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10b4dc5208
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>
40 lines
1.0 KiB
C
40 lines
1.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2018 Álvaro Fernández Rojas <noltari@gmail.com>
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* Copyright (C) 2015 Texas Instruments Incorporated <www.ti.com>
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* Written by Mugunthan V N <mugunthanvnm@ti.com>
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*
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*/
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#ifndef _DMA_UCLASS_H
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#define _DMA_UCLASS_H
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/* See dma.h for background documentation. */
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#include <dma.h>
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/*
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* struct dma_ops - Driver model DMA operations
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*
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* The uclass interface is implemented by all DMA devices which use
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* driver model.
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*/
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struct dma_ops {
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/**
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* transfer() - Issue a DMA transfer. The implementation must
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* wait until the transfer is done.
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*
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* @dev: The DMA device
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* @direction: direction of data transfer (should be one from
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* enum dma_direction)
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* @dst: The destination pointer.
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* @src: The source pointer.
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* @len: Length of the data to be copied (number of bytes).
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* @return zero on success, or -ve error code.
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*/
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int (*transfer)(struct udevice *dev, int direction, void *dst,
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void *src, size_t len);
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};
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#endif /* _DMA_UCLASS_H */
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