From 2fc85ca5a176efa54f580ed6c11768a0757024fa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=A0=D1=83=D1=81=D0=BB=D0=B0=D0=BD=20=D0=A3=D1=81?=
 <r.us@ideco.ru>
Date: Thu, 9 Jul 2026 17:34:57 +0500
Subject: [PATCH] bugfix: fix hardcoded clk_source

---
 i2cdev.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/i2cdev.c b/i2cdev.c
index 5c106b6..61b4baa 100644
--- a/i2cdev.c
+++ b/i2cdev.c
@@ -423,13 +423,19 @@ static esp_err_t i2c_setup_port(i2c_dev_t *dev) // dev is non-const to update de
             .i2c_port = dev->port,
             .sda_io_num = sda_pin,
             .scl_io_num = scl_pin,
-            .clk_source = I2C_CLK_SRC_DEFAULT,
             .glitch_ignore_cnt = 7,
             .flags.enable_internal_pullup = (sda_pullup || scl_pullup),
             // Bus speed is not set here. It's per-device or a global target for the bus can be set
             // if desired, but i2c_master supports per-device speeds.
         };
 
+#if SOC_LP_I2C_SUPPORTED
+        bus_config.clk_source = dev->port == (i2c_port_num_t)LP_I2C_NUM_0
+            ? LP_I2C_SCLK_DEFAULT
+            : I2C_CLK_SRC_DEFAULT;
+#else
+        bus_config.clk_source = I2C_CLK_SRC_DEFAULT;
+#endif
         res = i2c_new_master_bus(&bus_config, &port_state->bus_handle);
         if (res == ESP_OK)
         {