esp32[c3|c6|h2]: Add I2C master support

Documentation/platforms/risc-v/esp32c3/boards/esp32c3-generic/index.rst

@@ -84,6 +84,14 @@ We can use the interrupt pin to send a signal when the interrupt fires::
 The pin is configured as a rising edge interrupt, so after issuing the
 above command, connect it to 3.3V.
 
+i2c
+---
+
+This configuration can be used to scan and manipulate I2C devices.
+You can scan for all I2C devices using the following command::
+
+    nsh> i2c dev 0x00 0x7f
+
 nsh
 ---
 

Documentation/platforms/risc-v/esp32c3/index.rst

@@ -165,7 +165,7 @@ CDC Console  Yes    Rev.3
 DMA          No
 eFuse        No
 GPIO         Yes
-I2C          No
+I2C          Yes
 LED_PWM      Yes
 RNG          No
 RSA          No

Documentation/platforms/risc-v/esp32c6/boards/esp32c6-devkitc/index.rst

@@ -119,6 +119,14 @@ We can use the interrupt pin to send a signal when the interrupt fires::
 The pin is configured as a rising edge interrupt, so after issuing the
 above command, connect it to 3.3V.
 
+i2c
+---
+
+This configuration can be used to scan and manipulate I2C devices.
+You can scan for all I2C devices using the following command::
+
+    nsh> i2c dev 0x00 0x7f
+
 nsh
 ---
 

Documentation/platforms/risc-v/esp32c6/boards/esp32c6-devkitm/index.rst

@@ -119,6 +119,14 @@ We can use the interrupt pin to send a signal when the interrupt fires::
 The pin is configured as a rising edge interrupt, so after issuing the
 above command, connect it to 3.3V.
 
+i2c
+---
+
+This configuration can be used to scan and manipulate I2C devices.
+You can scan for all I2C devices using the following command::
+
+    nsh> i2c dev 0x00 0x7f
+
 nsh
 ---
 

Documentation/platforms/risc-v/esp32c6/index.rst

@@ -147,7 +147,7 @@ ECC              No
 eFuse            No
 GPIO             Yes
 HMAC             No
-I2C              No
+I2C              Yes
 I2S              No
 Int. Temp.       No
 LED              No

Documentation/platforms/risc-v/esp32h2/boards/esp32h2-devkit/index.rst

@@ -118,6 +118,14 @@ We can use the interrupt pin to send a signal when the interrupt fires::
 The pin is configured as a rising edge interrupt, so after issuing the
 above command, connect it to 3.3V.
 
+i2c
+---
+
+This configuration can be used to scan and manipulate I2C devices.
+You can scan for all I2C devices using the following command::
+
+    nsh> i2c dev 0x00 0x7f
+
 nsh
 ---
 

Documentation/platforms/risc-v/esp32h2/index.rst

@@ -147,7 +147,7 @@ ECC              No
 eFuse            No
 GPIO             Yes
 HMAC             No
-I2C              No
+I2C              Yes
 I2S              No
 Int. Temp.       No
 LED              No

arch/risc-v/src/common/espressif/Kconfig

@@ -11,16 +11,19 @@ choice ESPRESSIF_CHIP_SERIES
 
 config ESPRESSIF_ESP32C3
 	bool "ESP32-C3"
+	select ARCH_HAVE_I2CRESET
 	---help---
 		ESP32-C3 chip with a single RISC-V IMC core, no embedded Flash memory
 
 config ESPRESSIF_ESP32C6
 	bool "ESP32-C6"
+	select ARCH_HAVE_I2CRESET
 	---help---
 		Espressif ESP32-C6 (RV32IMAC).
 
 config ESPRESSIF_ESP32H2
 	bool "ESP32-H2"
+	select ARCH_HAVE_I2CRESET
 	---help---
 		Espressif ESP32-H2 (RV32IMC).
 
