Merge #1069

1069: GPIOTE InputChannel with mutable reference. r=Dirbaio a=Ardelean-Calin

Adding these changes enables us to define a channel using a mutable reference to `GPIOTE_CH(n)`, similar to how we can do with other drivers. So instead of using:
```rust
let p = embassy_nrf::init(config);
let freq_in = InputChannel::new(
    p.GPIOTE_CH0,
    Input::new(&mut p.P0_19, embassy_nrf::gpio::Pull::Up),
    embassy_nrf::gpiote::InputChannelPolarity::HiToLo,
);
```
we can use:
```rust
let p = embassy_nrf::init(config);
let freq_in = InputChannel::new(
    &mut p.GPIOTE_CH0,
    Input::new(&mut p.P0_19, embassy_nrf::gpio::Pull::Up),
    embassy_nrf::gpiote::InputChannelPolarity::HiToLo,
);
```
therefore not giving ownership to GPIOTE_CH0.

Co-authored-by: Ardelean Călin Petru <[email protected]>
Co-authored-by: Ardelean Calin <[email protected]>

1 files changed, 8 insertions, 5 deletions

diff --git a/embassy-nrf/src/gpiote.rs b/embassy-nrf/src/gpiote.rs
index 25ad90496..7f7468a20 100644
--- a/embassy-nrf/src/gpiote.rs
+++ b/embassy-nrf/src/gpiote.rs
@@ -2,7 +2,7 @@ use core::convert::Infallible;
 use core::future::{poll_fn, Future};
 use core::task::{Context, Poll};
 
-use embassy_hal_common::{impl_peripheral, Peripheral, PeripheralRef};
+use embassy_hal_common::{impl_peripheral, into_ref, Peripheral, PeripheralRef};
 use embassy_sync::waitqueue::AtomicWaker;
 
 use crate::gpio::sealed::Pin as _;
@@ -148,7 +148,7 @@ impl Iterator for BitIter {
 
 /// GPIOTE channel driver in input mode
 pub struct InputChannel<'d, C: Channel, T: GpioPin> {
-    ch: C,
+    ch: PeripheralRef<'d, C>,
     pin: Input<'d, T>,
 }
 
@@ -162,7 +162,9 @@ impl<'d, C: Channel, T: GpioPin> Drop for InputChannel<'d, C, T> {
 }
 
 impl<'d, C: Channel, T: GpioPin> InputChannel<'d, C, T> {
-    pub fn new(ch: C, pin: Input<'d, T>, polarity: InputChannelPolarity) -> Self {
+    pub fn new(ch: impl Peripheral<P = C> + 'd, pin: Input<'d, T>, polarity: InputChannelPolarity) -> Self {
+        into_ref!(ch);
+
         let g = regs();
         let num = ch.number();
 
@@ -215,7 +217,7 @@ impl<'d, C: Channel, T: GpioPin> InputChannel<'d, C, T> {
 
 /// GPIOTE channel driver in output mode
 pub struct OutputChannel<'d, C: Channel, T: GpioPin> {
-    ch: C,
+    ch: PeripheralRef<'d, C>,
     _pin: Output<'d, T>,
 }
 
@@ -229,7 +231,8 @@ impl<'d, C: Channel, T: GpioPin> Drop for OutputChannel<'d, C, T> {
 }
 
 impl<'d, C: Channel, T: GpioPin> OutputChannel<'d, C, T> {
-    pub fn new(ch: C, pin: Output<'d, T>, polarity: OutputChannelPolarity) -> Self {
+    pub fn new(ch: impl Peripheral<P = C> + 'd, pin: Output<'d, T>, polarity: OutputChannelPolarity) -> Self {
+        into_ref!(ch);
         let g = regs();
         let num = ch.number();