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drivers: timer: stm32 lptim: Fix the st,timeout runtime check

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Existing check failed on correct settings.
Add an assert to fasten the debug.

Signed-off-by: Erwan Gouriou <erwan.gouriou@st.com>
This commit is contained in:
Erwan Gouriou 2025-07-16 16:30:43 +02:00 committed by Anas Nashif
parent e99db0ddd2
commit a884e3b537
1 changed files with 4 additions and 6 deletions
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10
drivers/timer/stm32_lptim_timer.c
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@ -456,15 +456,13 @@ static int sys_clock_driver_init(void)
#if DT_PROP(DT_NODELABEL(stm32_lp_tick_source), st_timeout)
uint32_t timeout = DT_PROP(DT_NODELABEL(stm32_lp_tick_source), st_timeout);
/*
* Check if prescaler corresponding to st,timeout
* is matching the lptim_clock_presc calculated one from the lptim_clock_freq
* max lptim period is 0xFFFF/(lptim_clock_freq/lptim_clock_presc)
*/
if (timeout > (lptim_clock_presc / lptim_clock_freq) * 0xFFFF) {
if (timeout > (lptim_clock_presc * 0xFFFF) / lptim_clock_freq) {
__ASSERT(0,
"st,timeout can't be higher than range defined by LPTIM presc and freq");
return -EIO;
}
/*
* Define the lptim_time_base that should be set to expire at "timeout" seconds
* running counter at (lptim_clock_freq divided by lptim_clock_presc) Hz