2 * OF helpers for DMA request / controller
6 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #ifndef __LINUX_OF_DMA_H
14 #define __LINUX_OF_DMA_H
17 #include <linux/dmaengine.h>
22 struct list_head of_dma_controllers
;
23 struct device_node
*of_node
;
25 struct dma_chan
*(*of_dma_xlate
)
26 (struct of_phandle_args
*, struct of_dma
*);
30 struct of_dma_filter_info
{
31 dma_cap_mask_t dma_cap
;
32 dma_filter_fn filter_fn
;
36 extern int of_dma_controller_register(struct device_node
*np
,
37 struct dma_chan
*(*of_dma_xlate
)
38 (struct of_phandle_args
*, struct of_dma
*),
40 extern void of_dma_controller_free(struct device_node
*np
);
41 extern struct dma_chan
*of_dma_request_slave_channel(struct device_node
*np
,
43 extern struct dma_chan
*of_dma_simple_xlate(struct of_phandle_args
*dma_spec
,
44 struct of_dma
*ofdma
);
46 static inline int of_dma_controller_register(struct device_node
*np
,
47 struct dma_chan
*(*of_dma_xlate
)
48 (struct of_phandle_args
*, struct of_dma
*),
54 static inline void of_dma_controller_free(struct device_node
*np
)
58 static inline struct dma_chan
*of_dma_request_slave_channel(struct device_node
*np
,
64 static inline struct dma_chan
*of_dma_simple_xlate(struct of_phandle_args
*dma_spec
,
72 #endif /* __LINUX_OF_DMA_H */