diff --git a/esp-hal/src/analog/adc/esp32.rs b/esp-hal/src/analog/adc/esp32.rs
index 9f6f5f6d920..d7e90177a4b 100644
--- a/esp-hal/src/analog/adc/esp32.rs
+++ b/esp-hal/src/analog/adc/esp32.rs
@@ -249,7 +249,9 @@ impl RegisterAccess for ADC2 {
 /// Analog-to-Digital Converter peripheral driver.
 pub struct ADC<'d, ADC> {
     _adc: PeripheralRef<'d, ADC>,
+    #[allow(dead_code)] // FIXME
     attenuations: [Option<Attenuation>; 10],
+    #[allow(dead_code)] // FIXME
     active_channel: Option<u8>,
 }
 
@@ -418,6 +420,7 @@ macro_rules! impl_adc_interface {
 }
 
 mod adc_implementation {
+    #[cfg(feature = "embedded-hal-02")]
     use crate::peripherals::{ADC1, ADC2};
 
     impl_adc_interface! {
diff --git a/esp-hal/src/analog/adc/riscv.rs b/esp-hal/src/analog/adc/riscv.rs
index 406b24a4471..599062ac010 100644
--- a/esp-hal/src/analog/adc/riscv.rs
+++ b/esp-hal/src/analog/adc/riscv.rs
@@ -486,7 +486,9 @@ impl CalibrationAccess for crate::peripherals::ADC2 {
 /// Analog-to-Digital Converter peripheral driver.
 pub struct ADC<'d, ADCI> {
     _adc: PeripheralRef<'d, ADCI>,
+    #[allow(dead_code)] // FIXME
     attenuations: [Option<Attenuation>; NUM_ATTENS],
+    #[allow(dead_code)] // FIXME
     active_channel: Option<u8>,
 }
 
@@ -648,6 +650,7 @@ macro_rules! impl_adc_interface {
 
 #[cfg(esp32c2)]
 mod adc_implementation {
+    #[cfg(feature = "embedded-hal-02")]
     use crate::peripherals::ADC1;
 
     impl_adc_interface! {
@@ -663,6 +666,7 @@ mod adc_implementation {
 
 #[cfg(esp32c3)]
 mod adc_implementation {
+    #[cfg(feature = "embedded-hal-02")]
     use crate::peripherals::{ADC1, ADC2};
 
     impl_adc_interface! {
@@ -684,6 +688,7 @@ mod adc_implementation {
 
 #[cfg(esp32c6)]
 mod adc_implementation {
+    #[cfg(feature = "embedded-hal-02")]
     use crate::peripherals::ADC1;
 
     impl_adc_interface! {
@@ -701,6 +706,7 @@ mod adc_implementation {
 
 #[cfg(esp32h2)]
 mod adc_implementation {
+    #[cfg(feature = "embedded-hal-02")]
     use crate::peripherals::ADC1;
 
     impl_adc_interface! {
diff --git a/esp-hal/src/analog/adc/xtensa.rs b/esp-hal/src/analog/adc/xtensa.rs
index 096fd1ac52f..c3ccb9b9655 100644
--- a/esp-hal/src/analog/adc/xtensa.rs
+++ b/esp-hal/src/analog/adc/xtensa.rs
@@ -524,7 +524,9 @@ impl CalibrationAccess for crate::peripherals::ADC2 {
 /// Analog-to-Digital Converter peripheral driver.
 pub struct ADC<'d, ADC> {
     _adc: PeripheralRef<'d, ADC>,
+    #[allow(dead_code)] // FIXME
     attenuations: [Option<Attenuation>; 10],
+    #[allow(dead_code)] // FIXME
     active_channel: Option<u8>,
 }
 
@@ -719,6 +721,7 @@ macro_rules! impl_adc_interface {
 }
 
 mod adc_implementation {
+    #[cfg(feature = "embedded-hal-02")]
     use crate::peripherals::{ADC1, ADC2};
 
     impl_adc_interface! {
diff --git a/esp-hal/src/i2c.rs b/esp-hal/src/i2c.rs
index 6af5ab12ad2..43a8e5b259d 100644
--- a/esp-hal/src/i2c.rs
+++ b/esp-hal/src/i2c.rs
@@ -255,10 +255,10 @@ where
         self.peripheral.master_write_read(address, bytes, buffer)
     }
 
-    fn transaction<'a>(
+    fn transaction(
         &mut self,
         _address: u8,
-        _operations: &mut [embedded_hal::i2c::Operation<'a>],
+        _operations: &mut [embedded_hal::i2c::Operation<'_>],
     ) -> Result<(), Self::Error> {
         todo!()
     }
diff --git a/esp-hal/src/rng.rs b/esp-hal/src/rng.rs
index d3ee9cfc426..8ea996f4a7b 100644
--- a/esp-hal/src/rng.rs
+++ b/esp-hal/src/rng.rs
@@ -63,7 +63,9 @@
 //! rng.read(&mut buffer).unwrap();
 //! ```
 
