diff --git a/va416xx-hal/src/spi.rs b/va416xx-hal/src/spi.rs
index 1d75479..3e88471 100644
--- a/va416xx-hal/src/spi.rs
+++ b/va416xx-hal/src/spi.rs
@@ -653,7 +653,7 @@ where
     pub fn cfg_transfer<HwCs: OptionalHwCs<SpiInstance>>(
         &mut self,
         transfer_cfg: &TransferConfigWithHwcs<HwCs>,
-    ) -> Result<(), SpiClkConfigError> {
+    ) {
         if let Some(trans_clk_div) = transfer_cfg.cfg.clk_cfg {
             self.cfg_clock(trans_clk_div);
         }
@@ -679,7 +679,6 @@ where
             }
             w
         });
-        Ok(())
     }
 
     fn flush_internal(&self) {
@@ -883,7 +882,7 @@ where
 
             pub fn cfg_transfer<HwCs: OptionalHwCs<SpiI>>(
                 &mut self, transfer_cfg: &TransferConfigWithHwcs<HwCs>
-            ) -> Result<(), SpiClkConfigError>;
+            );
         }
     }
 
@@ -1060,23 +1059,13 @@ impl<
 where
     <Word as TryFrom<u32>>::Error: core::fmt::Debug,
 {
-    fn read(&mut self, words: &mut [Word]) -> Result<(), Self::Error> {
-        self.inner.read(words)
-    }
-
-    fn write(&mut self, words: &[Word]) -> Result<(), Self::Error> {
-        self.inner.write(words)
-    }
-
-    fn transfer(&mut self, read: &mut [Word], write: &[Word]) -> Result<(), Self::Error> {
-        self.inner.transfer(read, write)
-    }
-
-    fn transfer_in_place(&mut self, words: &mut [Word]) -> Result<(), Self::Error> {
-        self.inner.transfer_in_place(words)
-    }
-
-    fn flush(&mut self) -> Result<(), Self::Error> {
-        self.inner.flush()
+    delegate::delegate! {
+        to self.inner {
+            fn read(&mut self, words: &mut [Word]) -> Result<(), Self::Error>;
+            fn write(&mut self, words: &[Word]) -> Result<(), Self::Error>;
+            fn transfer(&mut self, read: &mut [Word], write: &[Word]) -> Result<(), Self::Error>;
+            fn transfer_in_place(&mut self, words: &mut [Word]) -> Result<(), Self::Error>;
+            fn flush(&mut self) -> Result<(), Self::Error>;
+        }
     }
 }