wpan: allow setting Rfwkpsel

2 files changed, 11 insertions, 6 deletions

diff --git a/embassy-stm32/src/ipcc.rs b/embassy-stm32/src/ipcc.rs
index 183986fdc..fc0f3491e 100644
--- a/embassy-stm32/src/ipcc.rs
+++ b/embassy-stm32/src/ipcc.rs
@@ -10,6 +10,7 @@ use embassy_sync::waitqueue::AtomicWaker;
 
 use crate::interrupt::typelevel::Interrupt;
 use crate::peripherals::IPCC;
+use crate::rcc::SealedRccPeripheral;
 use crate::{interrupt, rcc};
 
 /// Interrupt handler.
@@ -223,11 +224,8 @@ impl Ipcc {
         rcc::enable_and_reset::<IPCC>();
         IPCC::set_cpu2(true);
 
-        #[cfg(stm32wb)]
-        // DO NOT REMOVE THIS UNLESS YOU FIX THE EXAMPLES AND TEST FIRST
-        crate::pac::RCC
-            .csr()
-            .modify(|w| w.set_rfwkpsel(stm32_metapac::rcc::vals::Rfwkpsel::LSE));
+        // Verify rfwkpsel is set
+        let _ = IPCC::frequency();
 
         let regs = IPCC::regs();
 
diff --git a/embassy-stm32/src/rcc/l.rs b/embassy-stm32/src/rcc/l.rs
index 2e1cbd702..0d668103c 100644
--- a/embassy-stm32/src/rcc/l.rs
+++ b/embassy-stm32/src/rcc/l.rs
@@ -135,7 +135,14 @@ pub const WPAN_DEFAULT: Config = Config {
     apb1_pre: APBPrescaler::DIV1,
     apb2_pre: APBPrescaler::DIV1,
 
-    mux: super::mux::ClockMux::default(),
+    mux: {
+        use crate::pac::rcc::vals::Rfwkpsel;
+
+        let mut mux = super::mux::ClockMux::default();
+
+        mux.rfwkpsel = Rfwkpsel::LSE;
+        mux
+    },
 };
 
 fn msi_enable(range: MSIRange) {