boards/arm/disco_l475_iot1/disco_l475_iot1_defconfig

# SPDX-License-Identifier: Apache-2.0

CONFIG_ARM=y
CONFIG_BOARD_DISCO_L475_IOT1=y
CONFIG_SOC_SERIES_STM32L4X=y
CONFIG_SOC_STM32L475XX=y
# 80MHz system clock
CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=80000000

# enable uart driver
CONFIG_SERIAL=y
CONFIG_UART_INTERRUPT_DRIVEN=y

# enable pinmux
CONFIG_PINMUX=y

# enable GPIO
CONFIG_GPIO=y

# clock configuration
CONFIG_CLOCK_CONTROL=y
CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL=y
# use HSI as PLL input
CONFIG_CLOCK_STM32_PLL_SRC_HSI=y

# 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

# Configure bus clocks
CONFIG_CLOCK_STM32_AHB_PRESCALER=1
CONFIG_CLOCK_STM32_APB1_PRESCALER=1
CONFIG_CLOCK_STM32_APB2_PRESCALER=1

# LSE oscillator is populated, enable MSI PLL-Mode
CONFIG_CLOCK_STM32_LSE=y
CONFIG_CLOCK_STM32_MSI_PLL_MODE=y

# console
CONFIG_CONSOLE=y
CONFIG_UART_CONSOLE=y

# enable MPU
CONFIG_ARM_MPU=y