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soc: stm32 devices have lower tick with lower sysclock 

For stm32 platforms where the sysclock is less or equal to
32MHz, the Ticks per second is reduced to 8000 (instead of
10000).

Signed-off-by: Francois Ramu <francois.ramu@st.com>
This commit is contained in:
Francois Ramu 2024-08-05 17:02:56 +02:00 committed by Anas Nashif
parent d561b50695
commit c8e1fdf296
1 changed files with 4 additions and 0 deletions
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4
soc/st/stm32/Kconfig.defconfig
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@ -25,6 +25,10 @@ config LOG_BACKEND_SWO_REF_FREQ_HZ
default "$(DT_STM32_RCC_CLOCK_FREQ)" if "$(dt_nodelabel_enabled,rcc)"
depends on LOG_BACKEND_SWO
# Tick of 10000 is too high for a sysclock lower than 32MHz
config SYS_CLOCK_TICKS_PER_SEC
default 8000 if SYS_CLOCK_HW_CYCLES_PER_SEC <= 32000000
# set the tick per sec as a divider of the LPTIM clock source
# with a minimum value of 4096 for SYS_CLOCK_TICKS_PER_SEC to keep
# SYS_CLOCK_TICKS_PER_SEC not too high compared to the LPTIM counter clock