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/*
* Copyright (c) 2006-2026, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2026-09-03 Alex Yang Add MCXC162 RTC0 support
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <sys/time.h>
#include "fsl_clock.h"
#include "fsl_rtc.h"
#ifdef BSP_USING_RTC
static rt_rtc_dev_t mcxc162_rtc;
static rt_err_t mcxc162_rtc_init(void)
{
rtc_config_t config;
CLOCK_SetupFRO16KClocking(kCLOCK_Clk16kToSysAndCore);
RTC_GetDefaultConfig(&config);
RTC_Init(RTC0, &config);
RTC_StartTimer(RTC0);
return RT_EOK;
}
static rt_err_t mcxc162_rtc_get_secs(time_t *seconds)
{
*seconds = (time_t)RTC0->TSR;
return RT_EOK;
}
static rt_err_t mcxc162_rtc_set_secs(time_t *seconds)
{
if ((rt_uint64_t)*seconds > 0xFFFFFFFFULL)
{
return -RT_EINVAL;
}
RTC_StopTimer(RTC0);
RTC0->TSR = (uint32_t)*seconds;
RTC_StartTimer(RTC0);
#ifdef RT_USING_ALARM
rt_alarm_update(&mcxc162_rtc.parent, 1U);
#endif
return RT_EOK;
}
static rt_err_t mcxc162_rtc_get_alarm(struct rt_rtc_wkalarm *alarm)
{
time_t timestamp = (time_t)RTC0->TAR;
struct tm date;
#ifdef RT_ALARM_USING_LOCAL_TIME
localtime_r(×tamp, &date);
#else
gmtime_r(×tamp, &date);
#endif
alarm->enable = (RTC_GetEnabledInterrupts(RTC0) & kRTC_AlarmInterruptEnable) != 0U;
alarm->tm_sec = date.tm_sec;
alarm->tm_min = date.tm_min;
alarm->tm_hour = date.tm_hour;
alarm->tm_mday = date.tm_mday;
alarm->tm_mon = date.tm_mon;
alarm->tm_year = date.tm_year;
return RT_EOK;
}
static rt_err_t mcxc162_rtc_set_alarm(struct rt_rtc_wkalarm *alarm)
{
rtc_datetime_t date;
struct tm calendar = {
.tm_sec = alarm->tm_sec,
.tm_min = alarm->tm_min,
.tm_hour = alarm->tm_hour,
.tm_mday = alarm->tm_mday,
.tm_mon = alarm->tm_mon,
.tm_year = alarm->tm_year,
};
#ifdef RT_ALARM_USING_LOCAL_TIME
time_t timestamp;
#endif
if (!alarm->enable)
{
RTC_DisableInterrupts(RTC0, kRTC_AlarmInterruptEnable);
DisableIRQ(RTC_IRQn);
RTC_ClearStatusFlags(RTC0, kRTC_AlarmFlag);
return RT_EOK;
}
#ifdef RT_ALARM_USING_LOCAL_TIME
calendar.tm_isdst = -1;
timestamp = mktime(&calendar);
if (timestamp == (time_t)-1)
{
return -RT_EINVAL;
}
gmtime_r(×tamp, &calendar);
#endif
date.second = (uint8_t)calendar.tm_sec;
date.minute = (uint8_t)calendar.tm_min;
date.hour = (uint8_t)calendar.tm_hour;
date.day = (uint8_t)calendar.tm_mday;
date.month = (uint8_t)(calendar.tm_mon + 1);
date.year = (uint16_t)(calendar.tm_year + 1900);
if (RTC_SetAlarm(RTC0, &date) != kStatus_Success || RTC0->TAR <= RTC0->TSR)
{
RTC_DisableInterrupts(RTC0, kRTC_AlarmInterruptEnable);
DisableIRQ(RTC_IRQn);
RTC_ClearStatusFlags(RTC0, kRTC_AlarmFlag);
return -RT_EINVAL;
}
RTC_ClearStatusFlags(RTC0, kRTC_AlarmFlag);
RTC_EnableInterrupts(RTC0, kRTC_AlarmInterruptEnable);
NVIC_ClearPendingIRQ(RTC_IRQn);
EnableIRQ(RTC_IRQn);
return RT_EOK;
}
static const struct rt_rtc_ops mcxc162_rtc_ops = {
.init = mcxc162_rtc_init,
.get_secs = mcxc162_rtc_get_secs,
.set_secs = mcxc162_rtc_set_secs,
.get_alarm = mcxc162_rtc_get_alarm,
.set_alarm = mcxc162_rtc_set_alarm,
.get_timeval = RT_NULL,
.set_timeval = RT_NULL,
};
void RTC_IRQHandler(void)
{
rt_interrupt_enter();
if ((RTC_GetStatusFlags(RTC0) & kRTC_AlarmFlag) != 0U)
{
RTC_ClearStatusFlags(RTC0, kRTC_AlarmFlag);
#ifdef RT_USING_ALARM
rt_alarm_update(&mcxc162_rtc.parent, 1U);
#endif
}
rt_interrupt_leave();
SDK_ISR_EXIT_BARRIER;
}
int rt_hw_rtc_init(void)
{
rt_err_t result;
mcxc162_rtc.ops = &mcxc162_rtc_ops;
result = rt_hw_rtc_register(&mcxc162_rtc, "rtc", RT_DEVICE_FLAG_RDWR, RT_NULL);
if (result != RT_EOK)
{
return result;
}
return rt_device_init(&mcxc162_rtc.parent);
}
INIT_DEVICE_EXPORT(rt_hw_rtc_init);
#endif /* BSP_USING_RTC */
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