spi.h

Go to the documentation of this file.

/* SPDX-License-Identifier: GPL-2.0+-with-RTEMS-exception */
 
/*
 *  Copyright (c) 2014-2015 Andre Marques <andre.lousa.marques at gmail.com>
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.org/license/LICENSE.
 */
 
#ifndef LIBBSP_ARM_RASPBERRYPI_SPI_H
#define LIBBSP_ARM_RASPBERRYPI_SPI_H
 
#include <rtems/libi2c.h>
 
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
 
/* TODO: It would be nice if this value could be probed at startup, probably
 *       using the Mailbox interface since the usual way of setting this on
 *       the hardware is through a "config.txt" text file on the SD card.
 *       Having this setup on the configure.ac script would require changing
 *       the same setting on two different places. */
#define GPU_CORE_CLOCK_RATE 250000000
 
extern int rpi_spi_init(bool bidirectional_mode);
 
#ifdef __cplusplus
}
#endif /* __cplusplus */
 
#endif /* LIBBSP_ARM_RASPBERRYPI_SPI_H */