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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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ceeeb99cd8
The mxs dma driver uses the flags parameter in dmaengine_prep_slave_sg() for custom flags, but still uses the dmaengine specific names of the flags. Do a little bit better and at least give the flag a custom name. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Vinod Koul <vkoul@kernel.org> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
24 lines
760 B
C
24 lines
760 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _MXS_DMA_H_
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#define _MXS_DMA_H_
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#include <linux/dmaengine.h>
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#define MXS_DMA_CTRL_WAIT4END BIT(31)
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/*
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* The mxs dmaengine can do PIO transfers. We pass a pointer to the PIO words
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* in the second argument to dmaengine_prep_slave_sg when the direction is
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* set to DMA_TRANS_NONE. To make this clear and to prevent users from doing
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* the error prone casting we have this wrapper function
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*/
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static inline struct dma_async_tx_descriptor *mxs_dmaengine_prep_pio(
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struct dma_chan *chan, u32 *pio, unsigned int npio,
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enum dma_transfer_direction dir, unsigned long flags)
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{
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return dmaengine_prep_slave_sg(chan, (struct scatterlist *)pio, npio,
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dir, flags);
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}
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#endif /* _MXS_DMA_H_ */
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