spidev_linux.h

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/*
 * Copyright (C) 2019 Frank Hessel <frank@fhessel.de>
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */
 
#ifndef SPIDEV_LINUX_H
#define SPIDEV_LINUX_H
 
#if defined(__linux__) || defined(DOXYGEN) /* Linux-only */
 
#include "periph/spi.h"
 
#include "mutex.h"
#include "periph_conf.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
enum {
    SPI_SETUP_OK          =  0,     
    SPI_SETUP_INVALID     = -1,     
};
 
typedef struct spidev_linux_conf {
    char *device_filename[SPI_MAXCS];
} spidev_linux_conf_t;
 
typedef struct spidev_linux_state {
    mutex_t lock;
    int fd[SPI_MAXCS];
} spidev_linux_state_t;
 
int spidev_linux_setup(spi_t bus, unsigned cs_id, const char *name);
 
void spidev_linux_teardown(void);
 
#ifdef __cplusplus
}
#endif
 
#else
/* Create the error in the header file as spi.c will be compiled to late to show it */
#ifdef MODULE_PERIPH_SPIDEV_LINUX
#error "MODULE periph_spidev_linux is only available on Linux"
#endif
#endif /* defined(__linux__) || defined(DOXYGEN) */
 
#endif /* SPIDEV_LINUX_H */