boards/arm/nrf52/arduino-nano-33ble/src/nrf52_bringup.c

/****************************************************************************
 * boards/arm/nrf52/arduino-nano-33ble/src/nrf52_bringup.c
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * 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 <sys/types.h>
#include <syslog.h>

#include <nuttx/board.h>
#include <arch/board/board.h>

#ifdef CONFIG_USERLED
#  include <nuttx/leds/userled.h>
#endif

#include "hardware/nrf52_clock.h"
#include "arm_internal.h"
#include "arduino-nano-33ble.h"

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: nrf52_i2c_register
 *
 * Description:
 *   Register one I2C drivers for the I2C tool.
 *
 ****************************************************************************/

#if defined(CONFIG_I2C) && defined(CONFIG_SYSTEM_I2CTOOL)
static void nrf52_i2c_register(int bus)
{
  struct i2c_master_s *i2c;
  int ret;

  i2c = nrf52_i2cbus_initialize(bus);
  if (i2c == NULL)
    {
      syslog(LOG_ERR, "ERROR: Failed to get I2C%d interface\n", bus);
    }
  else
    {
      ret = i2c_register(i2c, bus);
      if (ret < 0)
        {
          syslog(LOG_ERR, "ERROR: Failed to register I2C%d driver: %d\n",
                 bus, ret);
          nrf52_i2cbus_uninitialize(i2c);
        }
    }
}
#endif

/****************************************************************************
 * Name: nrf52_i2ctool
 *
 * Description:
 *   Register I2C drivers for the I2C tool.
 *
 ****************************************************************************/

#if defined(CONFIG_I2C) && defined(CONFIG_SYSTEM_I2CTOOL)
static void nrf52_i2ctool(void)
{
#ifdef CONFIG_NRF52_I2C0
  nrf52_i2c_register(0);
#endif
#ifdef CONFIG_NRF52_I2C1
  nrf52_i2c_register(1);
#endif
}
#endif

/****************************************************************************
 * Name: nrf52_bringup
 *
 * Description:
 *   Perform architecture-specific initialization
 *
 *   CONFIG_BOARD_LATE_INITIALIZE=y :
 *     Called from board_late_initialize().
 *
 *   CONFIG_BOARD_LATE_INITIALIZE=n && CONFIG_BOARDCTL=y :
 *     Called from the NSH library
 *
 ****************************************************************************/

int nrf52_bringup(void)
{
  int ret;

#ifdef CONFIG_USERLED
  /* Register the LED driver */

  ret = userled_lower_initialize(CONFIG_EXAMPLES_LEDS_DEVPATH);
  if (ret < 0)
    {
      syslog(LOG_ERR, "ERROR: userled_lower_initialize() failed: %d\n", ret);
    }
#endif

#ifdef CONFIG_SENSORS
  /* Provide power to the sensors and give them time to stabilize. */

  nrf52_gpio_config(BOARD_VDD_ENV_PIN);
  up_mdelay(20);
#endif

  /* If I2C 0 is enabled and we are master, engage pullup resistor and
   * disable trace.
   */
#ifdef CONFIG_NRF52_I2C0_MASTER
  nrf52_gpio_config(BOARD_I2C0_PULLUP_PIN);
  putreg32(0, NRF52_CLOCK_TRACECONFIG);
#endif

#ifdef CONFIG_SENSORS_LSM9DS1
  ret = nrf52_lsm9ds1_initialize();
  if (ret < 0)
    {
      syslog(LOG_ERR,
             "ERROR: Failed to initialize LSM9DS1 driver: %d\n",
             ret);
    }
#endif /* CONFIG_SENSORS_LSM6DSL */

  UNUSED(ret);
  return OK;
}