esp32: initialize PM at startup, add Kconfig options

components/esp32/cpu_start.c

@@ -66,6 +66,8 @@
 #include "esp_spiram.h"
 #include "esp_clk_internal.h"
 #include "esp_timer.h"
+#include "esp_pm.h"
+#include "pm_impl.h"
 #include "trax.h"
 
 #define STRINGIFY(s) STRINGIFY2(s)
@@ -337,6 +339,18 @@ void start_cpu0_default(void)
     spi_flash_init();
     /* init default OS-aware flash access critical section */
     spi_flash_guard_set(&g_flash_guard_default_ops);
+#ifdef CONFIG_PM_ENABLE
+    esp_pm_impl_init();
+#ifdef CONFIG_PM_DFS_INIT_AUTO
+    rtc_cpu_freq_t max_freq;
+    rtc_clk_cpu_freq_from_mhz(CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ, &max_freq);
+    esp_pm_config_esp32_t cfg = {
+            .max_cpu_freq = max_freq,
+            .min_cpu_freq = RTC_CPU_FREQ_XTAL
+    };
+    esp_pm_configure(&cfg);
+#endif //CONFIG_PM_DFS_INIT_AUTO
+#endif //CONFIG_PM_ENABLE
 
 #if CONFIG_ESP32_ENABLE_COREDUMP
     esp_core_dump_init();