@@ -314,6 +317,23 @@ config ESPRESSIF_LEDC
 	select PWM
 	select ARCH_HAVE_PWM_MULTICHAN
 
+config ESPRESSIF_I2C
+	bool
+	default n
+
+config ESPRESSIF_I2C0
+	bool "I2C 0"
+	default n
+	select ESPRESSIF_I2C
+	select I2C
+
+config ESPRESSIF_I2C1
+	bool "I2C 1"
+	default n
+	depends on ARCH_CHIP_ESP32H2
+	select ESPRESSIF_I2C
+	select I2C
+
 config ESPRESSIF_SPI
 	bool
 	default n
@@ -1208,6 +1228,47 @@ endif # PWM_MULTICHAN && PWM_NCHANNELS > 1
 
 endmenu # LEDC configuration
 
+menu "I2C Configuration"
+	depends on ESPRESSIF_I2C
+
+if ESPRESSIF_I2C0
+
+config ESPRESSIF_I2C0_SCLPIN
+	int "I2C0 SCL Pin"
+	default 6
+	range 0 21
+
+config ESPRESSIF_I2C0_SDAPIN
+	int "I2C0 SDA Pin"
+	default 5
+	range 0 21
+
+endif # ESPRESSIF_I2C0
+
+if ESPRESSIF_I2C1
+
+config ESPRESSIF_I2C1_SCLPIN
+	int "I2C1 SCL Pin"
+	default 2
+	range 0 21
+
+config ESPRESSIF_I2C1_SDAPIN
+	int "I2C1 SDA Pin"
+	default 1
+	range 0 21
+
+endif # ESPRESSIF_I2C1
+
+config ESPRESSIF_I2CTIMEOSEC
+	int "Timeout seconds"
+	default 0
+
+config ESPRESSIF_I2CTIMEOMS
+	int "Timeout milliseconds"
+	default 500
+
+endmenu # I2C configuration
+
 menu "High Resolution Timer"
 	depends on ESPRESSIF_HR_TIMER
 

arch/risc-v/src/common/espressif/Make.defs

@@ -84,6 +84,10 @@ ifeq ($(CONFIG_ESP_RMT),y)
 	endif
 endif
 
+ifeq ($(CONFIG_ESPRESSIF_I2C),y)
+	CHIP_CSRCS += esp_i2c.c
+endif
+
 ifeq ($(CONFIG_ESPRESSIF_SPI),y)
 	CHIP_CSRCS += esp_spi.c
 	ifeq ($(CONFIG_SPI_SLAVE),y)

arch/risc-v/src/common/espressif/esp_i2c.h

@@ -0,0 +1,91 @@
+/****************************************************************************
+ * arch/risc-v/src/common/espressif/esp_i2c.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_COMMON_ESPRESSIF_ESP_I2C_H
+#define __ARCH_RISCV_SRC_COMMON_ESPRESSIF_ESP_I2C_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <nuttx/i2c/i2c_master.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+#ifdef CONFIG_ESPRESSIF_I2C0
+#  define ESPRESSIF_I2C0 0
+#endif
+
+#ifdef CONFIG_ESPRESSIF_I2C1
+#  define ESPRESSIF_I2C1 1
+#endif
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: esp_i2cbus_initialize
+ *
+ * Description:
+ *   Initialize the selected I2C port. And return a unique instance of struct
+ *   struct i2c_master_s.  This function may be called to obtain multiple
+ *   instances of the interface, each of which may be set up with a
+ *   different frequency and slave address.
+ *
+ * Input Parameters:
+ *   port - Port number (for hardware that has multiple I2C interfaces)
+ *
+ * Returned Value:
+ *   Valid I2C device structure reference on success; a NULL on failure
+ *
+ ****************************************************************************/
+
+struct i2c_master_s *esp_i2cbus_initialize(int port);
+
+/****************************************************************************
+ * Name: esp_i2cbus_uninitialize
+ *
+ * Description:
+ *   De-initialize the selected I2C port, and power down the device.
+ *
+ * Input Parameters:
+ *   dev - Device structure as returned by the esp_i2cbus_initialize()
+ *
+ * Returned Value:
+ *   OK on success, ERROR when internal reference count mismatch or dev
+ *   points to invalid hardware device.
+ *
+ ****************************************************************************/
+
+int esp_i2cbus_uninitialize(struct i2c_master_s *dev);
+
+#endif /* __ASSEMBLY__ */
+#endif /* __ARCH_RISCV_SRC_COMMON_ESPRESSIF_ESP_I2C_H */

