From dce37d0b4bac81c2a47e14ddf752a3c4185bfcac Mon Sep 17 00:00:00 2001
From: LinJieqiang <qiang517503838@gmail.com>
Date: Wed, 4 Sep 2019 10:08:34 +0800
Subject: [PATCH] bsp: fix stm32 rtc hal library error.

---
 bsp/stm32/libraries/HAL_Drivers/drv_rtc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/bsp/stm32/libraries/HAL_Drivers/drv_rtc.c b/bsp/stm32/libraries/HAL_Drivers/drv_rtc.c
index 15544cb92..4a302a653 100644
--- a/bsp/stm32/libraries/HAL_Drivers/drv_rtc.c
+++ b/bsp/stm32/libraries/HAL_Drivers/drv_rtc.c
@@ -110,6 +110,9 @@ static rt_err_t rt_rtc_config(struct rt_device *dev)
 #endif
     HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);
 
+    /* Enable RTC Clock */
+    __HAL_RCC_RTC_ENABLE();
+
     RTC_Handler.Instance = RTC;
     if (HAL_RTCEx_BKUPRead(&RTC_Handler, RTC_BKP_DR1) != BKUP_REG_DATA)
     {
-- 
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