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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 | ||
988f259b BB |
20 | void spi_flush_queue(struct spi_controller *ctrl); |
21 | ||
46336966 BB |
22 | #ifdef CONFIG_HAS_DMA |
23 | int 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); | |
26 | void 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 */ | |
29 | static 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 | ||
36 | static 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 */ |