From 466e1ee9eff2a40f562b0f970e3afcdeac017cfb Mon Sep 17 00:00:00 2001
From: Tobias Naumann <tobias.naumann@iml.fraunhofer.de>
Date: Fri, 16 May 2025 13:05:35 +0200
Subject: [PATCH] Impl Drop for stm32 Rng

---
 embassy-stm32/src/rng.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/embassy-stm32/src/rng.rs b/embassy-stm32/src/rng.rs
index 250a08a39..8fa1b3a9d 100644
--- a/embassy-stm32/src/rng.rs
+++ b/embassy-stm32/src/rng.rs
@@ -186,6 +186,15 @@ impl<'d, T: Instance> Rng<'d, T> {
     }
 }
 
+impl<'d, T: Instance> Drop for Rng<'d, T> {
+    fn drop(&mut self) {
+        T::regs().cr().modify(|reg| {
+            reg.set_rngen(false);
+        });
+        rcc::disable::<T>();
+    }
+}
+
 impl<'d, T: Instance> RngCore for Rng<'d, T> {
     fn next_u32(&mut self) -> u32 {
         loop {