blob: 069d9f5a609ea6e4087c554b017807237bf69ac3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
/* 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_ */
|
