[components][rtc] Add RTC framework V2.0 to simplify RTC registration process

components/drivers/include/drivers/rtc.h

@@ -11,6 +11,9 @@
 #ifndef __RTC_H__
 #define __RTC_H__
 
+#include <rtconfig.h>
+#include <drivers/rtc_core.h>
+
 rt_err_t set_date(rt_uint32_t year, rt_uint32_t month, rt_uint32_t day);
 rt_err_t set_time(rt_uint32_t hour, rt_uint32_t minute, rt_uint32_t second);
 

components/drivers/include/drivers/rtc_core.h

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-06-11     iysheng      first version.
+ */
+
+#ifndef __RTC_CORE_H__
+#define __RTC_CORE_H__
+
+#include <rtthread.h>
+
+#define RT_DEVICE_CTRL_RTC_GET_TIME     0x10            /**< get second time */
+#define RT_DEVICE_CTRL_RTC_SET_TIME     0x11            /**< set second time */
+#define RT_DEVICE_CTRL_RTC_GET_TIME_US  0x12            /**< get microsecond time */
+#define RT_DEVICE_CTRL_RTC_SET_TIME_US  0x13            /**< set microsecond time */
+#define RT_DEVICE_CTRL_RTC_GET_ALARM    0x14            /**< get alarm */
+#define RT_DEVICE_CTRL_RTC_SET_ALARM    0x15            /**< set alarm */
+
+struct rt_rtc_ops
+{
+    rt_err_t (*init)(void);
+    rt_err_t (*get_secs)(void *arg);
+    rt_err_t (*set_secs)(void *arg);
+    rt_err_t (*get_alarm)(void *arg);
+    rt_err_t (*set_alarm)(void *arg);
+};
+
+typedef struct rt_rtc_device
+{
+    struct rt_device parent;
+    const struct rt_rtc_ops *ops;
+} rt_rtc_dev_t;
+
+rt_err_t rt_rtc_dev_register(rt_rtc_dev_t *rtc,
+                            const char    *name,
+                            rt_uint32_t    flag,
+                            void          *data);
+
+#endif /* __RTC_CORE_H__ */

components/drivers/rtc/SConscript

@@ -13,7 +13,7 @@ CPPPATH = [cwd + '/../include']
 group = []
 
 if GetDepend(['RT_USING_RTC']):
-    src = src + rtc
+    src = src + ['rtc.c', 'rtc_core.c']
     if GetDepend(['RT_USING_ALARM']): 
         src = src + rtc_alarm
     if GetDepend(['RT_USING_SOFT_RTC']): 
@@ -21,4 +21,4 @@ if GetDepend(['RT_USING_RTC']):
 
 group = DefineGroup('DeviceDrivers', src, depend = ['RT_USING_RTC'], CPPPATH = CPPPATH)
 
-Return('group')
+Return('group')

components/drivers/rtc/rtc.c

@@ -14,6 +14,7 @@
 #include <sys/time.h>
 #include <string.h>
 #include <rtthread.h>
+#include <drivers/rtc.h>
 
