From b1c3c2813e45bf8d8d05009ce24800ac6907e2c8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 4 Apr 2019 10:10:22 +0200
Subject: [PATCH] [ion] ExternalFlash: reset QUADSPI peripheral

---
 ion/src/device/shared/drivers/external_flash.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/ion/src/device/shared/drivers/external_flash.cpp b/ion/src/device/shared/drivers/external_flash.cpp
index 4eb3129d2..2de53139d 100644
--- a/ion/src/device/shared/drivers/external_flash.cpp
+++ b/ion/src/device/shared/drivers/external_flash.cpp
@@ -263,7 +263,10 @@ static void initGPIO() {
 static void initQSPI() {
   // Enable QUADSPI AHB3 peripheral clock
   RCC.AHB3ENR()->setQSPIEN(true);
-  // Configure controller for target device
+  /* Reset QSPI peripheral */
+  RCC.AHB3RSTR()->setQSPIRST(true);
+  RCC.AHB3RSTR()->setQSPIRST(false);
+ // Configure controller for target device
   class QUADSPI::DCR dcr(0);
   dcr.setFSIZE(NumberOfAddressBitsInChip - 1);
   /* According to the device's datasheet (see Sections 8.7 and 8.8), the CS