diff options
| author | Álvaro Fernández Rojas <noltari@gmail.com> | 2018-11-28 19:17:49 +0100 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2018-12-07 08:13:45 -0500 |
| commit | 10b4dc520811fdfc5a31f6067be2b0cd0753998d (patch) | |
| tree | c5dd61f53ac06d1e2e010ed91a3f741f81bea398 /include | |
| parent | 205b010caf8d07e95c49efcbe15cad3fc5c8f31f (diff) | |
| download | u-boot-10b4dc520811fdfc5a31f6067be2b0cd0753998d.tar.gz | |
dma: move dma_ops to dma-uclass.h
Move dma_ops to a separate header file, following other uclass
implementations. While doing so, this patch also improves dma_ops
documentation.
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/dma-uclass.h | 39 | ||||
| -rw-r--r-- | include/dma.h | 22 |
2 files changed, 39 insertions, 22 deletions
diff --git a/include/dma-uclass.h b/include/dma-uclass.h new file mode 100644 index 0000000000..7bec5d3399 --- /dev/null +++ b/include/dma-uclass.h @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2018 Álvaro Fernández Rojas <noltari@gmail.com> + * Copyright (C) 2015 Texas Instruments Incorporated <www.ti.com> + * Written by Mugunthan V N <mugunthanvnm@ti.com> + * + */ + +#ifndef _DMA_UCLASS_H +#define _DMA_UCLASS_H + +/* See dma.h for background documentation. */ + +#include <dma.h> + +/* + * struct dma_ops - Driver model DMA operations + * + * The uclass interface is implemented by all DMA devices which use + * driver model. + */ +struct dma_ops { + /** + * transfer() - Issue a DMA transfer. The implementation must + * wait until the transfer is done. + * + * @dev: The DMA device + * @direction: direction of data transfer (should be one from + * enum dma_direction) + * @dst: The destination pointer. + * @src: The source pointer. + * @len: Length of the data to be copied (number of bytes). + * @return zero on success, or -ve error code. + */ + int (*transfer)(struct udevice *dev, int direction, void *dst, + void *src, size_t len); +}; + +#endif /* _DMA_UCLASS_H */ diff --git a/include/dma.h b/include/dma.h index 50e965241c..97fa0cf695 100644 --- a/include/dma.h +++ b/include/dma.h @@ -27,28 +27,6 @@ enum dma_direction { #define DMA_SUPPORTS_DEV_TO_DEV BIT(3) /* - * struct dma_ops - Driver model DMA operations - * - * The uclass interface is implemented by all DMA devices which use - * driver model. - */ -struct dma_ops { - /* - * Get the current timer count - * - * @dev: The DMA device - * @direction: direction of data transfer should be one from - enum dma_direction - * @dst: Destination pointer - * @src: Source pointer - * @len: Length of the data to be copied. - * @return: 0 if OK, -ve on error - */ - int (*transfer)(struct udevice *dev, int direction, void *dst, - void *src, size_t len); -}; - -/* * struct dma_dev_priv - information about a device used by the uclass * * @supported: mode of transfers that DMA can support, should be |