[STM all] Fix #1480: change location of check for RTC already initialised

Need to keep PWR_CLK_ENABLE and LSE LSI oscillator configuration.
Just skip the HAL_RTC_Init in case INITS flag is already set.

Author: adustm

libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F0/rtc_api.c

@@ -45,9 +45,6 @@ void rtc_init(void) {
     rtc_inited = 1;
 
     RtcHandle.Instance = RTC;
-	
-    // Check if RTC is already initialized
-    if ((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) return;
 
     // Enable Power clock
     __PWR_CLK_ENABLE();
@@ -82,6 +79,9 @@ void rtc_init(void) {
         rtc_freq = LSI_VALUE;
     }
 
+    // Check if RTC is already initialized
+    if ((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) return;
+
     // Enable RTC
     __HAL_RCC_RTC_ENABLE();
 

libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F3/rtc_api.c

@@ -46,9 +46,6 @@ void rtc_init(void)
     rtc_inited = 1;
 
     RtcHandle.Instance = RTC;
-	
-    // Check if RTC is already initialized
-    if ((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) return;
 
     // Enable Power clock
     __PWR_CLK_ENABLE();
@@ -83,6 +80,9 @@ void rtc_init(void)
         rtc_freq = LSI_VALUE;
     }
 
+    // Check if RTC is already initialized
+    if ((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) return;
+
     // Enable RTC
     __HAL_RCC_RTC_ENABLE();
 

libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F4/rtc_api.c

@@ -46,9 +46,6 @@ void rtc_init(void)
     rtc_inited = 1;
 
     RtcHandle.Instance = RTC;
-	
-    // Check if RTC is already initialized
-    if ((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) return;
 
     // Enable Power clock
     __PWR_CLK_ENABLE();
@@ -85,6 +82,9 @@ void rtc_init(void)
         rtc_freq = LSI_VALUE;
     }
 
+    // Check if RTC is already initialized
+    if ((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) return;
+
     // Enable RTC
     __HAL_RCC_RTC_ENABLE();
 

libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F7/rtc_api.c

@@ -40,8 +40,6 @@ void rtc_init(void)
     RCC_OscInitTypeDef RCC_OscInitStruct;
     uint32_t rtc_freq = 0;
 
-    if((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) {     // RTC initialization and status register (RTC_ISR), cold start (with no backup domain power) RTC reset value
-
         RtcHandle.Instance = RTC;
 
         // Enable Power clock
@@ -79,6 +77,8 @@ void rtc_init(void)
             rtc_freq = LSI_VALUE;
         }
 
+    if((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) {     // RTC initialization and status register (RTC_ISR), cold start (with no backup domain power) RTC reset value
+
         // Enable RTC
         __HAL_RCC_RTC_ENABLE();
 

libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32L0/TARGET_DISCO_L053C8/rtc_api.c

@@ -54,9 +54,6 @@ void rtc_init(void)
     rtc_inited = 1;
 
     RtcHandle.Instance = RTC;
-	
-    // Check if RTC is already initialized
-    if ((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) return;
 
     // Enable Power clock
     __PWR_CLK_ENABLE();
@@ -97,6 +94,9 @@ void rtc_init(void)
     }
 #endif
 
+    // Check if RTC is already initialized
+    if ((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) return;
+
     // Enable RTC
     __HAL_RCC_RTC_ENABLE();
 

libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L053R8/rtc_api.c

@@ -46,9 +46,6 @@ void rtc_init(void)
     rtc_inited = 1;
 
     RtcHandle.Instance = RTC;
-	
-    // Check if RTC is already initialized
-    if ((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) return;
 
     // Enable Power clock
     __PWR_CLK_ENABLE();
@@ -85,6 +82,9 @@ void rtc_init(void)
         rtc_freq = 32000;
     }
 
+    // Check if RTC is already initialized
+    if ((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) return;
+
     // Enable RTC
     __HAL_RCC_RTC_ENABLE();
 

libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L073RZ/rtc_api.c

@@ -46,9 +46,6 @@ void rtc_init(void)
     rtc_inited = 1;
 
     RtcHandle.Instance = RTC;
-	
-    // Check if RTC is already initialized
-    if ((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) return;
 
     // Enable Power clock
     __PWR_CLK_ENABLE();
@@ -85,6 +82,9 @@ void rtc_init(void)
         rtc_freq = 32000;
     }
 
+    // Check if RTC is already initialized
+    if ((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) return;
+
     // Enable RTC
     __HAL_RCC_RTC_ENABLE();
 

libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32L1/rtc_api.c

@@ -46,9 +46,6 @@ void rtc_init(void)
     rtc_inited = 1;
 
     RtcHandle.Instance = RTC;
-	
-    // Check if RTC is already initialized
-    if ((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) return;
 
     // Enable Power clock
     __PWR_CLK_ENABLE();
@@ -85,6 +82,9 @@ void rtc_init(void)
         rtc_freq = 40000;
     }
 
+    // Check if RTC is already initialized
+    if ((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) return;
+
     // Enable RTC
     __HAL_RCC_RTC_ENABLE();
 

libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32L4/rtc_api.c

@@ -48,9 +48,6 @@ void rtc_init(void)
 
     RtcHandle.Instance = RTC;
 
-    // Check if RTC is already initialized
-    if ((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) return;
-
     // Enable Power clock
     __HAL_RCC_PWR_CLK_ENABLE();
 
@@ -91,6 +88,9 @@ void rtc_init(void)
         rtc_freq = 40000;
     }
 
+    // Check if RTC is already initialized
+    if ((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) return;
+
     // Enable RTC
     __HAL_RCC_RTC_ENABLE();