fix(clk): 400MHz CPU should still be selectable on ESP32-P4 less than rev3

Author: songruo

components/esp_system/port/CMakeLists.txt

@@ -6,6 +6,10 @@ endif()
 
 target_include_directories(${COMPONENT_LIB} PRIVATE ${INCLUDE_FILES} include/private)
 
+if(CONFIG_ESP32P4_SELECTS_REV_LESS_V3 AND CONFIG_ESP_DEFAULT_CPU_FREQ_MHZ_400)
+    message(WARNING "400 MHz CPU frequency is not guaranteed to work on all chips with revision prior to rev 3!")
+endif()
+
 set(srcs "cpu_start.c" "panic_handler.c" "esp_system_chip.c")
 
 if(NOT CONFIG_APP_BUILD_TYPE_PURE_RAM_APP)

components/esp_system/port/soc/esp32p4/Kconfig.cpu

@@ -14,7 +14,6 @@ choice ESP_DEFAULT_CPU_FREQ_MHZ
         depends on ESP32P4_SELECTS_REV_LESS_V3
     config ESP_DEFAULT_CPU_FREQ_MHZ_400
         bool "400 MHz"
-        depends on !ESP32P4_SELECTS_REV_LESS_V3
 endchoice
 
 config ESP_DEFAULT_CPU_FREQ_MHZ