From b8679c0cc85e5eb65bd996ee18deac4a952b1b10 Mon Sep 17 00:00:00 2001
From: Dario Nieuwenhuis <dirbaio@dirbaio.net>
Date: Mon, 6 Nov 2023 03:37:39 +0100
Subject: [PATCH] stm32/rcc: set highest VOS on some F4s with no overdrive.

---
 embassy-stm32/src/rcc/f4f7.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/embassy-stm32/src/rcc/f4f7.rs b/embassy-stm32/src/rcc/f4f7.rs
index 2e4f9572..d507a6fd 100644
--- a/embassy-stm32/src/rcc/f4f7.rs
+++ b/embassy-stm32/src/rcc/f4f7.rs
@@ -113,6 +113,14 @@ pub(crate) unsafe fn init(config: Config) {
         while !PWR.csr1().read().odswrdy() {}
     }
 
+    #[cfg(any(stm32f401, stm32f410, stm32f411, stm32f412, stm32f413, stm32f423))]
+    {
+        use crate::pac::pwr::vals::Vos;
+        use crate::pac::PWR;
+
+        PWR.cr1().modify(|w| w.set_vos(Vos::SCALE1));
+    }
+
     // Configure HSI
     let hsi = match config.hsi {
         false => {