-use core::{convert::Infallible, marker::PhantomData};
+#[cfg(feature = "embedded-hal-02")]
+use core::convert::Infallible;
+use core::marker::PhantomData;
 
 use crate::{peripheral::Peripheral, peripherals::RNG};
 
diff --git a/esp-hal/src/rtc_cntl/mod.rs b/esp-hal/src/rtc_cntl/mod.rs
index b72a9387ab2..c813c0ed296 100644
--- a/esp-hal/src/rtc_cntl/mod.rs
+++ b/esp-hal/src/rtc_cntl/mod.rs
@@ -805,7 +805,7 @@ impl Rwdt {
         self.set_write_protection(true);
     }
 
-    fn set_timeout(&mut self, timeout: MicrosDurationU64) {
+    pub fn set_timeout(&mut self, timeout: MicrosDurationU64) {
         #[cfg(not(any(esp32c6, esp32h2)))]
         let rtc_cntl = unsafe { &*LPWR::PTR };
         #[cfg(any(esp32c6, esp32h2))]
diff --git a/esp-hal/src/spi/master.rs b/esp-hal/src/spi/master.rs
index 9941a72a2fb..6bf8beab8d1 100644
--- a/esp-hal/src/spi/master.rs
+++ b/esp-hal/src/spi/master.rs
@@ -1532,29 +1532,27 @@ pub mod dma {
             }
 
             fn write(&mut self, words: &[u8]) -> Result<(), Self::Error> {
-                Ok(
-                    if !crate::soc::is_valid_ram_address(&words[0] as *const _ as u32) {
-                        for chunk in words.chunks(SIZE) {
-                            self.buffer[..chunk.len()].copy_from_slice(chunk);
-                            self.inner.write(&self.buffer[..chunk.len()])?;
-                        }
-                    } else {
-                        self.inner.write(words)?;
-                    },
-                )
+                if !crate::soc::is_valid_ram_address(&words[0] as *const _ as u32) {
+                    for chunk in words.chunks(SIZE) {
+                        self.buffer[..chunk.len()].copy_from_slice(chunk);
+                        self.inner.write(&self.buffer[..chunk.len()])?;
+                    }
+                } else {
+                    self.inner.write(words)?;
+                }
+                Ok(())
             }
 
             fn transfer(&mut self, read: &mut [u8], write: &[u8]) -> Result<(), Self::Error> {
-                Ok(
-                    if !crate::soc::is_valid_ram_address(&write[0] as *const _ as u32) {
-                        for (read, write) in read.chunks_mut(SIZE).zip(write.chunks(SIZE)) {
-                            self.buffer[..write.len()].copy_from_slice(write);
-                            self.inner.transfer(read, &self.buffer[..write.len()])?;
-                        }
-                    } else {
-                        self.inner.transfer(read, write)?;
-                    },
-                )
+                if !crate::soc::is_valid_ram_address(&write[0] as *const _ as u32) {
+                    for (read, write) in read.chunks_mut(SIZE).zip(write.chunks(SIZE)) {
+                        self.buffer[..write.len()].copy_from_slice(write);
+                        self.inner.transfer(read, &self.buffer[..write.len()])?;
+                    }
+                } else {
+                    self.inner.transfer(read, write)?;
+                }
+                Ok(())
             }
 
             fn transfer_in_place(&mut self, words: &mut [u8]) -> Result<(), Self::Error> {
@@ -1608,9 +1606,9 @@ mod ehal1 {
 
         fn transfer(&mut self, read: &mut [u8], write: &[u8]) -> Result<(), Self::Error> {
             // Optimizations
-            if read.len() == 0 {
+            if read.is_empty() {
                 SpiBus::write(self, write)?;
-            } else if write.len() == 0 {
+            } else if write.is_empty() {
                 SpiBus::read(self, read)?;
             }
 
diff --git a/esp-hal/src/timer.rs b/esp-hal/src/timer.rs
index ad97998c5c9..a2a492779b3 100644
--- a/esp-hal/src/timer.rs
+++ b/esp-hal/src/timer.rs
@@ -40,6 +40,7 @@ use core::{
 };
 
 use fugit::{HertzU32, MicrosDurationU64};
+#[cfg(feature = "embedded-hal-02")]
 use void::Void;
 
 #[cfg(timg1)]
@@ -221,6 +222,7 @@ where
 /// General-purpose Timer driver
 pub struct Timer<T> {
     timg: T,
+    #[allow(dead_code)] // FIXME
     apb_clk_freq: HertzU32,
 }
 
@@ -638,6 +640,7 @@ where
     }
 }
 
+#[allow(dead_code)] // FIXME
 fn timeout_to_ticks<T, F>(timeout: T, clock: F, divider: u32) -> u64
 where
     T: Into<MicrosDurationU64>,
@@ -781,7 +784,7 @@ where
             .write(|w| unsafe { w.wdt_wkey().bits(0u32) });
     }
 
-    fn feed(&mut self) {
+    pub fn feed(&mut self) {
         let reg_block = unsafe { &*TG::register_block() };
 
         reg_block
@@ -795,7 +798,7 @@ where
             .write(|w| unsafe { w.wdt_wkey().bits(0u32) });
     }
 
-    fn set_timeout(&mut self, timeout: MicrosDurationU64) {
+    pub fn set_timeout(&mut self, timeout: MicrosDurationU64) {
         let timeout_raw = (timeout.to_nanos() * 10 / 125) as u32;
 
         let reg_block = unsafe { &*TG::register_block() };