From 01c53ca4fbbabfd8e12af1ff6e5816ede5b6b7cd Mon Sep 17 00:00:00 2001
From: Raphael Coeffic <raphaelcoeffic@users.noreply.github.com>
Date: Sun, 11 Jan 2026 00:30:52 +0100
Subject: [PATCH] fix(f4): re-enable pre-fetch, instruction and data cache
 (#6979)

---
 radio/src/targets/common/arm/stm32/f4/system_clock.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/radio/src/targets/common/arm/stm32/f4/system_clock.c b/radio/src/targets/common/arm/stm32/f4/system_clock.c
index faa5e7c29..60f89b461 100644
--- a/radio/src/targets/common/arm/stm32/f4/system_clock.c
+++ b/radio/src/targets/common/arm/stm32/f4/system_clock.c
@@ -58,6 +58,11 @@ void SystemClock_Config(void)
   /* Set FLASH latency */
   LL_FLASH_SetLatency(LL_FLASH_LATENCY_5);
 
+  /* Setup pre-fetch + caches */
+  LL_FLASH_EnablePrefetch();
+  LL_FLASH_EnableInstCache();
+  LL_FLASH_EnableDataCache();
+
   /* Enable PWR clock */
   LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);