Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
3f0c8206 MS |
2 | #ifndef __OF_RESERVED_MEM_H |
3 | #define __OF_RESERVED_MEM_H | |
4 | ||
59ce4039 | 5 | #include <linux/device.h> |
4a470f00 | 6 | #include <linux/of.h> |
59ce4039 | 7 | |
f618c470 MS |
8 | struct of_phandle_args; |
9 | struct reserved_mem_ops; | |
10 | ||
3f0c8206 MS |
11 | struct reserved_mem { |
12 | const char *name; | |
13 | unsigned long fdt_node; | |
f618c470 | 14 | const struct reserved_mem_ops *ops; |
3f0c8206 MS |
15 | phys_addr_t base; |
16 | phys_addr_t size; | |
f618c470 MS |
17 | void *priv; |
18 | }; | |
19 | ||
20 | struct reserved_mem_ops { | |
47f29df7 | 21 | int (*device_init)(struct reserved_mem *rmem, |
f618c470 MS |
22 | struct device *dev); |
23 | void (*device_release)(struct reserved_mem *rmem, | |
24 | struct device *dev); | |
3f0c8206 MS |
25 | }; |
26 | ||
9dd31075 RH |
27 | typedef int (*reservedmem_of_init_fn)(struct reserved_mem *rmem); |
28 | ||
67a066b3 DO |
29 | #ifdef CONFIG_OF_RESERVED_MEM |
30 | ||
54196ccb RH |
31 | #define RESERVEDMEM_OF_DECLARE(name, compat, init) \ |
32 | _OF_DECLARE(reservedmem, name, compat, init, reservedmem_of_init_fn) | |
f618c470 | 33 | |
59ce4039 MS |
34 | int of_reserved_mem_device_init_by_idx(struct device *dev, |
35 | struct device_node *np, int idx); | |
0da0e316 TR |
36 | int of_reserved_mem_device_init_by_name(struct device *dev, |
37 | struct device_node *np, | |
38 | const char *name); | |
9dcfee01 MS |
39 | void of_reserved_mem_device_release(struct device *dev); |
40 | ||
eb297bc7 | 41 | struct reserved_mem *of_reserved_mem_lookup(struct device_node *np); |
3f0c8206 | 42 | #else |
67a066b3 DO |
43 | |
44 | #define RESERVEDMEM_OF_DECLARE(name, compat, init) \ | |
45 | _OF_DECLARE_STUB(reservedmem, name, compat, init, reservedmem_of_init_fn) | |
46 | ||
59ce4039 MS |
47 | static inline int of_reserved_mem_device_init_by_idx(struct device *dev, |
48 | struct device_node *np, int idx) | |
47f29df7 MS |
49 | { |
50 | return -ENOSYS; | |
51 | } | |
0da0e316 TR |
52 | |
53 | static inline int of_reserved_mem_device_init_by_name(struct device *dev, | |
54 | struct device_node *np, | |
55 | const char *name) | |
56 | { | |
57 | return -ENOSYS; | |
58 | } | |
59 | ||
9dcfee01 MS |
60 | static inline void of_reserved_mem_device_release(struct device *pdev) { } |
61 | ||
eb297bc7 BA |
62 | static inline struct reserved_mem *of_reserved_mem_lookup(struct device_node *np) |
63 | { | |
64 | return NULL; | |
65 | } | |
3f0c8206 MS |
66 | #endif |
67 | ||
59ce4039 MS |
68 | /** |
69 | * of_reserved_mem_device_init() - assign reserved memory region to given device | |
70 | * @dev: Pointer to the device to configure | |
71 | * | |
72 | * This function assigns respective DMA-mapping operations based on the first | |
73 | * reserved memory region specified by 'memory-region' property in device tree | |
74 | * node of the given device. | |
75 | * | |
76 | * Returns error code or zero on success. | |
77 | */ | |
78 | static inline int of_reserved_mem_device_init(struct device *dev) | |
79 | { | |
80 | return of_reserved_mem_device_init_by_idx(dev, dev->of_node, 0); | |
81 | } | |
82 | ||
3f0c8206 | 83 | #endif /* __OF_RESERVED_MEM_H */ |