stm32: disable HSI48 if not in use

1 files changed, 6 insertions, 0 deletions

diff --git a/embassy-stm32/src/rcc/g4.rs b/embassy-stm32/src/rcc/g4.rs
index da13e16aa..0dd3713c8 100644
--- a/embassy-stm32/src/rcc/g4.rs
+++ b/embassy-stm32/src/rcc/g4.rs
@@ -300,6 +300,12 @@ pub(crate) unsafe fn init(config: Config) {
         RCC.cr().modify(|w| w.set_hsion(false));
     }
 
+    // Disable the HSI48, if not used
+    #[cfg(crs)]
+    if config.hsi48.is_none() {
+        super::disable_hsi48();
+    }
+
     if config.low_power_run {
         assert!(sys <= Hertz(2_000_000));
         PWR.cr1().modify(|w| w.set_lpr(true));