diff --git a/CHANGELOG.md b/CHANGELOG.md
index c63bf3b0..399b2eb3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,7 +15,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
   Add `RInto` trait and `Rmp` peripheral wrapper, add `remap` for peripherals. [#514] [#520]
   Remove `RemapStruct`s. [#462] [#506] [#509]
 - Use independent `Spi` and `SpiSlave` structures instead of `OP` generic [#462]
-- Include `Clocks` in `Rcc`. Take `&mut Rcc/RCC` where possible [#498] [#536]
+- Include `Clocks` in `Rcc`. Take `&mut Rcc/RCC` where possible, `freeze` takes `Config` or `RawConfig` [#498] [#536]
 - Update to `stm32f1` v0.16.0 [#503] [#534]
 - `Spi` now takes `Option<PIN>` for `SCK`, `MISO`, `MOSI` [#514],
   add `SPIx::NoSck`, etc. [#537]
diff --git a/examples/adc_temperature.rs b/examples/adc_temperature.rs
index 7465e409..2bdc28df 100644
--- a/examples/adc_temperature.rs
+++ b/examples/adc_temperature.rs
@@ -24,7 +24,7 @@ fn main() -> ! {
 
     /*
     // Alternative configuration using dividers and multipliers directly
-    let rcc = p.RCC.freeze_raw(
+    let rcc = p.RCC.freeze(
         rcc::RawConfig {
             hse: Some(8_000_000),
             pllmul: Some(7),
diff --git a/src/rcc.rs b/src/rcc.rs
index 32ebc691..0e3c3b09 100644
--- a/src/rcc.rs
+++ b/src/rcc.rs
@@ -22,10 +22,7 @@ pub trait RccExt {
     fn constrain(self) -> Rcc;
 
     /// Constrains the `RCC` peripheral and apply clock configuration
-    fn freeze(self, rcc_cfg: Config, acr: &mut ACR) -> Rcc;
-
-    /// Constrains the `RCC` peripheral and apply clock configuration
-    fn freeze_raw(self, rcc_cfg: RawConfig, acr: &mut ACR) -> Rcc;
+    fn freeze(self, rcc_cfg: impl Into<RawConfig>, acr: &mut ACR) -> Rcc;
 }
 
 impl RccExt for RCC {
@@ -36,13 +33,9 @@ impl RccExt for RCC {
         }
     }
 
-    fn freeze(self, rcc_cfg: Config, acr: &mut ACR) -> Rcc {
+    fn freeze(self, rcc_cfg: impl Into<RawConfig>, acr: &mut ACR) -> Rcc {
         self.constrain().freeze(rcc_cfg, acr)
     }
-
-    fn freeze_raw(self, rcc_cfg: RawConfig, acr: &mut ACR) -> Rcc {
-        self.constrain().freeze_raw(rcc_cfg, acr)
-    }
 }
 
 /// Constrained RCC peripheral
@@ -214,13 +207,8 @@ impl Rcc {
     /// let clocks = rcc.cfgr.freeze(&mut flash.acr);
     /// ```
     #[inline(always)]
-    pub fn freeze(self, config: Config, acr: &mut ACR) -> Self {
-        let cfg = RawConfig::from_cfgr(config);
-        self.freeze_raw(cfg, acr)
-    }
-
-    #[inline(always)]
-    pub fn freeze_raw(self, cfg: RawConfig, acr: &mut ACR) -> Self {
+    pub fn freeze(self, cfg: impl Into<RawConfig>, acr: &mut ACR) -> Self {
+        let cfg = cfg.into();
         let clocks = cfg.get_clocks();
         // adjust flash wait states
         #[cfg(any(feature = "stm32f103", feature = "connectivity"))]
@@ -631,6 +619,13 @@ pub type UsbPre = rcc::cfgr::USBPRE;
 pub type UsbPre = rcc::cfgr::OTGFSPRE;
 pub type AdcPre = rcc::cfgr::ADCPRE;
 
+impl From<Config> for RawConfig {
+    #[inline(always)]
+    fn from(cfgr: Config) -> Self {
+        Self::from_cfgr(cfgr)
+    }
+}
+
 impl RawConfig {
     pub const fn from_cfgr(cfgr: Config) -> Self {
         let hse = cfgr.hse;