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ITE drivers/watchdog: reduce interval of warning timer

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Reduce interval of warning timer, so we can print more
warning messages (ex. MEPC, task ID...) before watchdog reset.

Signed-off-by: Ruibin Chang <ruibin.chang@ite.com.tw>
This commit is contained in:
Ruibin Chang 2021-08-17 11:00:57 +08:00 • committed by Christopher Friedt
commit 2877bdcdfe
1 changed files with 5 additions and 3 deletions
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8
drivers/watchdog/wdt_ite_it8xxx2.c
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@ -199,7 +199,6 @@ static void wdt_it8xxx2_isr(const struct device *dev)
{
struct wdt_it8xxx2_data *data = DRV_DATA(dev);
struct wdt_it8xxx2_regs *const inst = DRV_REG(dev);
uint16_t cnt0 = WARNING_TIMER_PERIOD_MS_TO_1024HZ_COUNT(data->timeout);
/* clear pre-warning timer1 interrupt status */
ite_intc_isr_clear(DT_INST_IRQN(0));
@ -213,10 +212,13 @@ static void wdt_it8xxx2_isr(const struct device *dev)
}
/*
* Reduce interval of warning timer, so we can print more
* warning messages during critical period.
* Once warning timer triggered: if watchdog timer isn't reloaded,
* then we will reduce interval of warning timer to 30ms to print
* more warning messages before watchdog reset.
*/
if (!wdt_warning_fired++) {
uint16_t cnt0 = WARNING_TIMER_PERIOD_MS_TO_1024HZ_COUNT(30);
/* pre-warning timer1 is 16-bit counter down timer */
inst->ET1CNTLHR = (cnt0 >> 8) & 0xff;
inst->ET1CNTLLR = cnt0 & 0xff;