From 3d303b7930f13142bcfec5ec33c74e40d0e484cf Mon Sep 17 00:00:00 2001
From: Ayke van Laethem <aykevanlaethem@gmail.com>
Date: Sun, 23 Apr 2023 15:06:17 +0200
Subject: [PATCH] Disable UART before resetting

The UART causes in 1.25mA current consumption in sleep mode when left
enabled. That's a massive power drain! While the application could
disable the UART, it seems better to fix this directly in the
bootloader.
---
 src/boards.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/boards.c b/src/boards.c
index 7cd00141..215ae407 100644
--- a/src/boards.c
+++ b/src/boards.c
@@ -149,6 +149,9 @@ void board_teardown(void)
 
   // Stop LF clock
   NRF_CLOCK->TASKS_LFCLKSTOP = 1UL;
+
+  // Stop UART0
+  NRF_UART0->ENABLE = 0;
 }
 
 static uint32_t _systick_count = 0;