diff --git a/embassy-nrf/src/buffered_uarte.rs b/embassy-nrf/src/buffered_uarte.rs
index 49e8dd2b6..b4ec70913 100644
--- a/embassy-nrf/src/buffered_uarte.rs
+++ b/embassy-nrf/src/buffered_uarte.rs
@@ -1,4 +1,5 @@
 use core::cmp::min;
+use core::marker::PhantomData;
 use core::mem;
 use core::pin::Pin;
 use core::sync::atomic::{compiler_fence, Ordering};
@@ -34,7 +35,7 @@ enum TxState {
 }
 
 struct State<'d, U: UarteInstance, T: TimerInstance> {
-    uarte: U,
+    phantom: PhantomData<&'d mut U>,
     timer: T,
     _ppi_ch1: Ppi<'d, AnyConfigurableChannel>,
     _ppi_ch2: Ppi<'d, AnyConfigurableChannel>,
@@ -63,7 +64,7 @@ pub struct BufferedUarte<'d, U: UarteInstance, T: TimerInstance> {
 impl<'d, U: UarteInstance, T: TimerInstance> BufferedUarte<'d, U, T> {
     /// unsafe: may not leak self or futures
     pub unsafe fn new(
-        uarte: impl Unborrow<Target = U> + 'd,
+        _uarte: impl Unborrow<Target = U> + 'd,
         timer: impl Unborrow<Target = T> + 'd,
         ppi_ch1: impl Unborrow<Target = impl ConfigurableChannel> + 'd,
         ppi_ch2: impl Unborrow<Target = impl ConfigurableChannel> + 'd,
@@ -76,7 +77,7 @@ impl<'d, U: UarteInstance, T: TimerInstance> BufferedUarte<'d, U, T> {
         rx_buffer: &'d mut [u8],
         tx_buffer: &'d mut [u8],
     ) -> Self {
-        unborrow!(uarte, timer, ppi_ch1, ppi_ch2, irq, rxd, txd, cts, rts);
+        unborrow!(timer, ppi_ch1, ppi_ch2, irq, rxd, txd, cts, rts);
 
         let r = U::regs();
         let rt = timer.regs();
@@ -158,7 +159,7 @@ impl<'d, U: UarteInstance, T: TimerInstance> BufferedUarte<'d, U, T> {
         BufferedUarte {
             inner: PeripheralMutex::new(
                 State {
-                    uarte,
+                    phantom: PhantomData,
                     timer,
                     _ppi_ch1: ppi_ch1,
                     _ppi_ch2: ppi_ch2,
diff --git a/embassy-nrf/src/pwm.rs b/embassy-nrf/src/pwm.rs
index da933cc80..8fc16a3ba 100644
--- a/embassy-nrf/src/pwm.rs
+++ b/embassy-nrf/src/pwm.rs
@@ -26,7 +26,6 @@ pub enum Prescaler {
 
 /// Interface to the UARTE peripheral
 pub struct Pwm<'d, T: Instance> {
-    peri: T,
     phantom: PhantomData<&'d mut T>,
 }
 
@@ -41,13 +40,13 @@ impl<'d, T: Instance> Pwm<'d, T> {
     /// or [`receive`](Pwm::receive).
     #[allow(unused_unsafe)]
     pub fn new(
-        pwm: impl Unborrow<Target = T> + 'd,
+        _pwm: impl Unborrow<Target = T> + 'd,
         ch0: impl Unborrow<Target = impl GpioOptionalPin> + 'd,
         ch1: impl Unborrow<Target = impl GpioOptionalPin> + 'd,
         ch2: impl Unborrow<Target = impl GpioOptionalPin> + 'd,
         ch3: impl Unborrow<Target = impl GpioOptionalPin> + 'd,
     ) -> Self {
-        unborrow!(pwm, ch0, ch1, ch2, ch3);
+        unborrow!(ch0, ch1, ch2, ch3);
 
         let r = T::regs();
         let s = T::state();
@@ -97,7 +96,6 @@ impl<'d, T: Instance> Pwm<'d, T> {
         r.loop_.write(|w| w.cnt().disabled());
 
         Self {
-            peri: pwm,
             phantom: PhantomData,
         }
     }
diff --git a/embassy-nrf/src/qspi.rs b/embassy-nrf/src/qspi.rs
index ea19ccf51..e5d21ceaf 100644
--- a/embassy-nrf/src/qspi.rs
+++ b/embassy-nrf/src/qspi.rs
@@ -55,14 +55,12 @@ impl Default for Config {
 }
 
 pub struct Qspi<'d, T: Instance> {
-    peri: T,
-    irq: T::Interrupt,
     phantom: PhantomData<&'d mut T>,
 }
 
 impl<'d, T: Instance> Qspi<'d, T> {
     pub fn new(
-        qspi: impl Unborrow<Target = T> + 'd,
+        _qspi: impl Unborrow<Target = T> + 'd,
         irq: impl Unborrow<Target = T::Interrupt> + 'd,
         sck: impl Unborrow<Target = impl GpioPin> + 'd,
         csn: impl Unborrow<Target = impl GpioPin> + 'd,
@@ -72,7 +70,7 @@ impl<'d, T: Instance> Qspi<'d, T> {
         io3: impl Unborrow<Target = impl GpioPin> + 'd,
         config: Config,
     ) -> Self {
-        unborrow!(qspi, irq, sck, csn, io0, io1, io2, io3);
+        unborrow!(irq, sck, csn, io0, io1, io2, io3);
 
         let r = T::regs();
 
