stm32: disable HSI48 if not in use

1 files changed, 6 insertions, 0 deletions

diff --git a/embassy-stm32/src/rcc/h.rs b/embassy-stm32/src/rcc/h.rs
index 485edd390..2fe2a435c 100644
--- a/embassy-stm32/src/rcc/h.rs
+++ b/embassy-stm32/src/rcc/h.rs
@@ -671,6 +671,12 @@ 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();
+    }
+
     // IO compensation cell - Requires CSI clock and SYSCFG
     #[cfg(any(stm32h7))] // TODO h5, h7rs
     if csi.is_some() {