drivers: timer: Fix timing in suspend-to-ram (2c88cc08) · Commits · Wenxi XU / zephyr

Fix timing in suspend-to-ram when using STM32WBA. Switch to use RTC timer should be done only when idle is set and LPTIM clocks should be switched off Signed-off-by:

Adam Berlinger <adam.berlinger@st.com>

drivers/timer/stm32_lptim_timer.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -204,7 +204,7 @@ void sys_clock_set_timeout(int32_t ticks, bool idle)

		next = pm_policy_next_state(CURRENT_CPU, ticks);

		if ((next != NULL) && (next->state == PM_STATE_SUSPEND_TO_RAM)) {
		if ((next != NULL) && idle && (next->state == PM_STATE_SUSPEND_TO_RAM)) {
		uint64_t timeout_us =
		((uint64_t)ticks * USEC_PER_SEC) / CONFIG_SYS_CLOCK_TICKS_PER_SEC;

		@@ -230,6 +230,9 @@ 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();

		/* Stop clocks for LPTIM, since RTC is used instead */
		clock_control_off(clk_ctrl, (clock_control_subsys_t) &lptim_clk[0]);

		return;
		}
		#endif /* CONFIG_STM32_LPTIM_STDBY_TIMER */

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