From 2ff55e305825557c66dbd916eb61eea92ebb9644 Mon Sep 17 00:00:00 2001
From: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
Date: Wed, 12 Aug 2026 00:23:08 +1200
Subject: [PATCH] [rp2] Use SDK clock query directly in arch_get_cpu_freq_hz
 (#18269)

---
 esphome/components/rp2/hal.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/esphome/components/rp2/hal.cpp b/esphome/components/rp2/hal.cpp
index 8eb1b469bc..ac1467e5e6 100644
--- a/esphome/components/rp2/hal.cpp
+++ b/esphome/components/rp2/hal.cpp
@@ -7,6 +7,7 @@
 #include "crash_handler.h"
 #endif
 
+#include "hardware/clocks.h"
 #include "hardware/watchdog.h"
 
 // Empty rp2 namespace block to satisfy ci-custom's lint_namespace check.
@@ -33,7 +34,8 @@ void arch_init() {
 #endif
 }
 
-uint32_t arch_get_cpu_freq_hz() { return RP2040::f_cpu(); }
+// clock_get_hz(clk_sys) is the SDK query for the current system clock frequency in Hz.
+uint32_t arch_get_cpu_freq_hz() { return clock_get_hz(clk_sys); }
 
 }  // namespace esphome