drivers: timer: Fix interrupt management in stm32 lptim timer

Fix interrupt management issue in stm32 lptim timer

Signed-off-by: Alessandro Manganaro <[email protected]>

Author: asm5878

drivers/timer/stm32_lptim_timer.c

@@ -244,6 +244,9 @@ void sys_clock_set_timeout(int32_t ticks, bool idle)
 		counter_get_value(stdby_timer, &stdby_timer_pre_stdby);
 		lptim_cnt_pre_stdby = z_clock_lptim_getcounter();
 
+		LL_LPTIM_DisableIT_ARROK(LPTIM);
+		LL_LPTIM_ClearFlag_ARROK(LPTIM);
+		NVIC_ClearPendingIRQ(DT_INST_IRQN(0));
 		/* Stop clocks for LPTIM, since RTC is used instead */
 		clock_control_off(clk_ctrl, (clock_control_subsys_t) &lptim_clk[0]);
 
@@ -552,6 +555,7 @@ static int sys_clock_driver_init(void)
 	LL_LPTIM_ClearFLAG_ARRM(LPTIM);
 
 	/* ARROK bit validates the write operation to ARR register */
+	autoreload_ready = true;
 	LL_LPTIM_EnableIT_ARROK(LPTIM);
 	stm32_lptim_wait_ready();
 	LL_LPTIM_ClearFlag_ARROK(LPTIM);