nrf: replace PhantomData usages with PeripheralRef.

embassy-nrf/src/pwm.rs

@@ -1,6 +1,5 @@
 #![macro_use]
 
-use core::marker::PhantomData;
 use core::sync::atomic::{compiler_fence, Ordering};
 
 use embassy_hal_common::{into_ref, PeripheralRef};
@@ -15,7 +14,7 @@ use crate::{pac, Peripheral};
 /// SimplePwm is the traditional pwm interface you're probably used to, allowing
 /// to simply set a duty cycle across up to four channels.
 pub struct SimplePwm<'d, T: Instance> {
-    phantom: PhantomData<&'d mut T>,
+    _peri: PeripheralRef<'d, T>,
     duty: [u16; 4],
     ch0: Option<PeripheralRef<'d, AnyPin>>,
     ch1: Option<PeripheralRef<'d, AnyPin>>,
@@ -26,7 +25,7 @@ pub struct SimplePwm<'d, T: Instance> {
 /// SequencePwm allows you to offload the updating of a sequence of duty cycles
 /// to up to four channels, as well as repeat that sequence n times.
 pub struct SequencePwm<'d, T: Instance> {
-    phantom: PhantomData<&'d mut T>,
+    _peri: PeripheralRef<'d, T>,
     ch0: Option<PeripheralRef<'d, AnyPin>>,
     ch1: Option<PeripheralRef<'d, AnyPin>>,
     ch2: Option<PeripheralRef<'d, AnyPin>>,
@@ -120,6 +119,8 @@ impl<'d, T: Instance> SequencePwm<'d, T> {
         ch3: Option<PeripheralRef<'d, AnyPin>>,
         config: Config,
     ) -> Result<Self, Error> {
+        into_ref!(_pwm);
+
         let r = T::regs();
 
         if let Some(pin) = &ch0 {
@@ -168,7 +169,7 @@ impl<'d, T: Instance> SequencePwm<'d, T> {
         r.countertop.write(|w| unsafe { w.countertop().bits(config.max_duty) });
 
         Ok(Self {
-            phantom: PhantomData,
+            _peri: _pwm,
             ch0,
             ch1,
             ch2,
@@ -639,6 +640,8 @@ impl<'d, T: Instance> SimplePwm<'d, T> {
         ch2: Option<PeripheralRef<'d, AnyPin>>,
         ch3: Option<PeripheralRef<'d, AnyPin>>,
     ) -> Self {
+        into_ref!(_pwm);
+
         let r = T::regs();
 
         if let Some(pin) = &ch0 {
@@ -666,7 +669,7 @@ impl<'d, T: Instance> SimplePwm<'d, T> {
         r.psel.out[3].write(|w| unsafe { w.bits(ch3.psel_bits()) });
 
         let pwm = Self {
-            phantom: PhantomData,
+            _peri: _pwm,
             ch0,
             ch1,
             ch2,