arch/risc-v/src/esp32c3/hal_esp32c3.mk

@@ -125,6 +125,7 @@ CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)mpu_hal.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)mmu_hal.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)rmt_hal.c
+CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)i2c_hal.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)spi_hal.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)spi_hal_iram.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)twai_hal.c
@@ -144,6 +145,7 @@ CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)soc$
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)soc$(DELIM)$(CHIP_SERIES)$(DELIM)gpio_periph.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)soc$(DELIM)$(CHIP_SERIES)$(DELIM)ledc_periph.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)soc$(DELIM)$(CHIP_SERIES)$(DELIM)rmt_periph.c
+CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)soc$(DELIM)$(CHIP_SERIES)$(DELIM)i2c_periph.c
 
 ifeq ($(CONFIG_ESPRESSIF_SIMPLE_BOOT),y)
   CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)nuttx$(DELIM)src$(DELIM)bootloader_banner_wrap.c

arch/risc-v/src/esp32c6/hal_esp32c6.mk

@@ -125,6 +125,7 @@ CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)ledc_hal_iram.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)lp_timer_hal.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)rmt_hal.c
+CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)i2c_hal.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)spi_hal.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)spi_hal_iram.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)timer_hal.c
@@ -149,6 +150,7 @@ CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)soc$
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)soc$(DELIM)$(CHIP_SERIES)$(DELIM)gpio_periph.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)soc$(DELIM)$(CHIP_SERIES)$(DELIM)ledc_periph.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)soc$(DELIM)$(CHIP_SERIES)$(DELIM)rmt_periph.c
+CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)soc$(DELIM)$(CHIP_SERIES)$(DELIM)i2c_periph.c
 
 ifeq ($(CONFIG_ESPRESSIF_SIMPLE_BOOT),y)
   CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)nuttx$(DELIM)src$(DELIM)bootloader_banner_wrap.c

arch/risc-v/src/esp32h2/hal_esp32h2.mk

@@ -111,6 +111,7 @@ CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)ledc_hal_iram.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)lp_timer_hal.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)rmt_hal.c
+CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)i2c_hal.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)spi_hal.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)spi_hal_iram.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)hal$(DELIM)timer_hal.c
@@ -132,6 +133,7 @@ CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)soc$
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)soc$(DELIM)$(CHIP_SERIES)$(DELIM)gpio_periph.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)soc$(DELIM)$(CHIP_SERIES)$(DELIM)ledc_periph.c
 CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)soc$(DELIM)$(CHIP_SERIES)$(DELIM)rmt_periph.c
+CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)components$(DELIM)soc$(DELIM)$(CHIP_SERIES)$(DELIM)i2c_periph.c
 
 ifeq ($(CONFIG_ESPRESSIF_SIMPLE_BOOT),y)
   CHIP_CSRCS += chip$(DELIM)$(ESP_HAL_3RDPARTY_REPO)$(DELIM)nuttx$(DELIM)src$(DELIM)bootloader_banner_wrap.c

boards/risc-v/esp32c3/common/include/esp_board_i2c.h

@@ -0,0 +1,74 @@
+/****************************************************************************
+ * boards/risc-v/esp32c3/common/include/esp_board_i2c.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_RISCV_ESP32C3_COMMON_INCLUDE_ESP_BOARD_I2C_H
+#define __BOARDS_RISCV_ESP32C3_COMMON_INCLUDE_ESP_BOARD_I2C_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_i2c_init
+ *
+ * Description:
+ *   Configure the I2C driver.
+ *
+ * Input Parameters:
+ *   None.
+ *
+ * Returned Value:
+ *   Zero (OK) is returned on success; A negated errno value is returned
+ *   to indicate the nature of any failure.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_I2C_DRIVER
+int board_i2c_init(void);
+#endif
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __BOARDS_RISCV_ESP32C3_COMMON_INCLUDE_ESP_BOARD_I2C_H */

boards/risc-v/esp32c3/common/src/Make.defs

@@ -40,6 +40,10 @@ ifeq ($(CONFIG_SPI_SLAVE_DRIVER),y)
   CSRCS += esp_board_spislavedev.c
 endif
 
