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; | |
9dcfee01 | 14 | unsigned long phandle; |
f618c470 | 15 | const struct reserved_mem_ops *ops; |
3f0c8206 MS |
16 | phys_addr_t base; |
17 | phys_addr_t size; | |
f618c470 MS |
18 | void *priv; |
19 | }; | |
20 | ||
21 | struct reserved_mem_ops { | |
47f29df7 | 22 | int (*device_init)(struct reserved_mem *rmem, |
f618c470 MS |
23 | struct device *dev); |
24 | void (*device_release)(struct reserved_mem *rmem, | |
25 | struct device *dev); | |
3f0c8206 MS |
26 | }; |
27 | ||
9dd31075 RH |
28 | typedef int (*reservedmem_of_init_fn)(struct reserved_mem *rmem); |
29 | ||
67a066b3 DO |
30 | #ifdef CONFIG_OF_RESERVED_MEM |
31 | ||
54196ccb RH |
32 | #define RESERVEDMEM_OF_DECLARE(name, compat, init) \ |
33 | _OF_DECLARE(reservedmem, name, compat, init, reservedmem_of_init_fn) | |
f618c470 | 34 | |
59ce4039 MS |
35 | int of_reserved_mem_device_init_by_idx(struct device *dev, |
36 | struct device_node *np, int idx); | |
0da0e316 TR |
37 | int of_reserved_mem_device_init_by_name(struct device *dev, |
38 | struct device_node *np, | |
39 | const char *name); | |
9dcfee01 MS |
40 | void of_reserved_mem_device_release(struct device *dev); |
41 | ||
eb297bc7 | 42 | struct reserved_mem *of_reserved_mem_lookup(struct device_node *np); |
3f0c8206 | 43 | #else |
67a066b3 DO |
44 | |
45 | #define RESERVEDMEM_OF_DECLARE(name, compat, init) \ | |
46 | _OF_DECLARE_STUB(reservedmem, name, compat, init, reservedmem_of_init_fn) | |
47 | ||
59ce4039 MS |
48 | static inline int of_reserved_mem_device_init_by_idx(struct device *dev, |
49 | struct device_node *np, int idx) | |
47f29df7 MS |
50 | { |
51 | return -ENOSYS; | |
52 | } | |
0da0e316 TR |
53 | |
54 | static inline int of_reserved_mem_device_init_by_name(struct device *dev, | |
55 | struct device_node *np, | |
56 | const char *name) | |
57 | { | |
58 | return -ENOSYS; | |
59 | } | |
60 | ||
9dcfee01 MS |
61 | static inline void of_reserved_mem_device_release(struct device *pdev) { } |
62 | ||
eb297bc7 BA |
63 | static inline struct reserved_mem *of_reserved_mem_lookup(struct device_node *np) |
64 | { | |
65 | return NULL; | |
66 | } | |
3f0c8206 MS |
67 | #endif |
68 | ||
59ce4039 MS |
69 | /** |
70 | * of_reserved_mem_device_init() - assign reserved memory region to given device | |
71 | * @dev: Pointer to the device to configure | |
72 | * | |
73 | * This function assigns respective DMA-mapping operations based on the first | |
74 | * reserved memory region specified by 'memory-region' property in device tree | |
75 | * node of the given device. | |
76 | * | |
77 | * Returns error code or zero on success. | |
78 | */ | |
79 | static inline int of_reserved_mem_device_init(struct device *dev) | |
80 | { | |
81 | return of_reserved_mem_device_init_by_idx(dev, dev->of_node, 0); | |
82 | } | |
83 | ||
3f0c8206 | 84 | #endif /* __OF_RESERVED_MEM_H */ |