zephyr/boards/arm/nucleo_l476rg/nucleo_l476rg_defconfig

CONFIG_ARM=y
CONFIG_BOARD_STM32_NUCLEO_L476RG=y
CONFIG_SOC_FAMILY_STM32=y
CONFIG_SOC_SERIES_STM32L4X=y
CONFIG_SOC_STM32L476XX=y
CONFIG_CORTEX_M_SYSTICK=y
# 80MHz system clock
CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=80000000

# enable uart driver
CONFIG_SERIAL=y
CONFIG_UART_STM32=y
CONFIG_UART_STM32_PORT_2=y
CONFIG_UART_STM32_PORT_2_BAUD_RATE=115200

# enable pinmux
CONFIG_PINMUX=y
CONFIG_PINMUX_STM32=y

# enable GPIOs
CONFIG_GPIO=y
CONFIG_GPIO_STM32=y
CONFIG_GPIO_STM32_PORTA=y
CONFIG_GPIO_STM32_PORTB=y
CONFIG_GPIO_STM32_PORTC=y
CONFIG_GPIO_STM32_PORTD=y
CONFIG_GPIO_STM32_PORTE=y
CONFIG_GPIO_STM32_PORTF=y
CONFIG_GPIO_STM32_PORTG=y
CONFIG_GPIO_STM32_PORTH=y

# clock configuration
CONFIG_CLOCK_CONTROL=y
CONFIG_CLOCK_CONTROL_STM32_CUBE=y
# SYSCLK selection
CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL=y
# PLL configuration
CONFIG_CLOCK_STM32_PLL_SRC_HSI
# produce 80MHz clock at PLL output
CONFIG_CLOCK_STM32_PLL_M_DIVISOR=1
CONFIG_CLOCK_STM32_PLL_N_MULTIPLIER=20
CONFIG_CLOCK_STM32_PLL_P_DIVISOR=7
CONFIG_CLOCK_STM32_PLL_Q_DIVISOR=2
CONFIG_CLOCK_STM32_PLL_R_DIVISOR=4
CONFIG_CLOCK_STM32_AHB_PRESCALER=1
CONFIG_CLOCK_STM32_APB1_PRESCALER=1
CONFIG_CLOCK_STM32_APB2_PRESCALER=1

# console
CONFIG_CONSOLE=y
CONFIG_UART_CONSOLE=y
CONFIG_UART_CONSOLE_ON_DEV_NAME="UART_2"

#enable pwm
CONFIG_PWM=y
CONFIG_PWM_STM32=y
CONFIG_PWM_STM32_2=y

#enable DTS
CONFIG_HAS_DTS=y