[dm][rtc] support DM API for RTC

1. rtc_dev_set_name for RTC device init the name auto.
2. rtc_wkalarm_to_timestamp and rtc_timestamp_to_wkalarm for
   rt_rtc_wkalarm/time_t convert.

Signed-off-by: GuEe-GUI <[email protected]>

Author: GuEe-GUI

components/drivers/rtc/SConscript

@@ -13,6 +13,9 @@ if GetDepend(['RT_USING_RTC']):
     if GetDepend(['RT_USING_SOFT_RTC']):
         src = src + ['dev_soft_rtc.c']
 
+if GetDepend(['RT_USING_DM']):
+    src += ['rtc_dm.c']
+
 group = DefineGroup('DeviceDrivers', src, depend = ['RT_USING_RTC'], CPPPATH = CPPPATH)
 
 Return('group')

components/drivers/rtc/rtc_dm.c

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2006-2022, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-12-06     GuEe-GUI     first version
+ */
+
+#include <rtatomic.h>
+#include "rtc_dm.h"
+
+#define DBG_TAG "rtc.dm"
+#define DBG_LVL DBG_INFO
+#include <rtdbg.h>
+
+int rtc_dev_set_name(struct rt_device *rtc_dev)
+{
+    int id;
+    static volatile rt_atomic_t uid = 1;
+
+    RT_ASSERT(rtc_dev != RT_NULL)
+
+    if (rt_device_find("rtc"))
+    {
+        id = (int)rt_atomic_add(&uid, 1);
+
+        return rt_dm_dev_set_name(rtc_dev, "rtc%u", id);
+    }
+    else
+    {
+        return rt_dm_dev_set_name(rtc_dev, "rtc");
+    }
+}
+
+time_t rtc_wkalarm_to_timestamp(struct rt_rtc_wkalarm *alarm)
+{
+    struct tm tm_time;
+    time_t current_time;
+
+    current_time = time(RT_NULL);
+    localtime_r(&current_time, &tm_time);
+
+    tm_time.tm_sec = alarm->tm_sec;
+    tm_time.tm_min = alarm->tm_min;
+    tm_time.tm_hour = alarm->tm_hour;
+
+    return timegm(&tm_time);
+}
+
+void rtc_timestamp_to_wkalarm(time_t timestamp, struct rt_rtc_wkalarm *alarm)
+{
+    struct tm tm_time;
+
+    localtime_r(&timestamp, &tm_time);
+
+    alarm->tm_sec = tm_time.tm_sec;
+    alarm->tm_min = tm_time.tm_min;
+    alarm->tm_hour = tm_time.tm_hour;
+}

components/drivers/rtc/rtc_dm.h

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2006-2022, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-12-06     GuEe-GUI     first version
+ */
+
+#ifndef __RTC_DM_H__
+#define __RTC_DM_H__
+
+#include <rthw.h>
+#include <rtthread.h>
+#include <rtdevice.h>
+
+#include <sys/time.h>
+
+int rtc_dev_set_name(struct rt_device *rtc_dev);
+time_t rtc_wkalarm_to_timestamp(struct rt_rtc_wkalarm *alarm);
+void rtc_timestamp_to_wkalarm(time_t timestamp, struct rt_rtc_wkalarm *alarm);
+
+#endif /* __RTC_DM_H__ */