boards: arm: stm32f3_disco: add ADC support

Add support of ADC

Signed-off-by: Alexandre Bourdiol <alexandre.bourdiol@st.com>

boards/arm/stm32f3_disco/doc/index.rst

@@ -100,7 +100,8 @@ features:
 +-----------+------------+-------------------------------------+
 | PWM       | on-chip    | pwm                                 |
 +-----------+------------+-------------------------------------+
-
+| ADC       | on-chip    | adc                                 |
++-----------+------------+-------------------------------------+
 
 Other hardware features are not yet supported on Zephyr porting.
 
@@ -152,6 +153,7 @@ Default Zephyr Peripheral Mapping:
 - LD9 : PE12
 - LD10 : PE13
 - PWM : PA8
+- ADC1 : PA0
 
 System Clock
 ============

boards/arm/stm32f3_disco/pinmux.c

@@ -57,6 +57,9 @@ static const struct pin_config pinconf[] = {
 #if DT_NODE_HAS_STATUS(DT_NODELABEL(pwm1), okay) && CONFIG_PWM
 	{ STM32_PIN_PA8, STM32F3_PINMUX_FUNC_PA8_PWM1_CH1},
 #endif
+#if DT_NODE_HAS_STATUS(DT_NODELABEL(adc1), okay) && CONFIG_ADC
+	{STM32_PIN_PA0, STM32F3_PINMUX_FUNC_PA0_ADC1_IN1},
+#endif
 };
 
 static int pinmux_stm32_init(const struct device *port)

boards/arm/stm32f3_disco/stm32f3_disco.dts

@@ -152,3 +152,7 @@
 		status = "okay";
 	};
 };
+
+&adc1 {
+	status = "okay";
+};

boards/arm/stm32f3_disco/stm32f3_disco.yaml

@@ -18,3 +18,4 @@ supported:
   - nvs
   - can
   - pwm
+  - adc

tests/drivers/adc/adc_api/src/test_adc.c

@@ -146,6 +146,7 @@
 #elif defined(CONFIG_BOARD_NUCLEO_F091RC) || \
 	defined(CONFIG_BOARD_NUCLEO_F103RB) || \
 	defined(CONFIG_BOARD_NUCLEO_F207ZG) || \
+	defined(CONFIG_BOARD_STM32F3_DISCO) || \
 	defined(CONFIG_BOARD_NUCLEO_F401RE) || \
 	defined(CONFIG_BOARD_NUCLEO_F429ZI) || \
 	defined(CONFIG_BOARD_NUCLEO_F746ZG) || \