+ifeq ($(CONFIG_I2C_DRIVER),y)
+  CSRCS += esp_board_i2c.c
+endif
+
 ifeq ($(CONFIG_ESPRESSIF_SPIFLASH),y)
   CSRCS += esp_board_spiflash.c
 endif

boards/risc-v/esp32c3/common/src/esp_board_i2c.c

@@ -0,0 +1,82 @@
+/****************************************************************************
+ * boards/risc-v/esp32c3/common/src/esp_board_i2c.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 <debug.h>
+#include <errno.h>
+#include <sys/types.h>
+
+#include <nuttx/i2c/i2c_master.h>
+
+#include "espressif/esp_i2c.h"
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+static int i2c_driver_init(int bus)
+{
+  struct i2c_master_s *i2c;
+  int ret;
+
+  i2c = esp_i2cbus_initialize(bus);
+  if (i2c == NULL)
+    {
+      i2cerr("Failed to get I2C%d interface\n", bus);
+      return -ENODEV;
+    }
+
+  ret = i2c_register(i2c, bus);
+  if (ret < 0)
+    {
+      i2cerr("Failed to register I2C%d driver: %d\n", bus, ret);
+      esp_i2cbus_uninitialize(i2c);
+    }
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: board_i2c_init
+ *
+ * Description:
+ *   Configure the I2C driver.
+ *
+ * Returned Value:
+ *   Zero (OK) is returned on success; A negated errno value is returned
+ *   to indicate the nature of any failure.
+ *
+ ****************************************************************************/
+
+int board_i2c_init(void)
+{
+  int ret = OK;
+
+#ifdef CONFIG_ESPRESSIF_I2C0
+  ret = i2c_driver_init(ESPRESSIF_I2C0);
+#endif
+
+  return ret;
+}

boards/risc-v/esp32c3/esp32c3-generic/configs/i2c/defconfig

@@ -0,0 +1,52 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed .config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that includes your
+# modifications.
+#
+# CONFIG_NSH_ARGCAT is not set
+# CONFIG_NSH_CMDOPT_HEXDUMP is not set
+CONFIG_ARCH="risc-v"
+CONFIG_ARCH_BOARD="esp32c3-generic"
+CONFIG_ARCH_BOARD_COMMON=y
+CONFIG_ARCH_BOARD_ESP32C3_GENERIC=y
+CONFIG_ARCH_CHIP="esp32c3"
+CONFIG_ARCH_CHIP_ESP32C3_GENERIC=y
+CONFIG_ARCH_INTERRUPTSTACK=1536
+CONFIG_ARCH_RISCV=y
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_BOARDCTL_RESET=y
+CONFIG_BOARD_LOOPSPERMSEC=15000
+CONFIG_BUILTIN=y
+CONFIG_DEV_ZERO=y
+CONFIG_ESPRESSIF_I2C0=y
+CONFIG_FS_PROCFS=y
+CONFIG_I2CTOOL_DEFFREQ=100000
+CONFIG_I2CTOOL_MAXBUS=1
+CONFIG_I2C_RESET=y
+CONFIG_I2C_TRACE=y
+CONFIG_IDLETHREAD_STACKSIZE=2048
+CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_INTELHEX_BINARY=y
+CONFIG_LIBC_PERROR_STDOUT=y
+CONFIG_LIBC_STRERROR=y
+CONFIG_NFILE_DESCRIPTORS_PER_BLOCK=6
+CONFIG_NSH_ARCHINIT=y
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_FILEIOSIZE=512
+CONFIG_NSH_READLINE=y
+CONFIG_NSH_STRERROR=y
+CONFIG_PREALLOC_TIMERS=0
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_BACKTRACE=y
+CONFIG_SCHED_WAITPID=y
+CONFIG_START_DAY=29
+CONFIG_START_MONTH=11
+CONFIG_START_YEAR=2019
+CONFIG_SYSTEM_DUMPSTACK=y
+CONFIG_SYSTEM_I2CTOOL=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_TESTING_GETPRIME=y
+CONFIG_TESTING_OSTEST=y
+CONFIG_UART0_SERIAL_CONSOLE=y

boards/risc-v/esp32c3/esp32c3-generic/src/esp32c3_bringup.c

@@ -36,6 +36,7 @@
 
 #include "esp_board_ledc.h"
 #include "esp_board_spiflash.h"
+#include "esp_board_i2c.h"
 