@@ -139,8 +137,6 @@ impl<'d, T: Instance> Qspi<'d, T> {
         irq.enable();
 
         Self {
-            peri: qspi,
-            irq,
             phantom: PhantomData,
         }
     }
diff --git a/embassy-nrf/src/saadc.rs b/embassy-nrf/src/saadc.rs
index 448d0334c..33dab8d1a 100644
--- a/embassy-nrf/src/saadc.rs
+++ b/embassy-nrf/src/saadc.rs
@@ -32,8 +32,6 @@ pub enum Error {}
 
 /// One-shot saadc. Continuous sample mode TODO.
 pub struct OneShot<'d, T: PositivePin> {
-    peri: peripherals::SAADC,
-    positive_pin: T,
     irq: interrupt::SAADC,
     phantom: PhantomData<(&'d mut peripherals::SAADC, &'d mut T)>,
 }
@@ -71,12 +69,12 @@ impl Default for Config {
 
 impl<'d, T: PositivePin> OneShot<'d, T> {
     pub fn new(
-        saadc: impl Unborrow<Target = peripherals::SAADC> + 'd,
+        _saadc: impl Unborrow<Target = peripherals::SAADC> + 'd,
         irq: impl Unborrow<Target = interrupt::SAADC> + 'd,
         positive_pin: impl Unborrow<Target = T> + 'd,
         config: Config,
     ) -> Self {
-        unborrow!(saadc, irq, positive_pin);
+        unborrow!(irq, positive_pin);
 
         let r = unsafe { &*SAADC::ptr() };
 
@@ -118,8 +116,6 @@ impl<'d, T: PositivePin> OneShot<'d, T> {
         r.intenclr.write(|w| unsafe { w.bits(0x003F_FFFF) });
 
         Self {
-            peri: saadc,
-            positive_pin,
             irq,
             phantom: PhantomData,
         }
diff --git a/embassy-nrf/src/spim.rs b/embassy-nrf/src/spim.rs
index e5d077306..bb43b7c7c 100644
--- a/embassy-nrf/src/spim.rs
+++ b/embassy-nrf/src/spim.rs
@@ -30,8 +30,6 @@ pub enum Error {
 }
 
 pub struct Spim<'d, T: Instance> {
-    peri: T,
-    irq: T::Interrupt,
     phantom: PhantomData<&'d mut T>,
 }
 
@@ -54,14 +52,14 @@ impl Default for Config {
 
 impl<'d, T: Instance> Spim<'d, T> {
     pub fn new(
-        spim: impl Unborrow<Target = T> + 'd,
+        _spim: impl Unborrow<Target = T> + 'd,
         irq: impl Unborrow<Target = T::Interrupt> + 'd,
         sck: impl Unborrow<Target = impl GpioPin> + 'd,
         miso: impl Unborrow<Target = impl OptionalPin> + 'd,
         mosi: impl Unborrow<Target = impl OptionalPin> + 'd,
         config: Config,
     ) -> Self {
-        unborrow!(spim, irq, sck, miso, mosi);
+        unborrow!(irq, sck, miso, mosi);
 
         let r = T::regs();
 
@@ -140,8 +138,6 @@ impl<'d, T: Instance> Spim<'d, T> {
         irq.enable();
 
         Self {
-            peri: spim,
-            irq,
             phantom: PhantomData,
         }
     }
diff --git a/embassy-nrf/src/twim.rs b/embassy-nrf/src/twim.rs
index 3e0fbc3d0..05c4c260f 100644
--- a/embassy-nrf/src/twim.rs
+++ b/embassy-nrf/src/twim.rs
@@ -42,20 +42,18 @@ impl Default for Config {
 
 /// Interface to a TWIM instance.
 pub struct Twim<'d, T: Instance> {
-    peri: T,
-    irq: T::Interrupt,
     phantom: PhantomData<&'d mut T>,
 }
 
 impl<'d, T: Instance> Twim<'d, T> {
     pub fn new(
-        twim: impl Unborrow<Target = T> + 'd,
+        _twim: impl Unborrow<Target = T> + 'd,
         irq: impl Unborrow<Target = T::Interrupt> + 'd,
         sda: impl Unborrow<Target = impl GpioPin> + 'd,
         scl: impl Unborrow<Target = impl GpioPin> + 'd,
         config: Config,
     ) -> Self {
-        unborrow!(twim, irq, sda, scl);
+        unborrow!(irq, sda, scl);
 
         let r = T::regs();
 
@@ -94,8 +92,6 @@ impl<'d, T: Instance> Twim<'d, T> {
         irq.enable();
 
         Self {
-            peri: twim,
-            irq,
             phantom: PhantomData,
         }
     }