From 00b903fa75756669fa448ee39d5253ccd2cc45b4 Mon Sep 17 00:00:00 2001
From: Giovanni Di Sirio <gdisirio@gmail.com>
Date: Fri, 23 Apr 2021 15:35:50 +0000
Subject: [PATCH] Fixed bug #1113 (again).

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@14272 27425a3e-05d8-49a3-a47f-9c15f0e5edd8
---
 os/hal/ports/STM32/STM32H7xx/stm32_rcc.h | 23 +++++++++++++++++++++++
 readme.txt                               |  2 ++
 2 files changed, 25 insertions(+)

diff --git a/os/hal/ports/STM32/STM32H7xx/stm32_rcc.h b/os/hal/ports/STM32/STM32H7xx/stm32_rcc.h
index 221684603..1b78dbb80 100644
--- a/os/hal/ports/STM32/STM32H7xx/stm32_rcc.h
+++ b/os/hal/ports/STM32/STM32H7xx/stm32_rcc.h
@@ -1771,6 +1771,29 @@
  * @api
  */
 #define rccResetUART8() rccResetAPB1L(RCC_APB1LRSTR_UART8RST)
+
+/**
+ * @brief   Enables the LPUART1 peripheral clock.
+ *
+ * @param[in] lp        low power enable flag
+ *
+ * @api
+ */
+#define rccEnableLPUART1(lp) rccEnableAPB4(RCC_APB4ENR_LPUART1EN, lp)
+
+/**
+ * @brief   Disables the LPUART1 peripheral clock.
+ *
+ * @api
+ */
+#define rccDisableLPUART1() rccDisableAPB4(RCC_APB4ENR_LPUART1EN)
+
+/**
+ * @brief   Resets the LPUART1 peripheral.
+ *
+ * @api
+ */
+#define rccResetLPUART1() rccResetAPB4(RCC_APB4RSTR_LPUART1RST)
 /** @} */
 
 /**
diff --git a/readme.txt b/readme.txt
index b18ffdc40..69c11b346 100644
--- a/readme.txt
+++ b/readme.txt
@@ -130,6 +130,8 @@
        MEMS Accelerometers.
 - NEW: Safer messages mechanism for sandboxes (to be backported to 20.3.1).
 - NEW: Added latency measurement test application.
+- FIX: Fixed (again) LPUART1 support for STM32H7xx (bug #1113)
+       (backported to 20.3.4).
 - FIX: Fixed wrong errors handling in STM32 ADC drivers (bug #1152).
 - FIX: Fixed wrong behavior in Serial-USB driver (bug #1151)
        (backported to 20.3.4)(backported to 19.1.5).