LXR linux/drivers/spi/internals.h

   1/* SPDX-License-Identifier: GPL-2.0+ */
   2/*
   3 * Copyright (C) 2018 Exceet Electronics GmbH
   4 * Copyright (C) 2018 Bootlin
   5 *
   6 * Author: Boris Brezillon <boris.brezillon@bootlin.com>
   7 *
   8 * Helpers needed by the spi or spi-mem logic. Should not be used outside of
   9 * spi-mem.c and spi.c.
  10 */
  11
  12#ifndef __LINUX_SPI_INTERNALS_H
  13#define __LINUX_SPI_INTERNALS_H
  14
  15#include <linux/device.h>
  16#include <linux/dma-direction.h>
  17#include <linux/scatterlist.h>
  18#include <linux/spi/spi.h>
  19
  20void spi_flush_queue(struct spi_controller *ctrl);
  21
  22#ifdef CONFIG_HAS_DMA
  23int spi_map_buf(struct spi_controller *ctlr, struct device *dev,
  24                struct sg_table *sgt, void *buf, size_t len,
  25                enum dma_data_direction dir);
  26void spi_unmap_buf(struct spi_controller *ctlr, struct device *dev,
  27                   struct sg_table *sgt, enum dma_data_direction dir);
  28#else /* !CONFIG_HAS_DMA */
  29static inline int spi_map_buf(struct spi_controller *ctlr, struct device *dev,
  30                              struct sg_table *sgt, void *buf, size_t len,
  31                              enum dma_data_direction dir)
  32{
  33        return -EINVAL;
  34}
  35
  36static inline void spi_unmap_buf(struct spi_controller *ctlr,
  37                                 struct device *dev, struct sg_table *sgt,
  38                                 enum dma_data_direction dir)
  39{
  40}
  41#endif /* CONFIG_HAS_DMA */
  42
  43#endif /* __LINUX_SPI_INTERNALS_H */
  44