examples/wifi/power_save: enable tickless idle

examples/wifi/power_save/main/power_save.c

@@ -102,7 +102,10 @@ void app_main()
     rtc_clk_cpu_freq_from_mhz(CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ, &max_freq);
     esp_pm_config_esp32_t pm_config = {
             .max_cpu_freq = max_freq,
-            .min_cpu_freq = RTC_CPU_FREQ_XTAL
+            .min_cpu_freq = RTC_CPU_FREQ_XTAL,
+#if CONFIG_FREERTOS_USE_TICKLESS_IDLE
+            .light_sleep_enable = true
+#endif
     };
     ESP_ERROR_CHECK( esp_pm_configure(&pm_config) );
 #endif // CONFIG_PM_ENABLE

examples/wifi/power_save/sdkconfig.defaults

@@ -2,5 +2,7 @@
 CONFIG_ESP32_DEFAULT_CPU_FREQ_80=y
 # Enable support for power management
 CONFIG_PM_ENABLE=y
+# Enable tickless idle mode
+CONFIG_FREERTOS_USE_TICKLESS_IDLE=y
 # Use RTC timer as reference
 CONFIG_PM_USE_RTC_TIMER_REF=y