# Kconfig - STM32 MCU clock control driver config # # Copyright (c) 2017 Linaro # # SPDX-License-Identifier: Apache-2.0 # if SOC_FAMILY_STM32 menuconfig CLOCK_CONTROL_STM32_CUBE bool prompt "STM32 Reset & Clock Control" depends on CLOCK_CONTROL default n if SOC_SERIES_STM32 help Enable driver for Reset & Clock Control subsystem found in STM32 family of MCUs if CLOCK_CONTROL_STM32_CUBE config CLOCK_CONTROL_STM32_DEVICE_INIT_PRIORITY int "Clock Control Device Priority" default 1 help This option controls the priority of clock control device initialization. Higher priority ensures that the device is initialized earlier in the startup cycle. If unsure, leave at default value 1 choice prompt "STM32 System Clock Source" default CLOCK_STM32_SYSCLK_SRC_PLL config CLOCK_STM32_SYSCLK_SRC_HSE bool "HSE" help Use HSE as source of SYSCLK config CLOCK_STM32_SYSCLK_SRC_HSI bool "HSI" help Use HSI as source of SYSCLK config CLOCK_STM32_SYSCLK_SRC_PLL bool "PLL" help Use PLL as source of SYSCLK endchoice config CLOCK_STM32_HSE_BYPASS bool "HSE bypass" depends on CLOCK_STM32_SYSCLK_SRC_HSE || CLOCK_STM32_PLL_SRC_HSE help Enable this option to bypass external high-speed clock (HSE). config CLOCK_STM32_HSE_CLOCK int "HSE clock value" depends on CLOCK_STM32_SYSCLK_SRC_HSE || CLOCK_STM32_PLL_SRC_HSE help Value of external high-speed clock (HSE). choice prompt "STM32 PLL Clock Source" depends on CLOCK_STM32_SYSCLK_SRC_PLL default CLOCK_STM32_PLL_SRC_HSI config CLOCK_STM32_PLL_SRC_MSI bool "MSI" help Use MSI as source of PLL config CLOCK_STM32_PLL_SRC_HSI bool "HSI" help Use HSI as source of PLL config CLOCK_STM32_PLL_SRC_HSE bool "HSE" help Use HSE as source of PLL config CLOCK_STM32_PLL_SRC_PLL2 bool "PLL2" depends on SOC_STM32F10X_CONNECTIVITY_LINE_DEVICE help Use PLL2 as source of main PLL. This is equivalent of defining PLL2 as source PREDIV1SCR. If not selected, default source is HSE. endchoice if SOC_SERIES_STM32F1X config CLOCK_STM32_PLL_XTPRE bool "HSE to PLL /2 prescaler" depends on SOC_STM32F10X_DENSITY_DEVICE && CLOCK_STM32_PLL_SRC_HSE help Enable this option to enable /2 prescaler on HSE to PLL clock signal config CLOCK_STM32_PLL_MULTIPLIER int "PLL multiplier" depends on CLOCK_STM32_SYSCLK_SRC_PLL default 9 range 2 16 if SOC_STM32F10X_DENSITY_DEVICE range 4 9 if SOC_STM32F10X_CONNECTIVITY_LINE_DEVICE help PLL multiplier, PLL output must not exceed 72MHz. Allowed values: Density devices: 2-16 Connectivity devices: 4 - 9 and 13 ( used for multiplication factor 6.5). config CLOCK_STM32_PLL_PREDIV1 int "PREDIV1 Prescaler" depends on SOC_STM32F10X_CONNECTIVITY_LINE_DEVICE && CLOCK_STM32_SYSCLK_SRC_PLL default 1 range 1 16 help PREDIV1 is PLL clock signal prescaler, allowed values: 1 - 16. config CLOCK_STM32_PLL2_MULTIPLIER int "PLL2 multiplier" depends on SOC_STM32F10X_CONNECTIVITY_LINE_DEVICE && CLOCK_STM32_PLL_SRC_PLL2 default 8 range 8 20 help PLL2 multiplier, allowed values: 8 - 20. 