From 57e00ef26236264bc54ad32442df5854aa0df27b Mon Sep 17 00:00:00 2001
From: Dave Hylands <dhylands@gmail.com>
Date: Sat, 7 Nov 2015 09:42:26 -0800
Subject: [PATCH] stmhal: Fix RTC code to work on the F7

---
 stmhal/rtc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/stmhal/rtc.c b/stmhal/rtc.c
index 65e8c526ed..561548ee49 100644
--- a/stmhal/rtc.c
+++ b/stmhal/rtc.c
@@ -211,7 +211,7 @@ void rtc_init(void) {
         if (rtc_use_lse) {
             // fall back to LSI...
             rtc_use_lse = false;
-            PWR->CR |= PWR_CR_DBP;
+            HAL_PWR_EnableBkUpAccess();
             RTCHandle.State = HAL_RTC_STATE_RESET;
             if (HAL_RTC_Init(&RTCHandle) != HAL_OK) {
                 rtc_info = 0x0100ffff; // indicate error