From 8e609e9459f8a9de92f7be8af4e5f46623ba50d0 Mon Sep 17 00:00:00 2001
From: Giovanni Di Sirio <gdisirio@gmail.com>
Date: Wed, 22 Jul 2020 09:17:06 +0000
Subject: [PATCH] Fixed bug #1114.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@13770 27425a3e-05d8-49a3-a47f-9c15f0e5edd8
---
 os/hal/ports/STM32/STM32H7xx/hal_lld.c | 12 ++++++++++--
 readme.txt                             |  2 ++
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/os/hal/ports/STM32/STM32H7xx/hal_lld.c b/os/hal/ports/STM32/STM32H7xx/hal_lld.c
index d40f21f4d..364786ae4 100644
--- a/os/hal/ports/STM32/STM32H7xx/hal_lld.c
+++ b/os/hal/ports/STM32/STM32H7xx/hal_lld.c
@@ -276,14 +276,22 @@ void stm32_clock_init(void) {
 #endif
   while ((RCC->CR & RCC_CR_HSERDY) == 0)
     ;                           /* Waits until HSE is stable.               */
-#endif
+#endif /* STM32_HSE_ENABLED == TRUE */
+
+  /* HSI48 activation.*/
+#if STM32_HSI48_ENABLED == TRUE
+  RCC->CR |= RCC_CR_HSI48ON;
+  while ((RCC->CR & RCC_CR_HSI48RDY) == 0)
+    ;                           /* Waits until HSI48 is stable.             */
+
+#endif /* STM32_HSI48_ENABLED == TRUE */
 
   /* CSI activation.*/
 #if STM32_CSI_ENABLED == TRUE
   RCC->CR |= RCC_CR_CSION;
   while ((RCC->CR & RCC_CR_CSIRDY) == 0)
     ;                           /* Waits until CSI is stable.               */
-#endif /* STM32_HSE_ENABLED == TRUE */
+#endif /* STM32_CSI_ENABLED == TRUE */
 
   /* LSI activation.*/
 #if STM32_LSI_ENABLED == TRUE
diff --git a/readme.txt b/readme.txt
index 32c2268e5..4997496c9 100644
--- a/readme.txt
+++ b/readme.txt
@@ -100,6 +100,8 @@
        MEMS Accelerometers.
 - NEW: Safer messages mechanism for sandboxes (to be backported to 20.3.1).
 - NEW: Added latency measurement test application.
+- FIX: Fixed HSI48 not getting enabled on STM32H7 (bug #1114)
+       (backported to 20.3.2).
 - FIX: Fixed LPUART1 support for STM32H7xx (bug #1113)
        (backported to 20.3.2).
 - FIX: Fixed wrong sector count in EFL driver for L4+ dual bank configuration