Introduce more peripheral free methods for consistency

hal/src/peripherals/nvm/mod.rs

@@ -176,6 +176,12 @@ impl Nvm {
         Self { nvm }
     }
 
+    /// Releases the NvmCtrl resource
+    #[inline]
+    pub fn free(self) -> Nvmctrl {
+        self.nvm
+    }
+
     /// Raw access to the registers.
     ///
     /// # Safety

hal/src/peripherals/pwm/d11.rs

@@ -57,6 +57,15 @@ impl $TYPE {
         }
     }
 
+    #[inline]
+    // Disables the TC, then releases it
+    pub fn free(self) -> crate::pac::$TC {
+        let count = self.tc.count16();
+        count.ctrla().write(|w| w.swrst().set_bit());
+        while count.ctrla().read().bits() & 1 != 0 {}
+        self.tc
+    }
+
     pub fn set_period(&mut self, period: Hertz)
     {
         let params = TimerParams::new(period, self.clock_freq);

hal/src/peripherals/pwm/d5x.rs

@@ -606,6 +606,14 @@ impl<I: PinId, M: PinMode> $TYPE<I, M> {
             pinout,
         }
     }
+
+    #[inline]
+    // Disables the TCC, then releases it
+    pub fn free(self) -> crate::pac::$TCC {
+        self.tcc.ctrla().write(|w| w.swrst().set_bit());
+        while self.tcc.syncbusy().read().swrst().bit_is_set() {}
+        self.tcc
+    }
 }
 
 impl<I: PinId, M: PinMode> $crate::ehal_02::Pwm for $TYPE<I, M> {

hal/src/peripherals/timer/d11.rs

@@ -129,6 +129,15 @@ impl TimerCounter<$TC>
             tc,
         }
     }
+
+    #[inline]
+    // Disables the TC, then releases it
+    pub fn free(self) -> $TC {
+        let count = self.tc.count16();
+        count.ctrla().write(|w| w.swrst().set_bit());
+        while count.ctrla().read().bits() & 1 != 0 {}
+        self.tc
+    }
 }
         )+
     }

hal/src/peripherals/timer/d5x.rs

@@ -128,6 +128,15 @@ impl TimerCounter<$TC>
             tc,
         }
     }
+
+    #[inline]
+    // Disables the TC, then releases it
+    pub fn free(self) -> $TC {
+        let count = self.tc.count_16();
+        count.ctrla().write(|w| w.swrst().set_bit());
+        while count.syncbusy().read().swrst().bit_is_set() {}
+        self.tc
+    }
 }
         )+
     }

hal/src/peripherals/trng.rs

@@ -13,6 +13,11 @@ impl Trng {
         Self(trng)
     }
 
+    /// Releases the Trng resource
+    pub fn free(self) -> pac::Trng {
+        self.0
+    }
+
     pub fn random(&self, buf: &mut [u8]) {
         for chunk in buf.chunks_mut(4) {
             chunk.copy_from_slice(&self.random_u32().to_le_bytes()[..chunk.len()]);