From e8547b16f6bd5831dc6f8d5d5e07269371b0c3ad Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Tue, 17 Jun 2025 13:20:41 +0200
Subject: [PATCH] Avoid polling for GPIO binary sensors when possible

---
 .../components/gpio/binary_sensor/gpio_binary_sensor.h   | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/esphome/components/gpio/binary_sensor/gpio_binary_sensor.h b/esphome/components/gpio/binary_sensor/gpio_binary_sensor.h
index e517376d0f..304ba465e9 100644
--- a/esphome/components/gpio/binary_sensor/gpio_binary_sensor.h
+++ b/esphome/components/gpio/binary_sensor/gpio_binary_sensor.h
@@ -21,10 +21,13 @@ class GPIOBinarySensorStore {
   }
 
   bool has_changed() {
-    InterruptLock lock;
-    bool changed = this->changed_;
+    // No lock needed: single writer (ISR) / single reader (main loop) pattern
+    // Volatile bool operations are atomic on all ESPHome-supported platforms
+    if (!this->changed_) {
+      return false;
+    }
     this->changed_ = false;
-    return changed;
+    return true;
   }
 
  protected: