRF_SAADC_GAIN1_4;
break;
#endif
#if defined(SAADC_CH_CONFIG_GAIN_Gain2_7)
case ADC_GAIN_2_7:
config.gain = NRF_SAADC_GAIN2_7;
break;
#endif
#if defined(SAADC_CH_CONFIG_GAIN_Gain1_3) || defined(SAADC_CH_CONFIG_GAIN_Gain2_6)
case ADC_GAIN_1_3:
config.gain = NRF_SAADC_GAIN1_3;

2
dts/bindings/adc/adc-controller.yaml
View file

@ -41,6 +41,7 @@ child-binding:
- ADC_GAIN_1_6: x 1/6
- ADC_GAIN_1_5: x 1/5
- ADC_GAIN_1_4: x 1/4
- ADC_GAIN_2_7: x 2/7
- ADC_GAIN_1_3: x 1/3
- ADC_GAIN_2_5: x 2/5
- ADC_GAIN_1_2: x 1/2
@ -62,6 +63,7 @@ child-binding:
- "ADC_GAIN_1_6"
- "ADC_GAIN_1_5"
- "ADC_GAIN_1_4"
- "ADC_GAIN_2_7"
- "ADC_GAIN_1_3"
- "ADC_GAIN_2_5"
- "ADC_GAIN_1_2"

1
include/zephyr/drivers/adc.h
View file

@ -35,6 +35,7 @@ enum adc_gain {
ADC_GAIN_1_6, /**< x 1/6. */
ADC_GAIN_1_5, /**< x 1/5. */
ADC_GAIN_1_4, /**< x 1/4. */
ADC_GAIN_2_7, /**< x 2/7. */
ADC_GAIN_1_3, /**< x 1/3. */
ADC_GAIN_2_5, /**< x 2/5. */
ADC_GAIN_1_2, /**< x 1/2. */