Add defmt feature to CI, changelog

.github/workflows/rust.yml

@@ -41,7 +41,7 @@ jobs:
     - name: Install a stable toolchain with clippy
       run: rustup toolchain install stable --no-self-update --profile minimal --component clippy
     - name: Lint imxrt-hal
-      run: cargo clippy --features=${{ matrix.chips }} --package=imxrt-hal -- -D warnings
+      run: cargo clippy --features=${{ matrix.chips }} --features=defmt --package=imxrt-hal -- -D warnings
 
   # Indirectly checks & lints the HAL with the HAL's chip feature, and also
   # checks & lints the imxrt-log package.
@@ -63,7 +63,7 @@ jobs:
     - name: Install a stable toolchain with clippy
       run: rustup toolchain install stable --no-self-update --profile minimal --component clippy
     - name: Lint imxrt-log
-      run: cargo clippy --features=${{ matrix.chips }} --package=imxrt-log --package=imxrt-hal -- -D warnings
+      run: cargo clippy --features=${{ matrix.chips }} --features=defmt --package=imxrt-log --package=imxrt-hal -- -D warnings
 
   # Lint and build examples for boards.
   examples:
@@ -136,7 +136,7 @@ jobs:
     - name: Install a stable toolchain
       run: rustup toolchain install stable --no-self-update --profile minimal
     - name: Run unit, integration tests
-      run: cargo test --features=${{ matrix.chips }} --tests --package=imxrt-hal --package=imxrt-log
+      run: cargo test --features=${{ matrix.chips }} --features=defmt --tests --package=imxrt-hal --package=imxrt-log
 
   # Ensures that documentation builds, and that links are valid
   docs:

CHANGELOG.md

@@ -29,6 +29,9 @@ are still exposed when building with a chip feature.
 
 Introduce an `imxrt1180` feature to support the RT1180 series.
 
+Add a `defmt` feature targeting version 0.3. When enabled, select imxrt-hal
+types can be formatted with `defmt`.
+
 ## [0.5.9] 2024-11-24
 
 Correct LPSPI receive operations. Previously, `u8` and `u16` elements received