1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* |
3 | * Copyright (c) 2018-2019, Linaro Ltd. |
4 | * Author: Georgi Djakov <georgi.djakov@linaro.org> |
5 | */ |
6 | |
7 | #ifndef __LINUX_INTERCONNECT_H |
8 | #define __LINUX_INTERCONNECT_H |
9 | |
10 | #include <linux/mutex.h> |
11 | #include <linux/types.h> |
12 | |
13 | /* macros for converting to icc units */ |
14 | #define Bps_to_icc(x) ((x) / 1000) |
15 | #define kBps_to_icc(x) (x) |
16 | #define MBps_to_icc(x) ((x) * 1000) |
17 | #define GBps_to_icc(x) ((x) * 1000 * 1000) |
18 | #define bps_to_icc(x) (1) |
19 | #define kbps_to_icc(x) ((x) / 8 + ((x) % 8 ? 1 : 0)) |
20 | #define Mbps_to_icc(x) ((x) * 1000 / 8) |
21 | #define Gbps_to_icc(x) ((x) * 1000 * 1000 / 8) |
22 | |
23 | struct icc_path; |
24 | struct device; |
25 | |
26 | /** |
27 | * struct icc_bulk_data - Data used for bulk icc operations. |
28 | * |
29 | * @path: reference to the interconnect path (internal use) |
30 | * @name: the name from the "interconnect-names" DT property |
31 | * @avg_bw: average bandwidth in icc units |
32 | * @peak_bw: peak bandwidth in icc units |
33 | */ |
34 | struct icc_bulk_data { |
35 | struct icc_path *path; |
36 | const char *name; |
37 | u32 avg_bw; |
38 | u32 peak_bw; |
39 | }; |
40 | |
41 | #if IS_ENABLED(CONFIG_INTERCONNECT) |
42 | |
43 | struct icc_path *of_icc_get(struct device *dev, const char *name); |
44 | struct icc_path *devm_of_icc_get(struct device *dev, const char *name); |
45 | int devm_of_icc_bulk_get(struct device *dev, int num_paths, struct icc_bulk_data *paths); |
46 | struct icc_path *of_icc_get_by_index(struct device *dev, int idx); |
47 | void icc_put(struct icc_path *path); |
48 | int icc_enable(struct icc_path *path); |
49 | int icc_disable(struct icc_path *path); |
50 | int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw); |
51 | void icc_set_tag(struct icc_path *path, u32 tag); |
52 | const char *icc_get_name(struct icc_path *path); |
53 | int __must_check of_icc_bulk_get(struct device *dev, int num_paths, |
54 | struct icc_bulk_data *paths); |
55 | void icc_bulk_put(int num_paths, struct icc_bulk_data *paths); |
56 | int icc_bulk_set_bw(int num_paths, const struct icc_bulk_data *paths); |
57 | int icc_bulk_enable(int num_paths, const struct icc_bulk_data *paths); |
58 | void icc_bulk_disable(int num_paths, const struct icc_bulk_data *paths); |
59 | |
60 | #else |
61 | |
62 | static inline struct icc_path *of_icc_get(struct device *dev, |
63 | const char *name) |
64 | { |
65 | return NULL; |
66 | } |
67 | |
68 | static inline struct icc_path *devm_of_icc_get(struct device *dev, |
69 | const char *name) |
70 | { |
71 | return NULL; |
72 | } |
73 | |
74 | static inline struct icc_path *of_icc_get_by_index(struct device *dev, int idx) |
75 | { |
76 | return NULL; |
77 | } |
78 | |
79 | static inline void icc_put(struct icc_path *path) |
80 | { |
81 | } |
82 | |
83 | static inline int icc_enable(struct icc_path *path) |
84 | { |
85 | return 0; |
86 | } |
87 | |
88 | static inline int icc_disable(struct icc_path *path) |
89 | { |
90 | return 0; |
91 | } |
92 | |
93 | static inline int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw) |
94 | { |
95 | return 0; |
96 | } |
97 | |
98 | static inline void icc_set_tag(struct icc_path *path, u32 tag) |
99 | { |
100 | } |
101 | |
102 | static inline const char *icc_get_name(struct icc_path *path) |
103 | { |
104 | return NULL; |
105 | } |
106 | |
107 | static inline int of_icc_bulk_get(struct device *dev, int num_paths, struct icc_bulk_data *paths) |
108 | { |
109 | return 0; |
110 | } |
111 | |
112 | static inline int devm_of_icc_bulk_get(struct device *dev, int num_paths, |
113 | struct icc_bulk_data *paths) |
114 | { |
115 | return 0; |
116 | } |
117 | |
118 | static inline void icc_bulk_put(int num_paths, struct icc_bulk_data *paths) |
119 | { |
120 | } |
121 | |
122 | static inline int icc_bulk_set_bw(int num_paths, const struct icc_bulk_data *paths) |
123 | { |
124 | return 0; |
125 | } |
126 | |
127 | static inline int icc_bulk_enable(int num_paths, const struct icc_bulk_data *paths) |
128 | { |
129 | return 0; |
130 | } |
131 | |
132 | static inline void icc_bulk_disable(int num_paths, const struct icc_bulk_data *paths) |
133 | { |
134 | } |
135 | |
136 | #endif /* CONFIG_INTERCONNECT */ |
137 | |
138 | #endif /* __LINUX_INTERCONNECT_H */ |
139 | |