 #ifdef CONFIG_WATCHDOG
 #  include "espressif/esp_wdt.h"
@@ -257,6 +258,17 @@ int esp_bringup(void)
     }
 #endif
 
+#if defined(CONFIG_I2C_DRIVER)
+  /* Configure I2C peripheral interfaces */
+
+  ret = board_i2c_init();
+
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "Failed to initialize I2C driver: %d\n", ret);
+    }
+#endif
+
 #ifdef CONFIG_ESPRESSIF_TWAI
 
   /* Initialize TWAI and register the TWAI driver. */

boards/risc-v/esp32c6/common/include/esp_board_i2c.h

@@ -0,0 +1,74 @@
+/****************************************************************************
+ * boards/risc-v/esp32c6/common/include/esp_board_i2c.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_RISCV_ESP32C6_COMMON_INCLUDE_ESP_BOARD_I2C_H
+#define __BOARDS_RISCV_ESP32C3_COMMON_INCLUDE_ESP_BOARD_I2C_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_i2c_init
+ *
+ * Description:
+ *   Configure the I2C driver.
+ *
+ * Input Parameters:
+ *   None.
+ *
+ * Returned Value:
+ *   Zero (OK) is returned on success; A negated errno value is returned
+ *   to indicate the nature of any failure.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_I2C_DRIVER
+int board_i2c_init(void);
+#endif
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __BOARDS_RISCV_ESP32C6_COMMON_INCLUDE_ESP_BOARD_I2C_H */

boards/risc-v/esp32c6/common/src/Make.defs

@@ -40,6 +40,10 @@ ifeq ($(CONFIG_SPI_SLAVE_DRIVER),y)
   CSRCS += esp_board_spislavedev.c
 endif
 
+ifeq ($(CONFIG_I2C_DRIVER),y)
+  CSRCS += esp_board_i2c.c
+endif
+
 ifeq ($(CONFIG_ESPRESSIF_SPIFLASH),y)
   CSRCS += esp_board_spiflash.c
 endif

boards/risc-v/esp32c6/common/src/esp_board_i2c.c

@@ -0,0 +1,82 @@
+/****************************************************************************
+ * boards/risc-v/esp32c6/common/src/esp_board_i2c.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 <debug.h>
+#include <errno.h>
+#include <sys/types.h>
+
+#include <nuttx/i2c/i2c_master.h>
+
+#include "espressif/esp_i2c.h"
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+static int i2c_driver_init(int bus)
+{
+  struct i2c_master_s *i2c;
+  int ret;
+
+  i2c = esp_i2cbus_initialize(bus);
+  if (i2c == NULL)
+    {
+      i2cerr("Failed to get I2C%d interface\n", bus);
+      return -ENODEV;
+    }
+
+  ret = i2c_register(i2c, bus);
+  if (ret < 0)
+    {
+      i2cerr("Failed to register I2C%d driver: %d\n", bus, ret);
+      esp_i2cbus_uninitialize(i2c);
+    }
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: board_i2c_init
+ *
+ * Description:
+ *   Configure the I2C driver.
+ *
+ * Returned Value:
+ *   Zero (OK) is returned on success; A negated errno value is returned
+ *   to indicate the nature of any failure.
+ *
+ ****************************************************************************/
+
+int board_i2c_init(void)
+{
+  int ret = OK;
+
+#ifdef CONFIG_ESPRESSIF_I2C0
+  ret = i2c_driver_init(ESPRESSIF_I2C0);
+#endif
+
+  return ret;
+}

