time: implement Sum for Duration

2 files changed, 10 insertions, 0 deletions

diff --git a/embassy-time/CHANGELOG.md b/embassy-time/CHANGELOG.md
index a0c1abe8d..2e94e0112 100644
--- a/embassy-time/CHANGELOG.md
+++ b/embassy-time/CHANGELOG.md
@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Don't select `critical-section` impl for `std`
 - Manually implement the future for `with_timeout`
 - Add 133MHz tick rate to support PR2040 @ 133MHz when `TIMERx`'s `SOURCE` is set to `SYSCLK`
+- Implement Sum for Duration
 
 ## 0.4.0 - 2025-01-02
 
diff --git a/embassy-time/src/duration.rs b/embassy-time/src/duration.rs
index dcda705d3..5b140eeff 100644
--- a/embassy-time/src/duration.rs
+++ b/embassy-time/src/duration.rs
@@ -293,3 +293,12 @@ impl From<Duration> for core::time::Duration {
         core::time::Duration::from_micros(value.as_micros())
     }
 }
+
+impl core::iter::Sum for Duration {
+    fn sum<I>(iter: I) -> Self
+    where
+        I: Iterator<Item = Duration>,
+    {
+        Duration::from_ticks(iter.map(|d| d.as_ticks()).sum())
+    }
+}