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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _MXS_DMA_H_ #define _MXS_DMA_H_ #include <linux/dmaengine.h> #define MXS_DMA_CTRL_WAIT4END BIT(31) #define MXS_DMA_CTRL_WAIT4RDY BIT(30) /* * The mxs dmaengine can do PIO transfers. We pass a pointer to the PIO words * in the second argument to dmaengine_prep_slave_sg when the direction is * set to DMA_TRANS_NONE. To make this clear and to prevent users from doing * the error prone casting we have this wrapper function */ static inline struct dma_async_tx_descriptor *mxs_dmaengine_prep_pio( struct dma_chan *chan, u32 *pio, unsigned int npio, enum dma_transfer_direction dir, unsigned long flags) { return dmaengine_prep_slave_sg(chan, (struct scatterlist *)pio, npio, dir, flags); } #endif /* _MXS_DMA_H_ */