6  * SPDX-License-Identifier: Apache-2.0
36 /* Seconds from 1970-01-01T00:00:00 to 2000-01-01T00:00:00 */
81 #define RTC_ASYNCPRE (RTCCLK_FREQ - 1)
84 /* Adjust the second sync prescaler to get 1Hz on ck_spre */
85 #define RTC_SYNCPRE ((RTCCLK_FREQ / (1 + RTC_ASYNCPRE)) - 1)
190 	const struct rtc_stm32_config *cfg = dev->config;  in rtc_stm32_start()
193 	if (clock_control_on(clk, (clock_control_subsys_t) &cfg->pclken[0]) != 0) {  in rtc_stm32_start()
195 		return -EIO;  in rtc_stm32_start()
213 	const struct rtc_stm32_config *cfg = dev->config;  in rtc_stm32_stop()
216 	if (clock_control_off(clk, (clock_control_subsys_t) &cfg->pclken[0]) != 0) {  in rtc_stm32_stop()
218 		return -EIO;  in rtc_stm32_stop()
266 	/* Convert calendar datetime to UNIX timestamp */  in rtc_stm32_read()
271 	/* tm_mon allowed values are 0-11 */  in rtc_stm32_read()
272 	now.tm_mon = __LL_RTC_CONVERT_BCD2BIN(__LL_RTC_GET_MONTH(rtc_date)) - 1;  in rtc_stm32_read()
282 	ts -= T_TIME_OFFSET;  in rtc_stm32_read()
289 	 * down starting from the sync prescaler value. Add already counted  in rtc_stm32_read()
292 	ticks += RTC_SYNCPRE - rtc_subseconds;  in rtc_stm32_read()
352 	struct rtc_stm32_data *data = dev->data;  in rtc_stm32_set_alarm()
355 	tick_t ticks = alarm_cfg->ticks;  in rtc_stm32_set_alarm()
357 	if (data->callback != NULL) {  in rtc_stm32_set_alarm()
359 		return -EBUSY;  in rtc_stm32_set_alarm()
363 	data->callback = alarm_cfg->callback;  in rtc_stm32_set_alarm()
364 	data->user_data = alarm_cfg->user_data;  in rtc_stm32_set_alarm()
367 	if ((alarm_cfg->flags & COUNTER_ALARM_CFG_ABSOLUTE) == 0) {  in rtc_stm32_set_alarm()
383 	if ((alarm_cfg->flags & COUNTER_ALARM_CFG_ABSOLUTE) == 0) {  in rtc_stm32_set_alarm()
390 	 * not when the counter matches, so set -1  in rtc_stm32_set_alarm()
392 	remain--;  in rtc_stm32_set_alarm()
415 	remain -= rtc_alarm.AlarmTime.Hours * 3600;  in rtc_stm32_set_alarm()
417 	remain -= rtc_alarm.AlarmTime.Minutes * 60;  in rtc_stm32_set_alarm()
426 		return -EIO;  in rtc_stm32_set_alarm()
433 	LL_RTC_ALMA_SetSubSecond(RTC, RTC_SYNCPRE - alarm_val_ss);  in rtc_stm32_set_alarm()
452 	if ((ticks - now < 2) || (now > ticks)) {  in rtc_stm32_set_alarm()
453 		data->irq_on_late = 1;  in rtc_stm32_set_alarm()
464 	struct rtc_stm32_data *data = dev->data;  in rtc_stm32_cancel_alarm()
472 	data->callback = NULL;  in rtc_stm32_cancel_alarm()
486 	const struct counter_config_info *info = dev->config;  in rtc_stm32_get_top_value()
488 	return info->max_top_value;  in rtc_stm32_get_top_value()
495 	const struct counter_config_info *info = dev->config;  in rtc_stm32_set_top_value()
497 	if ((cfg->ticks != info->max_top_value) ||  in rtc_stm32_set_top_value()
498 		!(cfg->flags & COUNTER_TOP_CFG_DONT_RESET)) {  in rtc_stm32_set_top_value()
499 		return -ENOTSUP;  in rtc_stm32_set_top_value()
509 	struct rtc_stm32_data *data = dev->data;  in rtc_stm32_isr()
510 	counter_alarm_callback_t alarm_callback = data->callback;  in rtc_stm32_isr()
516 	    || (data->irq_on_late && ll_func_isenabled_interrupt_alarm(RTC))  in rtc_stm32_isr()
526 		data->irq_on_late = 0;  in rtc_stm32_isr()
530 			data->callback = NULL;  in rtc_stm32_isr()
531 			alarm_callback(dev, 0, now, data->user_data);  in rtc_stm32_isr()
553 	const struct rtc_stm32_config *cfg = dev->config;  in rtc_stm32_init()
554 	struct rtc_stm32_data *data = dev->data;  in rtc_stm32_init()
556 	data->callback = NULL;  in rtc_stm32_init()
560 		return -ENODEV;  in rtc_stm32_init()
564 	if (clock_control_on(clk, (clock_control_subsys_t) &cfg->pclken[0]) != 0) {  in rtc_stm32_init()
566 		return -EIO;  in rtc_stm32_init()
578 				    (clock_control_subsys_t) &cfg->pclken[1],  in rtc_stm32_init()
581 		return -EIO;  in rtc_stm32_init()
592 		return -EIO;  in rtc_stm32_init()
597 			      &cfg->ll_rtc_config)) != SUCCESS) {  in rtc_stm32_init()
598 		return -EIO;  in rtc_stm32_init()
655 	const struct rtc_stm32_config *cfg = dev->config;  in rtc_stm32_pm_action()
660 		if (clock_control_on(clk, (clock_control_subsys_t) &cfg->pclken[0]) != 0) {  in rtc_stm32_pm_action()
662 			return -EIO;  in rtc_stm32_pm_action()
668 		return -ENOTSUP;  in rtc_stm32_pm_action()