boards/risc-v/esp32c6/esp32c6-devkitc/configs/i2c/defconfig

@@ -0,0 +1,54 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed .config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that includes your
+# modifications.
+#
+# CONFIG_NSH_ARGCAT is not set
+# CONFIG_NSH_CMDOPT_HEXDUMP is not set
+CONFIG_ARCH="risc-v"
+CONFIG_ARCH_BOARD="esp32c6-devkitc"
+CONFIG_ARCH_BOARD_COMMON=y
+CONFIG_ARCH_BOARD_ESP32C6_DEVKITC=y
+CONFIG_ARCH_CHIP="esp32c6"
+CONFIG_ARCH_CHIP_ESP32C6=y
+CONFIG_ARCH_CHIP_ESP32C6WROOM1=y
+CONFIG_ARCH_INTERRUPTSTACK=2048
+CONFIG_ARCH_RISCV=y
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_BOARDCTL_RESET=y
+CONFIG_BOARD_LOOPSPERMSEC=15000
+CONFIG_BUILTIN=y
+CONFIG_DEV_ZERO=y
+CONFIG_ESPRESSIF_ESP32C6=y
+CONFIG_ESPRESSIF_I2C0=y
+CONFIG_FS_PROCFS=y
+CONFIG_I2CTOOL_DEFFREQ=100000
+CONFIG_I2CTOOL_MAXBUS=1
+CONFIG_I2C_RESET=y
+CONFIG_I2C_TRACE=y
+CONFIG_IDLETHREAD_STACKSIZE=2048
+CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_INTELHEX_BINARY=y
+CONFIG_LIBC_PERROR_STDOUT=y
+CONFIG_LIBC_STRERROR=y
+CONFIG_NFILE_DESCRIPTORS_PER_BLOCK=6
+CONFIG_NSH_ARCHINIT=y
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_FILEIOSIZE=512
+CONFIG_NSH_READLINE=y
+CONFIG_NSH_STRERROR=y
+CONFIG_PREALLOC_TIMERS=0
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_BACKTRACE=y
+CONFIG_SCHED_WAITPID=y
+CONFIG_START_DAY=29
+CONFIG_START_MONTH=11
+CONFIG_START_YEAR=2019
+CONFIG_SYSTEM_DUMPSTACK=y
+CONFIG_SYSTEM_I2CTOOL=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_TESTING_GETPRIME=y
+CONFIG_TESTING_OSTEST=y
+CONFIG_UART0_SERIAL_CONSOLE=y

boards/risc-v/esp32c6/esp32c6-devkitc/src/esp32c6_bringup.c

@@ -36,6 +36,7 @@
 
 #include "esp_board_ledc.h"
 #include "esp_board_spiflash.h"
+#include "esp_board_i2c.h"
 
 #ifdef CONFIG_WATCHDOG
 #  include "espressif/esp_wdt.h"
@@ -226,6 +227,17 @@ int esp_bringup(void)
     }
 #endif
 
+#if defined(CONFIG_I2C_DRIVER)
+  /* Configure I2C peripheral interfaces */
+
+  ret = board_i2c_init();
+
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "Failed to initialize I2C driver: %d\n", ret);
+    }
+#endif
+
 #ifdef CONFIG_ESPRESSIF_TWAI0
 
   /* Initialize TWAI and register the TWAI driver. */

boards/risc-v/esp32c6/esp32c6-devkitm/configs/i2c/defconfig

@@ -0,0 +1,54 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed .config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that includes your
+# modifications.
+#
+# CONFIG_NSH_ARGCAT is not set
+# CONFIG_NSH_CMDOPT_HEXDUMP is not set
+CONFIG_ARCH="risc-v"
+CONFIG_ARCH_BOARD="esp32c6-devkitm"
+CONFIG_ARCH_BOARD_COMMON=y
+CONFIG_ARCH_BOARD_ESP32C6_DEVKITM=y
+CONFIG_ARCH_CHIP="esp32c6"
+CONFIG_ARCH_CHIP_ESP32C6=y
+CONFIG_ARCH_CHIP_ESP32C6MINI1=y
+CONFIG_ARCH_INTERRUPTSTACK=2048
+CONFIG_ARCH_RISCV=y
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_BOARDCTL_RESET=y
+CONFIG_BOARD_LOOPSPERMSEC=15000
+CONFIG_BUILTIN=y
+CONFIG_DEV_ZERO=y
+CONFIG_ESPRESSIF_ESP32C6=y
+CONFIG_ESPRESSIF_I2C0=y
+CONFIG_FS_PROCFS=y
+CONFIG_I2CTOOL_DEFFREQ=100000
+CONFIG_I2CTOOL_MAXBUS=1
+CONFIG_I2C_RESET=y
+CONFIG_I2C_TRACE=y
+CONFIG_IDLETHREAD_STACKSIZE=2048
+CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_INTELHEX_BINARY=y
+CONFIG_LIBC_PERROR_STDOUT=y
+CONFIG_LIBC_STRERROR=y
+CONFIG_NFILE_DESCRIPTORS_PER_BLOCK=6
+CONFIG_NSH_ARCHINIT=y
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_FILEIOSIZE=512
+CONFIG_NSH_READLINE=y
+CONFIG_NSH_STRERROR=y
+CONFIG_PREALLOC_TIMERS=0
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_BACKTRACE=y
+CONFIG_SCHED_WAITPID=y
+CONFIG_START_DAY=29
+CONFIG_START_MONTH=11
+CONFIG_START_YEAR=2019
+CONFIG_SYSTEM_DUMPSTACK=y
+CONFIG_SYSTEM_I2CTOOL=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_TESTING_GETPRIME=y
+CONFIG_TESTING_OSTEST=y
+CONFIG_UART0_SERIAL_CONSOLE=y