 #ifdef RT_USING_RTC
 

components/drivers/rtc/rtc_core.c

@@ -0,0 +1,117 @@
+/*
+ * COPYRIGHT (C) 2011-2021, Real-Thread Information Technology Ltd
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-06-11     iysheng      first version.
+ */
+
+#include <drivers/rtc_core.h>
+
+#define TRY_DO_RTC_FUNC(rt_rtc_dev, func_name, args) \
+    rt_rtc_dev->ops->func_name ?  rt_rtc_dev->ops->func_name(args) : -RT_EINVAL;
+
+/*
+ * This function initializes rtc_core
+ */
+static rt_err_t rt_rtc_core_init(struct rt_device *dev)
+{
+    rt_rtc_dev_t *rtc_core;
+
+    RT_ASSERT(dev != RT_NULL);
+    rtc_core = (rt_rtc_dev_t *)dev;
+    if (rtc_core->ops->init)
+    {
+        return (rtc_core->ops->init());
+    }
+
+    return (-RT_ENOSYS);
+}
+
+static rt_err_t rt_rtc_core_open(struct rt_device *dev, rt_uint16_t oflag)
+{
+    return (RT_EOK);
+}
+
+static rt_err_t rt_rtc_core_close(struct rt_device *dev)
+{
+    /* Add close member function in rt_rtc_ops when need,
+     * then call that function here.
+     * */
+    return (RT_EOK);
+}
+
+static rt_err_t rt_rtc_core_control(struct rt_device *dev,
+                                    int              cmd,
+                                    void             *args)
+{
+    rt_rtc_dev_t *rtc_core;
+    rt_err_t ret = -RT_EINVAL;
+
+    RT_ASSERT(dev != RT_NULL);
+    rtc_core = (rt_rtc_dev_t *)dev;
+
+    switch (cmd)
+    {
+        case RT_DEVICE_CTRL_RTC_GET_TIME:
+            ret = TRY_DO_RTC_FUNC(rtc_core, get_secs, args);
+            break;
+        case RT_DEVICE_CTRL_RTC_SET_TIME:
+            ret = TRY_DO_RTC_FUNC(rtc_core, set_secs, args);
+            break;
+        case RT_DEVICE_CTRL_RTC_GET_ALARM:
+            ret = TRY_DO_RTC_FUNC(rtc_core, get_alarm, args);
+            break;
+        case RT_DEVICE_CTRL_RTC_SET_ALARM:
+            ret = TRY_DO_RTC_FUNC(rtc_core, set_alarm, args);
+            break;
+        default:
+            break;
+    }
+
+    return ret;
+}
+#ifdef RT_USING_DEVICE_OPS
+const static struct rt_device_ops rtc_core_ops =
+{
+    rt_rtc_core_init,
+    rt_rtc_core_open,
+    rt_rtc_core_close,
+    RT_NULL,
+    RT_NULL,
+    rt_rtc_core_control,
+};
+#endif
+
+rt_err_t rt_rtc_dev_register(rt_rtc_dev_t *rtc,
+                            const char    *name,
+                            rt_uint32_t    flag,
+                            void          *data)
+{
+    struct rt_device *device;
+    RT_ASSERT(rtc != RT_NULL);
+
+    device = &(rtc->parent);
+
+    device->type        = RT_Device_Class_RTC;
+    device->rx_indicate = RT_NULL;
+    device->tx_complete = RT_NULL;
+
+#ifdef RT_USING_DEVICE_OPS
+    device->ops         = &rtc_core_ops;
+#else
+    device->init        = rt_rtc_core_init;
+    device->open        = rt_rtc_core_open;
+    device->close       = rt_rtc_core_close;
+    device->read        = RT_NULL;
+    device->write       = RT_NULL;
+    device->control     = rt_rtc_core_control;
+#endif
+    device->user_data   = data;
+
+    /* register a character device */
+    return rt_device_register(device, name, flag);
+}
+

components/libc/compilers/common/time.c

@@ -473,12 +473,17 @@ static int clock_time_system_init()
     rt_device_t device;
 
     time = 0;
+
+#ifdef RT_USING_RTC
     device = rt_device_find("rtc");
     if (device != RT_NULL)
     {
         /* get realtime seconds */
         rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &time);
     }
+#else
+    LOG_W("Cannot find a RTC device to provide time!");
+#endif
 
     /* get tick */
     tick = rt_tick_get();
@@ -591,6 +596,7 @@ int clock_settime(clockid_t clockid, const struct timespec *tp)
     _timevalue.tv_usec = MICROSECOND_PER_SECOND - (tick % RT_TICK_PER_SECOND) * MICROSECOND_PER_TICK;
     _timevalue.tv_sec = second - tick/RT_TICK_PER_SECOND - 1;
 
+#ifdef RT_USING_RTC
     /* update for RTC device */
     device = rt_device_find("rtc");
     if (device != RT_NULL)
@@ -599,6 +605,9 @@ int clock_settime(clockid_t clockid, const struct timespec *tp)
         rt_device_control(device, RT_DEVICE_CTRL_RTC_SET_TIME, &second);
     }
     else
+#else
+    LOG_W("Cannot find a RTC device to save time!");
+#endif
         return -1;
 
     return 0;

include/rtdef.h

@@ -962,12 +962,6 @@ enum rt_device_class_type
 #define RT_DEVICE_CTRL_BLK_AUTOREFRESH  0x13            /**< block device : enter/exit auto refresh mode */
 #define RT_DEVICE_CTRL_NETIF_GETMAC     0x10            /**< get mac address */
 #define RT_DEVICE_CTRL_MTD_FORMAT       0x10            /**< format a MTD device */
-#define RT_DEVICE_CTRL_RTC_GET_TIME     0x10            /**< get second time */
-#define RT_DEVICE_CTRL_RTC_SET_TIME     0x11            /**< set second time */
-#define RT_DEVICE_CTRL_RTC_GET_TIME_US  0x12            /**< get microsecond time */
-#define RT_DEVICE_CTRL_RTC_SET_TIME_US  0x13            /**< set microsecond time */
-#define RT_DEVICE_CTRL_RTC_GET_ALARM    0x14            /**< get alarm */
-#define RT_DEVICE_CTRL_RTC_SET_ALARM    0x15            /**< set alarm */
 
 typedef struct rt_device *rt_device_t;