mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 19:11:02 +07:00
73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
/*
|
|
* OF helpers for DMA request / controller
|
|
*
|
|
* Based on of_gpio.h
|
|
*
|
|
* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#ifndef __LINUX_OF_DMA_H
|
|
#define __LINUX_OF_DMA_H
|
|
|
|
#include <linux/of.h>
|
|
#include <linux/dmaengine.h>
|
|
|
|
struct device_node;
|
|
|
|
struct of_dma {
|
|
struct list_head of_dma_controllers;
|
|
struct device_node *of_node;
|
|
int of_dma_nbcells;
|
|
struct dma_chan *(*of_dma_xlate)
|
|
(struct of_phandle_args *, struct of_dma *);
|
|
void *of_dma_data;
|
|
};
|
|
|
|
struct of_dma_filter_info {
|
|
dma_cap_mask_t dma_cap;
|
|
dma_filter_fn filter_fn;
|
|
};
|
|
|
|
#ifdef CONFIG_OF
|
|
extern int of_dma_controller_register(struct device_node *np,
|
|
struct dma_chan *(*of_dma_xlate)
|
|
(struct of_phandle_args *, struct of_dma *),
|
|
void *data);
|
|
extern void of_dma_controller_free(struct device_node *np);
|
|
extern struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
|
|
char *name);
|
|
extern struct dma_chan *of_dma_simple_xlate(struct of_phandle_args *dma_spec,
|
|
struct of_dma *ofdma);
|
|
#else
|
|
static int of_dma_controller_register(struct device_node *np,
|
|
struct dma_chan *(*of_dma_xlate)
|
|
(struct of_phandle_args *, struct of_dma *),
|
|
void *data)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void of_dma_controller_free(struct device_node *np)
|
|
{
|
|
}
|
|
|
|
static struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
|
|
char *name)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static struct dma_chan *of_dma_simple_xlate(struct of_phandle_args *dma_spec,
|
|
struct of_dma *ofdma)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif /* __LINUX_OF_DMA_H */
|