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soc: arm: stm32 SYS_CLOCK_TICKS_PER_SEC config with STM32_LPTIM_TIMER

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Configure the SYS_CLOCK_TICKS_PER_SEC directly from the
DTS st-prescaler property of the lptim node
aka stm32_lp_tick_source

Signed-off-by: Francois Ramu <francois.ramu@st.com>
This commit is contained in:
Francois Ramu 2023-10-12 13:25:20 +02:00 • committed by Fabio Baltieri
commit 5bacc2eaac
1 changed files with 19 additions and 2 deletions
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21
soc/arm/st_stm32/common/Kconfig.defconfig.series
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@ -13,6 +13,9 @@ config CORTEX_M_SYSTICK
DT_STM32_RCC_PATH := $(dt_nodelabel_path,rcc)
DT_STM32_RCC_CLOCK_FREQ := $(dt_node_int_prop_int,$(DT_STM32_RCC_PATH),clock-frequency)
DT_ST_PRESCALER := st,prescaler
DT_STM32_LPTIM_PATH := $(dt_nodelabel_path,stm32_lp_tick_source)
config SYS_CLOCK_HW_CYCLES_PER_SEC
default "$(DT_STM32_RCC_CLOCK_FREQ)" if "$(dt_nodelabel_enabled,rcc)"
@ -24,9 +27,23 @@ config LOG_BACKEND_SWO_REF_FREQ_HZ
endif # LOG_BACKEND_SWO
# set the tick per sec as a divider of the LPTIM clock source
# with a minimum value of 4096 for SYS_CLOCK_TICKS_PER_SEC to keep
# SYS_CLOCK_TICKS_PER_SEC not too high compared to the LPTIM counter clock
config SYS_CLOCK_TICKS_PER_SEC
default 4096 if STM32_LPTIM_TIMER && STM32_LPTIM_CLOCK_LSE
default 4000 if STM32_LPTIM_TIMER && STM32_LPTIM_CLOCK_LSI
default 4096 if "$(dt_node_int_prop_int,$(DT_STM32_LPTIM_PATH),$(DT_ST_PRESCALER))" < 16
default 2048 if "$(dt_node_int_prop_int,$(DT_STM32_LPTIM_PATH),$(DT_ST_PRESCALER))" = 16
default 1024 if "$(dt_node_int_prop_int,$(DT_STM32_LPTIM_PATH),$(DT_ST_PRESCALER))" = 32
default 512 if "$(dt_node_int_prop_int,$(DT_STM32_LPTIM_PATH),$(DT_ST_PRESCALER))" = 64
default 256 if "$(dt_node_int_prop_int,$(DT_STM32_LPTIM_PATH),$(DT_ST_PRESCALER))" = 128
depends on STM32_LPTIM_TIMER && STM32_LPTIM_CLOCK_LSE
config SYS_CLOCK_TICKS_PER_SEC
default 4000 if "$(dt_node_int_prop_int,$(DT_STM32_LPTIM_PATH),$(DT_ST_PRESCALER))" < 16
default 2000 if "$(dt_node_int_prop_int,$(DT_STM32_LPTIM_PATH),$(DT_ST_PRESCALER))" = 16
default 1000 if "$(dt_node_int_prop_int,$(DT_STM32_LPTIM_PATH),$(DT_ST_PRESCALER))" = 32
default 500 if "$(dt_node_int_prop_int,$(DT_STM32_LPTIM_PATH),$(DT_ST_PRESCALER))" = 64
default 250 if "$(dt_node_int_prop_int,$(DT_STM32_LPTIM_PATH),$(DT_ST_PRESCALER))" = 128
depends on STM32_LPTIM_TIMER && STM32_LPTIM_CLOCK_LSI
config CLOCK_CONTROL_STM32_CUBE
default y