Add spi slave dev to esp32 xtensa

boards/xtensa/esp32/common/include/esp32_board_spislavedev.h

@@ -0,0 +1,74 @@
+/****************************************************************************
+ * boards/xtensa/esp32/common/include/esp32_board_spislavedev.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.
+ *
+ ****************************************************************************/
+
+#ifndef __BOARDS_XTENSA_ESP32_COMMON_INCLUDE_ESP32_BOARD_SPISLAVEDEV_H
+#define __BOARDS_XTENSA_ESP32_COMMON_INCLUDE_ESP32_BOARD_SPISLAVEDEV_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_spislavedev_initialize
+ *
+ * Description:
+ *   Initialize SPI Slave driver and register the /dev/spislv device.
+ *
+ * Input Parameters:
+ *   bus - The SPI bus number, used to build the device path as /dev/spislvN
+ *
+ * Returned Value:
+ *   Zero (OK) is returned on success; A negated errno value is returned
+ *   to indicate the nature of any failure.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_SPI_SLAVE
+int board_spislavedev_initialize(int bus);
+#endif
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __BOARDS_XTENSA_ESP32_COMMON_INCLUDE_ESP32_BOARD_SPISLAVEDEV_H */

boards/xtensa/esp32/common/src/Make.defs

@@ -64,6 +64,10 @@ ifeq ($(CONFIG_SPI_DRIVER),y)
   CSRCS += esp32_board_spidev.c
 endif
 
+ifeq ($(CONFIG_SPI_SLAVE_DRIVER),y)
+  CSRCS += esp32_board_spislavedev.c
+endif
+
 ifeq ($(CONFIG_ESP32_SPIFLASH),y)
   CSRCS += esp32_board_spiflash.c
 endif

boards/xtensa/esp32/common/src/esp32_board_spislavedev.c

@@ -0,0 +1,82 @@
+/****************************************************************************
+ * boards/xtensa/esp32/common/src/esp32_board_spislavedev.c
+ *
+ * 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
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdio.h>
+#include <debug.h>
+#include <errno.h>
+
+#include <nuttx/spi/slave.h>
+
+#include "esp32_spi.h"
+
+#include "esp32_board_spislavedev.h"
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_spislavedev_initialize
+ *
+ * Description:
+ *   Initialize SPI Slave driver and register the /dev/spislv device.
+ *
+ * Input Parameters:
+ *   bus - The SPI bus number, used to build the device path as /dev/spislvN
+ *
+ * Returned Value:
+ *   Zero (OK) is returned on success; A negated errno value is returned
+ *   to indicate the nature of any failure.
+ *
+ ****************************************************************************/
+
+int board_spislavedev_initialize(int bus)
+{
+  int ret;
+
+  struct spi_slave_ctrlr_s *ctrlr;
+
+  spiinfo("Initializing /dev/spislv%d...\n", bus);
+
+  /* Initialize SPI Slave controller device */
+
+  ctrlr = esp32_spislv_ctrlr_initialize(bus);
+  if (ctrlr == NULL)
+    {
+      spierr("Failed to initialize SPI%d as slave.\n", bus);
+      return -ENODEV;
+    }
+
+  ret = spi_slave_register(ctrlr, bus);
+  if (ret < 0)
+    {
+      spierr("Failed to register /dev/spislv%d: %d\n", bus, ret);
+
+      esp32_spislv_ctrlr_uninitialize(ctrlr);
+    }
+
+  return ret;
+}

boards/xtensa/esp32/esp32-devkitc/src/esp32_bringup.c

@@ -153,6 +153,11 @@
 #  include "esp32_spi.h"
 #endif
 
+#ifdef CONFIG_SPI_SLAVE_DRIVER
+#  include "esp32_spi.h"
+#  include "esp32_board_spislavedev.h"
+#endif
+
 #ifdef CONFIG_LCD_BACKPACK
 #  include "esp32_lcd_backpack.h"
 #endif
@@ -702,15 +707,22 @@ int esp32_bringup(void)
     }
 #endif
 
-#ifdef CONFIG_SPI_DRIVER
-#  ifdef CONFIG_ESP32_SPI2
+#if defined(CONFIG_ESP32_SPI2) && defined(CONFIG_SPI_DRIVER)
   ret = board_spidev_initialize(ESP32_SPI2);
   if (ret < 0)
     {
       syslog(LOG_ERR, "Failed to initialize SPI%d driver: %d\n",
              ESP32_SPI2, ret);
     }
-#  endif
+#endif
+
+# if defined(CONFIG_ESP32_SPI2) && defined(CONFIG_SPI_SLAVE_DRIVER)
+  ret = board_spislavedev_initialize(ESP32_SPI2);
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "Failed to initialize SPI%d Slave driver: %d\n",
+              ESP32_SPI2, ret);
+    }
 #endif
 
 #ifdef CONFIG_WS2812