/* SPDX-License-Identifier: GPL-2.0+ */ /* * Copyright (C) 2018 Exceet Electronics GmbH * Copyright (C) 2018 Bootlin * * Author: Boris Brezillon <boris.brezillon@bootlin.com> * * Helpers needed by the spi or spi-mem logic. Should not be used outside of * spi-mem.c and spi.c. */ #ifndef __LINUX_SPI_INTERNALS_H #define __LINUX_SPI_INTERNALS_H #include <linux/device.h> #include <linux/dma-direction.h> #include <linux/scatterlist.h> #include <linux/spi/spi.h> void spi_flush_queue(struct spi_controller *ctrl); #ifdef CONFIG_HAS_DMA int spi_map_buf(struct spi_controller *ctlr, struct device *dev, struct sg_table *sgt, void *buf, size_t len, enum dma_data_direction dir); void spi_unmap_buf(struct spi_controller *ctlr, struct device *dev, struct sg_table *sgt, enum dma_data_direction dir); #else /* !CONFIG_HAS_DMA */ static inline int spi_map_buf(struct spi_controller *ctlr, struct device *dev, struct sg_table *sgt, void *buf, size_t len, enum dma_data_direction dir) { return -EINVAL; } static inline void spi_unmap_buf(struct spi_controller *ctlr, struct device *dev, struct sg_table *sgt, enum dma_data_direction dir) { } #endif /* CONFIG_HAS_DMA */ #endif /* __LINUX_SPI_INTERNALS_H */