| Boris Brezillon | 4633696 | 2018-04-22 20:35:14 +0200 | [diff] [blame^] | 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 | |
| 20 | #ifdef CONFIG_HAS_DMA |
| 21 | int spi_map_buf(struct spi_controller *ctlr, struct device *dev, |
| 22 | struct sg_table *sgt, void *buf, size_t len, |
| 23 | enum dma_data_direction dir); |
| 24 | void spi_unmap_buf(struct spi_controller *ctlr, struct device *dev, |
| 25 | struct sg_table *sgt, enum dma_data_direction dir); |
| 26 | #else /* !CONFIG_HAS_DMA */ |
| 27 | static inline int spi_map_buf(struct spi_controller *ctlr, struct device *dev, |
| 28 | struct sg_table *sgt, void *buf, size_t len, |
| 29 | enum dma_data_direction dir) |
| 30 | { |
| 31 | return -EINVAL; |
| 32 | } |
| 33 | |
| 34 | static inline void spi_unmap_buf(struct spi_controller *ctlr, |
| 35 | struct device *dev, struct sg_table *sgt, |
| 36 | enum dma_data_direction dir) |
| 37 | { |
| 38 | } |
| 39 | #endif /* CONFIG_HAS_DMA */ |
| 40 | |
| 41 | #endif /* __LINUX_SPI_INTERNALS_H */ |