boards/risc-v/esp32c6/esp32c6-devkitm/src/esp32c6_bringup.c

@@ -36,6 +36,7 @@
 
 #include "esp_board_ledc.h"
 #include "esp_board_spiflash.h"
+#include "esp_board_i2c.h"
 
 #ifdef CONFIG_WATCHDOG
 #  include "espressif/esp_wdt.h"
@@ -226,6 +227,17 @@ int esp_bringup(void)
     }
 #endif
 
+#if defined(CONFIG_I2C_DRIVER)
+  /* Configure I2C peripheral interfaces */
+
+  ret = board_i2c_init();
+
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "Failed to initialize I2C driver: %d\n", ret);
+    }
+#endif
+
 #ifdef CONFIG_ESPRESSIF_TWAI0
 
   /* Initialize TWAI and register the TWAI driver. */

boards/risc-v/esp32h2/common/include/esp_board_i2c.h

@@ -0,0 +1,74 @@
+/****************************************************************************
+ * boards/risc-v/esp32h2/common/include/esp_board_i2c.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_RISCV_ESP32H2_COMMON_INCLUDE_ESP_BOARD_I2C_H
+#define __BOARDS_RISCV_ESP32H2_COMMON_INCLUDE_ESP_BOARD_I2C_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_i2c_init
+ *
+ * Description:
+ *   Configure the I2C driver.
+ *
+ * Input Parameters:
+ *   None.
+ *
+ * Returned Value:
+ *   Zero (OK) is returned on success; A negated errno value is returned
+ *   to indicate the nature of any failure.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_I2C_DRIVER
+int board_i2c_init(void);
+#endif
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __BOARDS_RISCV_ESP32H2_COMMON_INCLUDE_ESP_BOARD_I2C_H */

boards/risc-v/esp32h2/common/src/Make.defs

@@ -40,6 +40,10 @@ ifeq ($(CONFIG_SPI_SLAVE_DRIVER),y)
   CSRCS += esp_board_spislavedev.c
 endif
 
+ifeq ($(CONFIG_I2C_DRIVER),y)
+  CSRCS += esp_board_i2c.c
+endif
+
 ifeq ($(CONFIG_ESPRESSIF_SPIFLASH),y)
   CSRCS += esp_board_spiflash.c
 endif

