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 #if IS_ENABLED(CONFIG_INTERCONNECT) 27 28 struct icc_path *icc_get(struct device *dev, const int src_id, 29 const int dst_id); 30 struct icc_path *of_icc_get(struct device *dev, const char *name); 31 struct icc_path *devm_of_icc_get(struct device *dev, const char *name); 32 struct icc_path *of_icc_get_by_index(struct device *dev, int idx); 33 void icc_put(struct icc_path *path); 34 int icc_enable(struct icc_path *path); 35 int icc_disable(struct icc_path *path); 36 int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw); 37 void icc_set_tag(struct icc_path *path, u32 tag); 38 const char *icc_get_name(struct icc_path *path); 39 40 #else 41 42 static inline struct icc_path *icc_get(struct device *dev, const int src_id, 43 const int dst_id) 44 { 45 return NULL; 46 } 47 48 static inline struct icc_path *of_icc_get(struct device *dev, 49 const char *name) 50 { 51 return NULL; 52 } 53 54 static inline struct icc_path *devm_of_icc_get(struct device *dev, 55 const char *name) 56 { 57 return NULL; 58 } 59 60 static inline struct icc_path *of_icc_get_by_index(struct device *dev, int idx) 61 { 62 return NULL; 63 } 64 65 static inline void icc_put(struct icc_path *path) 66 { 67 } 68 69 static inline int icc_enable(struct icc_path *path) 70 { 71 return 0; 72 } 73 74 static inline int icc_disable(struct icc_path *path) 75 { 76 return 0; 77 } 78 79 static inline int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw) 80 { 81 return 0; 82 } 83 84 static inline void icc_set_tag(struct icc_path *path, u32 tag) 85 { 86 } 87 88 static inline const char *icc_get_name(struct icc_path *path) 89 { 90 return NULL; 91 } 92 93 #endif /* CONFIG_INTERCONNECT */ 94 95 #endif /* __LINUX_INTERCONNECT_H */ 96