From 9c5d1a7fed048e4d4be3171c92dffaab8d217fdc Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Wed, 29 Apr 2026 07:17:37 -0500
Subject: [PATCH] [libretiny] Inline delayMicroseconds() in hal_libretiny.h
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The wrapper is a one-liner forwarding to Arduino's ::delayMicroseconds.
Add the forward decl to the existing NOLINTBEGIN block (alongside yield,
delay, micros, millis) and inline the body — same pattern as the other
Arduino-flavored wrappers in this header. Drops the out-of-line copy
from components/libretiny/hal.cpp.
---
 esphome/components/libretiny/hal.cpp | 7 +++----
 esphome/core/hal/hal_libretiny.h     | 4 +++-
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/esphome/components/libretiny/hal.cpp b/esphome/components/libretiny/hal.cpp
index 4e94d5242b..e6dbb7296c 100644
--- a/esphome/components/libretiny/hal.cpp
+++ b/esphome/components/libretiny/hal.cpp
@@ -14,10 +14,9 @@ namespace esphome::libretiny {}  // namespace esphome::libretiny
 
 namespace esphome {
 
-// yield(), delay(), micros(), millis(), millis_64(), arch_feed_wdt(),
-// arch_get_cpu_cycle_count(), arch_get_cpu_freq_hz() inlined in
-// core/hal/hal_libretiny.h.
-void IRAM_ATTR HOT delayMicroseconds(uint32_t us) { ::delayMicroseconds(us); }
+// yield(), delay(), micros(), millis(), millis_64(), delayMicroseconds(),
+// arch_feed_wdt(), arch_get_cpu_cycle_count(), arch_get_cpu_freq_hz()
+// inlined in core/hal/hal_libretiny.h.
 
 void arch_init() {
   libretiny::setup_preferences();
diff --git a/esphome/core/hal/hal_libretiny.h b/esphome/core/hal/hal_libretiny.h
index e519698ce0..db0fc11bfb 100644
--- a/esphome/core/hal/hal_libretiny.h
+++ b/esphome/core/hal/hal_libretiny.h
@@ -51,6 +51,7 @@ extern "C" void yield(void);
 extern "C" void delay(unsigned long ms);
 extern "C" unsigned long micros(void);
 extern "C" unsigned long millis(void);
+extern "C" void delayMicroseconds(unsigned int us);
 // NOLINTEND(google-runtime-int,readability-identifier-naming,readability-redundant-declaration)
 
 // Forward decls from libretiny's <lt_api.h> family for the inline arch_*
@@ -95,11 +96,12 @@ __attribute__((always_inline)) inline uint32_t millis() { return static_cast<uin
 #endif
 __attribute__((always_inline)) inline uint64_t millis_64() { return Millis64Impl::compute(millis()); }
 
+// NOLINTNEXTLINE(readability-identifier-naming)
+__attribute__((always_inline)) inline void delayMicroseconds(uint32_t us) { ::delayMicroseconds(us); }
 __attribute__((hot, always_inline)) inline void arch_feed_wdt() { lt_wdt_feed(); }
 __attribute__((always_inline)) inline uint32_t arch_get_cpu_cycle_count() { return lt_cpu_get_cycle_count(); }
 __attribute__((always_inline)) inline uint32_t arch_get_cpu_freq_hz() { return lt_cpu_get_freq(); }
 
-void delayMicroseconds(uint32_t us);  // NOLINT(readability-identifier-naming)
 void arch_init();
 
 }  // namespace esphome