From: Álvaro Fernández Rojas noltari@gmail.com
Move dma_ops to a separate header file, following other uclass implementations. While doing so, this patch also improves dma_ops documentation.
Reviewed-by: Simon Glass sjg@chromium.org Signed-off-by: Álvaro Fernández Rojas noltari@gmail.com --- drivers/dma/dma-uclass.c | 2 +- drivers/dma/ti-edma3.c | 2 +- include/dma-uclass.h | 39 +++++++++++++++++++++++++++++++++++++++ include/dma.h | 22 ---------------------- 4 files changed, 41 insertions(+), 24 deletions(-) create mode 100644 include/dma-uclass.h
diff --git a/drivers/dma/dma-uclass.c b/drivers/dma/dma-uclass.c index a33f7d5..6c3506c 100644 --- a/drivers/dma/dma-uclass.c +++ b/drivers/dma/dma-uclass.c @@ -9,10 +9,10 @@ */
#include <common.h> -#include <dma.h> #include <dm.h> #include <dm/uclass-internal.h> #include <dm/device-internal.h> +#include <dma-uclass.h> #include <errno.h>
int dma_get_device(u32 transfer_type, struct udevice **devp) diff --git a/drivers/dma/ti-edma3.c b/drivers/dma/ti-edma3.c index 2131e10..7e11b13 100644 --- a/drivers/dma/ti-edma3.c +++ b/drivers/dma/ti-edma3.c @@ -11,7 +11,7 @@ #include <asm/io.h> #include <common.h> #include <dm.h> -#include <dma.h> +#include <dma-uclass.h> #include <asm/omap_common.h> #include <asm/ti-common/ti-edma3.h>
diff --git a/include/dma-uclass.h b/include/dma-uclass.h new file mode 100644 index 0000000..c9308c8 --- /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) 2018 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 50e9652..97fa0cf 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