light sleep: add cpu power down support for esp32c3

components/soc/esp32c3/include/soc/rtc_caps.h

@@ -0,0 +1,22 @@
+// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#define RTC_CNTL_CPU_PD_DMA_BUS_WIDTH       (128)
+#define RTC_CNTL_CPU_PD_REG_FILE_NUM        (108)
+#define RTC_CNTL_CPU_PD_DMA_ADDR_ALIGN      (RTC_CNTL_CPU_PD_DMA_BUS_WIDTH >> 3)
+#define RTC_CNTL_CPU_PD_DMA_BLOCK_SIZE      (RTC_CNTL_CPU_PD_DMA_BUS_WIDTH >> 3)
+
+#define RTC_CNTL_CPU_PD_RETENTION_MEM_SIZE  (RTC_CNTL_CPU_PD_REG_FILE_NUM * (RTC_CNTL_CPU_PD_DMA_BUS_WIDTH >> 3))

components/soc/esp32c3/include/soc/soc_caps.h

@@ -44,6 +44,7 @@
 #include "rmt_caps.h"
 #include "spi_caps.h"
 #include "uart_caps.h"
+#include "rtc_caps.h"
 
 /*-------------------------- TOUCH SENSOR CAPS -------------------------------*/
 #define SOC_TOUCH_SENSOR_NUM            (0)    /*! No touch sensors on ESP32-C3 */
@@ -126,3 +127,5 @@
 #define SOC_PM_SUPPORT_WIFI_WAKEUP      (1)
 
 #define SOC_PM_SUPPORT_BT_WAKEUP        (1)
+
+#define SOC_PM_SUPPORT_CPU_PD           (1)