atsam-spi.h

/* SPDX-License-Identifier: BSD-2-Clause */
 
/*
 * Copyright (c) 2016 embedded brains GmbH & Co. KG
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef LIBBSP_ARM_ATSAM_ATSAM_SPI_H
#define LIBBSP_ARM_ATSAM_ATSAM_SPI_H
 
#include <libchip/chip.h>
 
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
 
typedef struct {
  uint8_t     spi_peripheral_id;
  const Pin  *pins;
  Spi        *spi_regs;
  size_t      pin_count;
  bool        chip_select_decode;
 
  /* Delay before SCLK in ns */
  uint32_t    dlybs_in_ns[4];
 
  /* Delay before consecutive word transfers in ns */
  uint32_t    dlybct_in_ns[4];
} atsam_spi_config;
 
int spi_bus_register_atsam(
  const char *bus_path,
  const atsam_spi_config *config
);
 
#ifdef __cplusplus
}
#endif /* __cplusplus */
 
#endif /* LIBBSP_ARM_ATSAM_ATSAM_SPI_H */