From 358c59bd8d63dc94bb1aeb22d90ad7dddefd731c Mon Sep 17 00:00:00 2001
From: tracestep <16390082+tracestep@users.noreply.github.com>
Date: Sun, 26 Mar 2023 18:59:57 -0300
Subject: [PATCH] SX1509 minimum loop period (fixes esphome/issues#4325)
 (#4613)

* Minimum loop period (fixes esphome/issues#4325)

* clang-tidy suggestions

* More clang-tidy suggestions
---
 esphome/components/sx1509/sx1509.cpp | 3 +++
 esphome/components/sx1509/sx1509.h   | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/esphome/components/sx1509/sx1509.cpp b/esphome/components/sx1509/sx1509.cpp
index 60cbae6aa6..d0a84b99ff 100644
--- a/esphome/components/sx1509/sx1509.cpp
+++ b/esphome/components/sx1509/sx1509.cpp
@@ -42,6 +42,9 @@ void SX1509Component::dump_config() {
 
 void SX1509Component::loop() {
   if (this->has_keypad_) {
+    if (millis() - this->last_loop_timestamp_ < min_loop_period_)
+      return;
+    this->last_loop_timestamp_ = millis();
     uint16_t key_data = this->read_key_data();
     for (auto *binary_sensor : this->keypad_binary_sensors_)
       binary_sensor->process(key_data);
diff --git a/esphome/components/sx1509/sx1509.h b/esphome/components/sx1509/sx1509.h
index 50230b1086..8e3b41e233 100644
--- a/esphome/components/sx1509/sx1509.h
+++ b/esphome/components/sx1509/sx1509.h
@@ -69,6 +69,9 @@ class SX1509Component : public Component, public i2c::I2CDevice {
   uint8_t debounce_time_ = 1;
   std::vector<SX1509Processor *> keypad_binary_sensors_;
 
+  uint32_t last_loop_timestamp_ = 0;
+  const uint32_t min_loop_period_ = 15;  // ms
+
   void setup_keypad_();
   void set_debounce_config_(uint8_t config_value);
   void set_debounce_time_(uint8_t time);