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;
24 struct dma_chan *(*of_dma_xlate)
25 (struct of_phandle_args *, struct of_dma *);
29 struct of_dma_filter_info {
30 dma_cap_mask_t dma_cap;
31 dma_filter_fn filter_fn;
35 extern int of_dma_controller_register(struct device_node *np,
36 struct dma_chan *(*of_dma_xlate)
37 (struct of_phandle_args *, struct of_dma *),
39 extern void of_dma_controller_free(struct device_node *np);
40 extern struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
42 extern struct dma_chan *of_dma_simple_xlate(struct of_phandle_args *dma_spec,
43 struct of_dma *ofdma);
45 static inline int of_dma_controller_register(struct device_node *np,
46 struct dma_chan *(*of_dma_xlate)
47 (struct of_phandle_args *, struct of_dma *),
53 static inline void of_dma_controller_free(struct device_node *np)
57 static inline struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
63 static inline struct dma_chan *of_dma_simple_xlate(struct of_phandle_args *dma_spec,
71 #endif /* __LINUX_OF_DMA_H */