From 11e223850f5668edd91cbe44e800fdbdf21530f0 Mon Sep 17 00:00:00 2001
From: Pavol Rusnak <stick@gk2.sk>
Date: Thu, 28 Sep 2017 19:33:18 +0200
Subject: [PATCH] trezorhal: enable CSS (Clock Security System)

---
 embed/trezorhal/common.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/embed/trezorhal/common.c b/embed/trezorhal/common.c
index 1e219d929c..2983505b4d 100644
--- a/embed/trezorhal/common.c
+++ b/embed/trezorhal/common.c
@@ -43,6 +43,9 @@ void periph_init(void) {
     // Set the system clock to be HSE
     SystemClock_Config();
 
+    // Enable CSS (Clock Security System)
+    HAL_RCC_EnableCSS();
+
     // Enable GPIO clocks
     __HAL_RCC_GPIOA_CLK_ENABLE();
     __HAL_RCC_GPIOB_CLK_ENABLE();