From 33dc2f06f609eb5d13e5e321ad7e0322adc17a42 Mon Sep 17 00:00:00 2001
From: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
Date: Wed, 24 Apr 2024 15:01:43 +1200
Subject: [PATCH] Revert "Add null GPIO pin (#6611)"

This reverts commit b8f0182fc5b93c45eeafb048695ac655bcf3297e.
---
 .../cst226/touchscreen/cst226_touchscreen.cpp  | 18 +++++++++++-------
 .../cst226/touchscreen/cst226_touchscreen.h    |  2 +-
 esphome/core/gpio.h                            | 18 ------------------
 3 files changed, 12 insertions(+), 26 deletions(-)

diff --git a/esphome/components/cst226/touchscreen/cst226_touchscreen.cpp b/esphome/components/cst226/touchscreen/cst226_touchscreen.cpp
index 69728dc666..d4e43d30f5 100644
--- a/esphome/components/cst226/touchscreen/cst226_touchscreen.cpp
+++ b/esphome/components/cst226/touchscreen/cst226_touchscreen.cpp
@@ -5,13 +5,17 @@ namespace cst226 {
 
 void CST226Touchscreen::setup() {
   esph_log_config(TAG, "Setting up CST226 Touchscreen...");
-  this->reset_pin_->setup();
-  this->reset_pin_->digital_write(true);
-  delay(5);
-  this->reset_pin_->digital_write(false);
-  delay(5);
-  this->reset_pin_->digital_write(true);
-  this->set_timeout(30, [this] { this->continue_setup_(); });
+  if (this->reset_pin_ != nullptr) {
+    this->reset_pin_->setup();
+    this->reset_pin_->digital_write(true);
+    delay(5);
+    this->reset_pin_->digital_write(false);
+    delay(5);
+    this->reset_pin_->digital_write(true);
+    this->set_timeout(30, [this] { this->continue_setup_(); });
+  } else {
+    this->continue_setup_();
+  }
 }
 
 void CST226Touchscreen::update_touches() {
diff --git a/esphome/components/cst226/touchscreen/cst226_touchscreen.h b/esphome/components/cst226/touchscreen/cst226_touchscreen.h
index 1b15b952c4..9f518e5068 100644
--- a/esphome/components/cst226/touchscreen/cst226_touchscreen.h
+++ b/esphome/components/cst226/touchscreen/cst226_touchscreen.h
@@ -35,7 +35,7 @@ class CST226Touchscreen : public touchscreen::Touchscreen, public i2c::I2CDevice
   void continue_setup_();
 
   InternalGPIOPin *interrupt_pin_{};
-  GPIOPin *reset_pin_{NULL_PIN};
+  GPIOPin *reset_pin_{};
   uint8_t chip_id_{};
   bool setup_complete_{};
 };
diff --git a/esphome/core/gpio.h b/esphome/core/gpio.h
index b3f6b00196..1b6f2ba1e6 100644
--- a/esphome/core/gpio.h
+++ b/esphome/core/gpio.h
@@ -62,24 +62,6 @@ class GPIOPin {
   virtual bool is_internal() { return false; }
 };
 
-/**
- * A pin to replace those that don't exist.
- */
-class NullPin : public GPIOPin {
- public:
-  void setup() override {}
-
-  void pin_mode(gpio::Flags _) override {}
-
-  bool digital_read() override { return false; }
-
-  void digital_write(bool _) override {}
-
-  std::string dump_summary() const override { return {"Not used"}; }
-};
-
-static GPIOPin *const NULL_PIN = new NullPin();
-
 /// Copy of GPIOPin that is safe to use from ISRs (with no virtual functions)
 class ISRInternalGPIOPin {
  public: