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stm32: drivers: adc : exclude differential input support on stm32u3 serie #93578

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stm32: drivers: adc : exclude differential input support on stm32u3 serie #93578

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This PR add change to avoid following build error :

zephyrproject/zephyr/drivers/adc/adc_stm32.c:503:68: error: 'LL_ADC_DIFFERENTIAL_ENDED' undeclared (first use in this function)
  503 |         uint32_t calib_type = single_ended ? LL_ADC_SINGLE_ENDED : LL_ADC_DIFFERENTIAL_ENDED;
      |                                                                    ^~~~~~~~~~~~~~~~~~~~~~~~~

To reproduce :

west build -p -b nucleo_u385rg_q tests/drivers/adc/adc_api/

@djiatsaf-st
drivers: adc: stm32: exclude differential input support on U3 serie
74961c8 
According to RM0487 S22.3, table 175,for STM32U3 series,
ADC channel ending can't be set as differential input.

Signed-off-by: Fabrice DJIATSA <fabrice.djiatsa-ext@st.com>
@zephyrbot zephyrbot added area: ADC Analog-to-Digital Converter (ADC) size: XS A PR changing only a single line of code platform: STM32 ST Micro STM32 labels Jul 23, 2025
@sonarqubecloud SonarQubeCloud
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Quality Gate Passed Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

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area: ADC Analog-to-Digital Converter (ADC) platform: STM32 ST Micro STM32 size: XS A PR changing only a single line of code
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