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