drivers: esp32: add check for absolute alarm configuration

ESP32 counter based on Timer or RTC misses the
COUNTER_ALARM_CFG_ABSOLUTE flag check.

Signed-off-by: Sylvio Alves <[email protected]>

Author: sylvioalves

drivers/counter/counter_esp32_rtc.c

@@ -107,8 +107,13 @@ static int counter_esp32_set_alarm(const struct device *dev, uint8_t chan_id,
 
 	counter_esp32_get_value(dev, &now);
 
+	if ((alarm_cfg->flags & COUNTER_ALARM_CFG_ABSOLUTE) == 0) {
+		WRITE_PERI_REG(RTC_CNTL_SLP_TIMER0_REG, (now + alarm_cfg->ticks));
+	} else {
+		WRITE_PERI_REG(RTC_CNTL_SLP_TIMER0_REG, alarm_cfg->ticks);
+	}
+
 	/* RTC main timer set alarm value */
-	WRITE_PERI_REG(RTC_CNTL_SLP_TIMER0_REG, (now + alarm_cfg->ticks));
 	CLEAR_PERI_REG_MASK(RTC_CNTL_SLP_TIMER1_REG, 0xffffffff);
 
 	/* RTC main timer interrupt enable */

drivers/counter/counter_esp32_tmr.c

@@ -140,9 +140,15 @@ static int counter_esp32_set_alarm(const struct device *dev, uint8_t chan_id,
 	uint32_t now;
 
 	counter_esp32_get_value(dev, &now);
+
 	k_spinlock_key_t key = k_spin_lock(&lock);
 
-	timer_hal_set_alarm_value(&data->hal_ctx, (now + alarm_cfg->ticks));
+	if ((alarm_cfg->flags & COUNTER_ALARM_CFG_ABSOLUTE) == 0) {
+		timer_hal_set_alarm_value(&data->hal_ctx, (now + alarm_cfg->ticks));
+	} else {
+		timer_hal_set_alarm_value(&data->hal_ctx, alarm_cfg->ticks);
+	}
+
 	timer_hal_intr_enable(&data->hal_ctx);
 	timer_hal_set_alarm_enable(&data->hal_ctx, TIMER_ALARM_EN);
 	data->alarm_cfg.callback = alarm_cfg->callback;