aa581fe5ce
fixes for errors reported by the nxstyle tool Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
123 lines
3.6 KiB
C
123 lines
3.6 KiB
C
/****************************************************************************
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* apps/system/spi/spi_devif.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 <sys/stat.h>
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#include <sys/ioctl.h>
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#include <stdbool.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <nuttx/spi/spi_transfer.h>
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#include "spitool.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Device naming */
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#define DEVNAME_FMT "/dev/spi%d"
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#define DEVNAME_FMTLEN (8 + 3 + 1)
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static char g_devname[DEVNAME_FMTLEN];
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: spidev_path
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****************************************************************************/
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FAR char *spidev_path(int bus)
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{
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snprintf(g_devname, DEVNAME_FMTLEN, DEVNAME_FMT, bus);
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return g_devname;
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}
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/****************************************************************************
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* Name: spidev_exists
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****************************************************************************/
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bool spidev_exists(int bus)
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{
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struct stat buf;
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FAR char *devpath;
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int ret;
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/* Get the device path */
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devpath = spidev_path(bus);
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/* Check if something exists at that path */
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ret = stat(devpath, &buf);
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if (ret >= 0)
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{
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/* Return TRUE only if it is a character driver */
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if (S_ISCHR(buf.st_mode))
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{
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return true;
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}
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}
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return false;
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}
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/****************************************************************************
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* Name: spidev_open
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****************************************************************************/
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int spidev_open(int bus)
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{
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FAR char *devpath;
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/* Get the device path */
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devpath = spidev_path(bus);
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/* Open the file for read-only access (we need only IOCTLs) */
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return open(devpath, O_RDONLY);
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}
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/****************************************************************************
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* Name: spidev_transfer
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****************************************************************************/
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int spidev_transfer(int fd, FAR struct spi_sequence_s *seq)
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{
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/* Perform the IOCTL */
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return ioctl(fd, SPIIOC_TRANSFER, (unsigned long)((uintptr_t)seq));
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}
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