From 151b1067b09fcc64e291254c0563da04b19d12a7 Mon Sep 17 00:00:00 2001
From: Charles Guan <3221512+charlesincharge@users.noreply.github.com>
Date: Thu, 2 Oct 2025 16:08:49 -0700
Subject: Enable input-buffer and enable output drive for I/O pin

---
 embassy-mspm0/CHANGELOG.md | 1 +
 embassy-mspm0/src/gpio.rs  | 7 ++++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/embassy-mspm0/CHANGELOG.md b/embassy-mspm0/CHANGELOG.md
index b846f21b1..aaa09892c 100644
--- a/embassy-mspm0/CHANGELOG.md
+++ b/embassy-mspm0/CHANGELOG.md
@@ -13,3 +13,4 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - feat: Add window watchdog implementation based on WWDT0, WWDT1 peripherals (#4574)
 - feat: Add MSPM0C1105/C1106 support
 - feat: Add adc implementation (#4646)
+- fix: gpio OutputOpenDrain config (#4735)
\ No newline at end of file
diff --git a/embassy-mspm0/src/gpio.rs b/embassy-mspm0/src/gpio.rs
index d5fd36dbf..f9a8d6b75 100644
--- a/embassy-mspm0/src/gpio.rs
+++ b/embassy-mspm0/src/gpio.rs
@@ -156,7 +156,12 @@ impl<'d> Flex<'d> {
             w.set_pf(GPIO_PF);
             w.set_hiz1(true);
             w.set_pc(true);
-            w.set_inena(false);
+            w.set_inena(true);
+        });
+
+        // Enable output driver (DOE) - required for open-drain to drive low
+        self.pin.block().doeset31_0().write(|w| {
+            w.set_dio(self.pin.bit_index(), true);
         });
 
         self.set_pull(Pull::None);
-- 
cgit