From e0c24325034244a89f608459cc6ace09c142fcf1 Mon Sep 17 00:00:00 2001
From: Damien George <damien.p.george@gmail.com>
Date: Mon, 10 Dec 2018 10:58:08 +1100
Subject: [PATCH] stm32/uart: Simplify deinit of UART, no need to call HAL.

The HAL just clears UE and then clears all the UART control registers.
---
 ports/stm32/uart.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/ports/stm32/uart.c b/ports/stm32/uart.c
index 061738181b..4882ebafb7 100644
--- a/ports/stm32/uart.c
+++ b/ports/stm32/uart.c
@@ -332,10 +332,10 @@ void uart_set_rxbuf(pyb_uart_obj_t *self, size_t len, void *buf) {
 void uart_deinit(pyb_uart_obj_t *self) {
     self->is_enabled = false;
 
-    UART_HandleTypeDef huart;
-    huart.Instance = self->uartx;
-    HAL_UART_DeInit(&huart);
+    // Disable UART
+    self->uartx->CR1 &= ~USART_CR1_UE;
 
+    // Reset and turn off the UART peripheral
     if (self->uart_id == 1) {
         HAL_NVIC_DisableIRQ(USART1_IRQn);
         __HAL_RCC_USART1_FORCE_RESET();