diff --git a/cores/esp32/esp32-hal-rmt.c b/cores/esp32/esp32-hal-rmt.c
index 63ce3aa5956..6f6c6445f1a 100644
--- a/cores/esp32/esp32-hal-rmt.c
+++ b/cores/esp32/esp32-hal-rmt.c
@@ -478,11 +478,8 @@ bool rmtInit(int pin, rmt_ch_dir_t channel_direction, rmt_reserve_memsize_t mem_
     // TX Channel
     rmt_tx_channel_config_t tx_cfg;
     tx_cfg.gpio_num = pin;
-#if CONFIG_IDF_TARGET_ESP32C6
+    // CLK_APB for ESP32|S2|S3|C3 -- CLK_PLL_F80M for C6 -- CLK_XTAL for H2
     tx_cfg.clk_src = RMT_CLK_SRC_DEFAULT;
-#else
-    tx_cfg.clk_src = RMT_CLK_SRC_APB;
-#endif
     tx_cfg.resolution_hz = frequency_Hz;
     tx_cfg.mem_block_symbols = SOC_RMT_MEM_WORDS_PER_CHANNEL * mem_size;
     tx_cfg.trans_queue_depth = 10;   // maximum allowed
@@ -507,11 +504,8 @@ bool rmtInit(int pin, rmt_ch_dir_t channel_direction, rmt_reserve_memsize_t mem_
     // RX Channel
     rmt_rx_channel_config_t rx_cfg;
     rx_cfg.gpio_num = pin;
-#if CONFIG_IDF_TARGET_ESP32C6
+    // CLK_APB for ESP32|S2|S3|C3 -- CLK_PLL_F80M for C6 -- CLK_XTAL for H2
     rx_cfg.clk_src = RMT_CLK_SRC_DEFAULT;
-#else
-    rx_cfg.clk_src = RMT_CLK_SRC_APB;
-#endif
     rx_cfg.resolution_hz = frequency_Hz;
     rx_cfg.mem_block_symbols = SOC_RMT_MEM_WORDS_PER_CHANNEL * mem_size;
     rx_cfg.flags.invert_in = 0;
diff --git a/cores/esp32/esp32-hal-uart.c b/cores/esp32/esp32-hal-uart.c
index da3c2183ba8..efa618597e4 100644
--- a/cores/esp32/esp32-hal-uart.c
+++ b/cores/esp32/esp32-hal-uart.c
@@ -192,11 +192,8 @@ uart_t* uartBegin(uint8_t uart_nr, uint32_t baudrate, uint32_t config, int8_t rx
     uart_config.flow_ctrl = UART_HW_FLOWCTRL_DISABLE;
     uart_config.rx_flow_ctrl_thresh = rxfifo_full_thrhd;
     uart_config.baud_rate = baudrate;
-#if CONFIG_IDF_TARGET_ESP32C6
+    // CLK_APB for ESP32|S2|S3|C3 -- CLK_PLL_F40M for C2 -- CLK_PLL_F48M for H2 -- CLK_PLL_F80M for C6
     uart_config.source_clk = UART_SCLK_DEFAULT;
-#else
-    uart_config.source_clk = UART_SCLK_APB;
-#endif
     ESP_ERROR_CHECK(uart_driver_install(uart_nr, rx_buffer_size, tx_buffer_size, 20, &(uart->uart_event_queue), 0));
     ESP_ERROR_CHECK(uart_param_config(uart_nr, &uart_config));
     ESP_ERROR_CHECK(uart_set_pin(uart_nr, txPin, rxPin, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE));