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1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __OF_RESERVED_MEM_H
3 #define __OF_RESERVED_MEM_H
5 #include <linux/device.h>
8 struct of_phandle_args
;
9 struct reserved_mem_ops
;
13 unsigned long fdt_node
;
14 unsigned long phandle
;
15 const struct reserved_mem_ops
*ops
;
21 struct reserved_mem_ops
{
22 int (*device_init
)(struct reserved_mem
*rmem
,
24 void (*device_release
)(struct reserved_mem
*rmem
,
28 typedef int (*reservedmem_of_init_fn
)(struct reserved_mem
*rmem
);
30 #define RESERVEDMEM_OF_DECLARE(name, compat, init) \
31 _OF_DECLARE(reservedmem, name, compat, init, reservedmem_of_init_fn)
33 #ifdef CONFIG_OF_RESERVED_MEM
35 int of_reserved_mem_device_init_by_idx(struct device
*dev
,
36 struct device_node
*np
, int idx
);
37 int of_reserved_mem_device_init_by_name(struct device
*dev
,
38 struct device_node
*np
,
40 void of_reserved_mem_device_release(struct device
*dev
);
42 void fdt_init_reserved_mem(void);
43 void fdt_reserved_mem_save_node(unsigned long node
, const char *uname
,
44 phys_addr_t base
, phys_addr_t size
);
45 struct reserved_mem
*of_reserved_mem_lookup(struct device_node
*np
);
47 static inline int of_reserved_mem_device_init_by_idx(struct device
*dev
,
48 struct device_node
*np
, int idx
)
53 static inline int of_reserved_mem_device_init_by_name(struct device
*dev
,
54 struct device_node
*np
,
60 static inline void of_reserved_mem_device_release(struct device
*pdev
) { }
62 static inline void fdt_init_reserved_mem(void) { }
63 static inline void fdt_reserved_mem_save_node(unsigned long node
,
64 const char *uname
, phys_addr_t base
, phys_addr_t size
) { }
65 static inline struct reserved_mem
*of_reserved_mem_lookup(struct device_node
*np
)
72 * of_reserved_mem_device_init() - assign reserved memory region to given device
73 * @dev: Pointer to the device to configure
75 * This function assigns respective DMA-mapping operations based on the first
76 * reserved memory region specified by 'memory-region' property in device tree
77 * node of the given device.
79 * Returns error code or zero on success.
81 static inline int of_reserved_mem_device_init(struct device
*dev
)
83 return of_reserved_mem_device_init_by_idx(dev
, dev
->of_node
, 0);
86 #endif /* __OF_RESERVED_MEM_H */