risc-v/esp32c3: Configure clock and call board initialize at startup.

Signed-off-by: Abdelatif Guettouche <abdelatif.guettouche@espressif.com>

arch/risc-v/src/esp32c3/esp32c3_start.c

@@ -29,10 +29,11 @@
 
 #include <arch/board/board.h>
 
-#include "chip.h"
 #include "esp32c3.h"
+#include "esp32c3_clockconfig.h"
 #include "esp32c3_irq.h"
 #include "esp32c3_lowputc.h"
+#include "esp32c3_start.h"
 
 /****************************************************************************
  * Pre-processor Definitions
@@ -66,6 +67,10 @@ void __esp32c3_start(void)
 {
   uint32_t *dest;
 
+  /* Set CPU frequency */
+
+  esp32c3_clockconfig();
+
   /* Configure the UART so we can get debug output */
 
   esp32c3_lowsetup();
@@ -83,7 +88,11 @@ void __esp32c3_start(void)
 
   showprogress('B');
 
-  /* Call nx_start() */
+  /* Initialize onboard resources */
+
+  esp32c3_board_initialize();
+
+  /* Bring up NuttX */
 
   nx_start();
 

arch/risc-v/src/esp32c3/esp32c3_start.h

@@ -0,0 +1,54 @@
+/****************************************************************************
+ * arch/risc-v/src/esp32c3/esp32c3_start.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#ifndef __ARCH_RISCV_SRC_ESP32C3_ESP32C3_START_H
+#define __ARCH_RISCV_SRC_ESP32C3_ESP32C3_START_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: esp32c3_board_initialize
+ *
+ * Description:
+ *   All ESP32 architectures must provide the following entry point.  This
+ *   entry point is called early in the initialization -- after all memory
+ *   has been configured but before any devices have been initialized.
+ *
+ * Input Parameters:
+ *   None
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+void esp32c3_board_initialize(void);
+
+#endif /* __ARCH_RISCV_SRC_ESP32C3_ESP32C3_START_H */