[libc] update ctime.c compatible with old drivers

RT-Thread · Nov 15, 2023 · c0e8ec1 · c0e8ec1
1 parent 6d7e393
commit c0e8ec1
Showing 1 changed file with 19 additions and 3 deletions.
diff --git a/components/libc/compilers/common/ctime.c b/components/libc/compilers/common/ctime.c
@@ -459,6 +459,7 @@ RTM_EXPORT(timegm);
 
 int gettimeofday(struct timeval *tv, struct timezone *tz)
 {
+    rt_err_t ret;
     /* The use of the timezone structure is obsolete;
      * the tz argument should normally be specified as NULL.
      * The tz_dsttime field has never been used under Linux.
@@ -478,9 +479,16 @@ int gettimeofday(struct timeval *tv, struct timezone *tz)
     {
         tv->tv_sec  = 0;
         tv->tv_usec = 0;
-
-        if (_control_rtc(RT_DEVICE_CTRL_RTC_GET_TIMEVAL, tv) == RT_EOK)
+        ret = _control_rtc(RT_DEVICE_CTRL_RTC_GET_TIMEVAL, tv);
+        if (ret == RT_EOK)
+        {
             return 0;
+        }
+        else if (ret == -RT_EINVAL) /* RT_DEVICE_CTRL_RTC_GET_TIMEVAL */
+        {
+            ret = _control_rtc(RT_DEVICE_CTRL_RTC_GET_TIME, (void *)&tv->tv_sec);
+        }
+        return 0;
     }
 
     rt_set_errno(EINVAL);
@@ -490,15 +498,23 @@ RTM_EXPORT(gettimeofday);
 
 int settimeofday(const struct timeval *tv, const struct timezone *tz)
 {
+    rt_err_t ret;
     /* The use of the timezone structure is obsolete;
      * the tz argument should normally be specified as NULL.
      * The tz_dsttime field has never been used under Linux.
      * Thus, the following is purely of historic interest.
      */
     if (tv != RT_NULL && (long)tv->tv_usec >= 0 && (long)tv->tv_sec >= 0)
     {
-        if (_control_rtc(RT_DEVICE_CTRL_RTC_SET_TIMEVAL, (void *)tv) == RT_EOK)
+        ret = _control_rtc(RT_DEVICE_CTRL_RTC_SET_TIMEVAL, (void *)tv);
+        if (ret == RT_EOK)
+        {
             return 0;
+        }
+        else if (ret == -RT_EINVAL) /* RT_DEVICE_CTRL_RTC_SET_TIME */
+        {
+            ret = _control_rtc(RT_DEVICE_CTRL_RTC_SET_TIME, (void *)&tv->tv_sec);
+        }
     }
 
     rt_set_errno(EINVAL);