15-17-18-19 reserved config CLOCK_STM32_PLL2_PREDIV2 int "PREDIV2 Prescaler" depends on SOC_STM32F10X_CONNECTIVITY_LINE_DEVICE && CLOCK_STM32_PLL_SRC_PLL2 default 1 range 1 16 help PREDIV2 is PLL2 prescaler, allowed values: 1 - 16. endif # SOC_SERIES_STM32F1X if SOC_SERIES_STM32F3X config CLOCK_STM32_PLL_PREDIV int "PREDIV Prescaler" default 1 range 1 16 help PREDIV is PLLSCR clock signal prescaler, allowed values: 1 - 16. config CLOCK_STM32_PLL_PREDIV1 int "PREDIV1 Prescaler" depends on CLOCK_STM32_PLL_SRC_HSE && (SOC_STM32F302XE || SOC_STM32F303XE || SOC_STM32F398XX) default 1 range 1 16 help PREDIV is PLLSCR clock signal prescaler, present on STM32F302xE, STM32F303xE and STM32F39xx SoCs. Allowed values: 1 - 16. config CLOCK_STM32_PLL_MULTIPLIER int "PLL multiplier" depends on CLOCK_STM32_SYSCLK_SRC_PLL default 9 range 2 16 help PLL multiplier, allowed values: 2-16. PLL output must not exceed 72MHz. endif # SOC_SERIES_STM32F3X if SOC_SERIES_STM32F4X config CLOCK_STM32_PLL_M_DIVISOR int "Division factor for PLL VCO input clock" depends on CLOCK_STM32_SYSCLK_SRC_PLL default 8 range 2 63 help PLLM division factor needs to be set correctly to ensure that the VCO input frequency ranges from 1 to 2 MHz. It is recommended to select a frequency of 2 MHz to limit PLL jitter. Allowed values: 2-63 config CLOCK_STM32_PLL_N_MULTIPLIER int "Multiplier factor for PLL VCO output clock" depends on CLOCK_STM32_SYSCLK_SRC_PLL default 336 range 192 432 if SOC_STM32F401XE range 50 432 help PLLN multiplier factor needs to be set correctly to ensure that the VCO output frequency is between 100 and 432 MHz, except on STM32F401 where the frequency must be between 192 and 432 MHz. Allowed values: 50-432 (STM32F401: 192-432) config CLOCK_STM32_PLL_P_DIVISOR int "PLL division factor for main system clock" depends on CLOCK_STM32_SYSCLK_SRC_PLL default 4 range 2 8 help PLLP division factor needs to be set correctly to not exceed 84MHz. Allowed values: 2, 4, 6, 8 config CLOCK_STM32_PLL_Q_DIVISOR int "Division factor for OTG FS, SDIO and RNG clocks" depends on CLOCK_STM32_SYSCLK_SRC_PLL default 7 range 2 15 help The USB OTG FS requires a 48MHz clock to work correctly. SDIO and RNG need a frequency lower than or equal to 48 MHz to work correctly. Allowed values: 2-15 endif # SOC_SERIES_STM32F4X if SOC_SERIES_STM32L4X config CLOCK_STM32_PLL_M_DIVISOR int "PLL divisor" depends on CLOCK_STM32_SYSCLK_SRC_PLL default 1 range 1 8 help PLL divisor, allowed values: 1-8. With this ensure that the PLL VCO input frequency ranges from 4 to 16MHz. config CLOCK_STM32_PLL_N_MULTIPLIER int "PLL multiplier" depends on CLOCK_STM32_SYSCLK_SRC_PLL default 20 range 8 86 help PLL multiplier, allowed values: 2-16. PLL output must not exceed 344MHz. config CLOCK_STM32_PLL_P_DIVISOR int "PLL P Divisor" depends on CLOCK_STM32_SYSCLK_SRC_PLL default 7 range 0 17 help PLL P Output divisor, allowed values: 0, 7, 17. config CLOCK_STM32_PLL_Q_DIVISOR int "PLL Q Divisor" depends on CLOCK_STM32_SYSCLK_SRC_PLL default 2 range 0 8 help PLL Q Output divisor, allowed values: 0, 2, 4, 6, 8. config CLOCK_STM32_PLL_R_DIVISOR int "PLL R Divisor" depends on CLOCK_STM32_SYSCLK_SRC_PLL default 4 range 0 8 help PLL R Output divisor, allowed values: 0, 2, 4, 6, 8. endif # SOC_SERIES_STM32L4X config CLOCK_STM32_AHB_PRESCALER int "AHB prescaler" default 0 range 0 512 help AHB prescaler, allowed values: 1, 2, 4, 8, 16, 64, 128, 256, 512. config CLOCK_STM32_APB1_PRESCALER int "APB1 prescaler" default 1 range 1 16 help APB1 Low speed clock (PCLK1) prescaler, allowed values: 1, 2, 4, 8, 16 config CLOCK_STM32_APB2_PRESCALER int "APB2 prescaler" default 1 range 1 16 help APB2 High speed clock (PCLK2) prescaler, allowed values: 1, 2, 4, 8, 16 endif # CLOCK_CONTROL_STM32_CUBE endif # SOC_FAMILY_STM32