From 6f7db2f5f77a7fb32e938588f52ec910c16b50d8 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Tue, 21 Oct 2025 11:35:34 -1000
Subject: [PATCH] [gpio] Optimize switch interlock with FixedVector (#11448)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
---
 esphome/components/gpio/switch/gpio_switch.cpp | 2 +-
 esphome/components/gpio/switch/gpio_switch.h   | 7 +++----
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/esphome/components/gpio/switch/gpio_switch.cpp b/esphome/components/gpio/switch/gpio_switch.cpp
index b67af5e95d..9043a6a493 100644
--- a/esphome/components/gpio/switch/gpio_switch.cpp
+++ b/esphome/components/gpio/switch/gpio_switch.cpp
@@ -67,7 +67,7 @@ void GPIOSwitch::write_state(bool state) {
   this->pin_->digital_write(state);
   this->publish_state(state);
 }
-void GPIOSwitch::set_interlock(const std::vector<Switch *> &interlock) { this->interlock_ = interlock; }
+void GPIOSwitch::set_interlock(const std::initializer_list<Switch *> &interlock) { this->interlock_ = interlock; }
 
 }  // namespace gpio
 }  // namespace esphome
diff --git a/esphome/components/gpio/switch/gpio_switch.h b/esphome/components/gpio/switch/gpio_switch.h
index 94d49745b5..080decac08 100644
--- a/esphome/components/gpio/switch/gpio_switch.h
+++ b/esphome/components/gpio/switch/gpio_switch.h
@@ -2,10 +2,9 @@
 
 #include "esphome/core/component.h"
 #include "esphome/core/hal.h"
+#include "esphome/core/helpers.h"
 #include "esphome/components/switch/switch.h"
 
-#include <vector>
-
 namespace esphome {
 namespace gpio {
 
@@ -19,14 +18,14 @@ class GPIOSwitch : public switch_::Switch, public Component {
 
   void setup() override;
   void dump_config() override;
-  void set_interlock(const std::vector<Switch *> &interlock);
+  void set_interlock(const std::initializer_list<Switch *> &interlock);
   void set_interlock_wait_time(uint32_t interlock_wait_time) { interlock_wait_time_ = interlock_wait_time; }
 
  protected:
   void write_state(bool state) override;
 
   GPIOPin *pin_;
-  std::vector<Switch *> interlock_;
+  FixedVector<Switch *> interlock_;
   uint32_t interlock_wait_time_{0};
 };