boards/risc-v/esp32h2/common/src/esp_board_i2c.c

@@ -0,0 +1,90 @@
+/****************************************************************************
+ * boards/risc-v/esp32h2/common/src/esp_board_i2c.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 <debug.h>
+#include <errno.h>
+#include <sys/types.h>
+
+#include <nuttx/i2c/i2c_master.h>
+
+#include "espressif/esp_i2c.h"
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+static int i2c_driver_init(int bus)
+{
+  struct i2c_master_s *i2c;
+  int ret;
+
+  i2c = esp_i2cbus_initialize(bus);
+  if (i2c == NULL)
+    {
+      i2cerr("Failed to get I2C%d interface\n", bus);
+      return -ENODEV;
+    }
+
+  ret = i2c_register(i2c, bus);
+  if (ret < 0)
+    {
+      i2cerr("Failed to register I2C%d driver: %d\n", bus, ret);
+      esp_i2cbus_uninitialize(i2c);
+    }
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: board_i2c_init
+ *
+ * Description:
+ *   Configure the I2C driver.
+ *
+ * Returned Value:
+ *   Zero (OK) is returned on success; A negated errno value is returned
+ *   to indicate the nature of any failure.
+ *
+ ****************************************************************************/
+
+int board_i2c_init(void)
+{
+  int ret = OK;
+
+#ifdef CONFIG_ESPRESSIF_I2C0
+  ret = i2c_driver_init(ESPRESSIF_I2C0);
+  if (ret != OK)
+    {
+      return ret;
+    }
+#endif
+
+#ifdef CONFIG_ESPRESSIF_I2C1
+  ret = i2c_driver_init(ESPRESSIF_I2C1);
+#endif
+
+  return ret;
+}

boards/risc-v/esp32h2/esp32h2-devkit/configs/i2c/defconfig

@@ -0,0 +1,54 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed .config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that includes your
+# modifications.
+#
+# CONFIG_NSH_ARGCAT is not set
+# CONFIG_NSH_CMDOPT_HEXDUMP is not set
+CONFIG_ARCH="risc-v"
+CONFIG_ARCH_BOARD="esp32h2-devkit"
+CONFIG_ARCH_BOARD_COMMON=y
+CONFIG_ARCH_BOARD_ESP32H2_DEVKIT=y
+CONFIG_ARCH_CHIP="esp32h2"
+CONFIG_ARCH_CHIP_ESP32H2=y
+CONFIG_ARCH_INTERRUPTSTACK=2048
+CONFIG_ARCH_RISCV=y
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_BOARDCTL_RESET=y
+CONFIG_BOARD_LOOPSPERMSEC=15000
+CONFIG_BUILTIN=y
+CONFIG_DEV_ZERO=y
+CONFIG_ESPRESSIF_ESP32H2=y
+CONFIG_ESPRESSIF_I2C0=y
+CONFIG_ESPRESSIF_I2C1=y
+CONFIG_FS_PROCFS=y
+CONFIG_I2CTOOL_DEFFREQ=100000
+CONFIG_I2CTOOL_MAXBUS=1
+CONFIG_I2C_RESET=y
+CONFIG_I2C_TRACE=y
+CONFIG_IDLETHREAD_STACKSIZE=2048
+CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_INTELHEX_BINARY=y
+CONFIG_LIBC_PERROR_STDOUT=y
+CONFIG_LIBC_STRERROR=y
+CONFIG_NFILE_DESCRIPTORS_PER_BLOCK=6
+CONFIG_NSH_ARCHINIT=y
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_FILEIOSIZE=512
+CONFIG_NSH_READLINE=y
+CONFIG_NSH_STRERROR=y
+CONFIG_PREALLOC_TIMERS=0
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_BACKTRACE=y
+CONFIG_SCHED_WAITPID=y
+CONFIG_START_DAY=29
+CONFIG_START_MONTH=11
+CONFIG_START_YEAR=2019
+CONFIG_SYSTEM_DUMPSTACK=y
+CONFIG_SYSTEM_I2CTOOL=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_TESTING_GETPRIME=y
+CONFIG_TESTING_OSTEST=y
+CONFIG_UART0_SERIAL_CONSOLE=y

boards/risc-v/esp32h2/esp32h2-devkit/src/esp32h2_bringup.c

@@ -36,6 +36,7 @@
 
 #include "esp_board_ledc.h"
 #include "esp_board_spiflash.h"
+#include "esp_board_i2c.h"
 
 #ifdef CONFIG_WATCHDOG
 #  include "espressif/esp_wdt.h"
@@ -218,6 +219,17 @@ int esp_bringup(void)
     }
 #endif
 
+#if defined(CONFIG_I2C_DRIVER)
+  /* Configure I2C peripheral interfaces */
+
+  ret = board_i2c_init();
+
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "Failed to initialize I2C driver: %d\n", ret);
+    }
+#endif
+
 #ifdef CONFIG_ESPRESSIF_TWAI
 
   /* Initialize TWAI and register the TWAI driver. */