82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
/****************************************************************************
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* boards/risc-v/esp32c3/common/src/esp32c3_board_spidev.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdio.h>
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#include <debug.h>
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#include <errno.h>
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#include <nuttx/spi/spi_transfer.h>
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#include "esp32c3_spi.h"
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#include "esp32c3_board_spidev.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: board_spidev_initialize
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*
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* Description:
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* Initialize SPI driver and register the /dev/spi device.
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*
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* Input Parameters:
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* bus - The SPI bus number, used to build the device path as /dev/spiN
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*
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* Returned Value:
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* Zero (OK) is returned on success; A negated errno value is returned
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* to indicate the nature of any failure.
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*
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****************************************************************************/
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int board_spidev_initialize(int port)
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{
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int ret;
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struct spi_dev_s *spi;
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syslog(LOG_INFO, "Initializing /dev/spi%d...\n", port);
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/* Initialize SPI device */
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spi = esp32c3_spibus_initialize(port);
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if (spi == NULL)
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{
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syslog(LOG_ERR, "Failed to initialize SPI%d.\n", port);
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return -ENODEV;
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}
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ret = spi_register(spi, port);
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if (ret < 0)
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{
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syslog(LOG_ERR, "Failed to register /dev/spi%d: %d\n", port, ret);
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esp32c3_spibus_uninitialize(spi);
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}
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return ret;
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}
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