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 23struct icc_path; 24struct 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 */ 34struct 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 43struct icc_path *of_icc_get(struct device *dev, const char *name); 44struct icc_path *devm_of_icc_get(struct device *dev, const char *name); 45int devm_of_icc_bulk_get(struct device *dev, int num_paths, struct icc_bulk_data *paths); 46struct icc_path *of_icc_get_by_index(struct device *dev, int idx); 47void icc_put(struct icc_path *path); 48int icc_enable(struct icc_path *path); 49int icc_disable(struct icc_path *path); 50int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw); 51void icc_set_tag(struct icc_path *path, u32 tag); 52const char *icc_get_name(struct icc_path *path); 53int __must_check of_icc_bulk_get(struct device *dev, int num_paths, 54 struct icc_bulk_data *paths); 55void icc_bulk_put(int num_paths, struct icc_bulk_data *paths); 56int icc_bulk_set_bw(int num_paths, const struct icc_bulk_data *paths); 57int icc_bulk_enable(int num_paths, const struct icc_bulk_data *paths); 58void icc_bulk_disable(int num_paths, const struct icc_bulk_data *paths); 59 60#else 61 62static inline struct icc_path *of_icc_get(struct device *dev, 63 const char *name) 64{ 65 return NULL; 66} 67 68static inline struct icc_path *devm_of_icc_get(struct device *dev, 69 const char *name) 70{ 71 return NULL; 72} 73 74static inline struct icc_path *of_icc_get_by_index(struct device *dev, int idx) 75{ 76 return NULL; 77} 78 79static inline void icc_put(struct icc_path *path) 80{ 81} 82 83static inline int icc_enable(struct icc_path *path) 84{ 85 return 0; 86} 87 88static inline int icc_disable(struct icc_path *path) 89{ 90 return 0; 91} 92 93static inline int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw) 94{ 95 return 0; 96} 97 98static inline void icc_set_tag(struct icc_path *path, u32 tag) 99{ 100} 101 102static inline const char *icc_get_name(struct icc_path *path) 103{ 104 return NULL; 105} 106 107static inline int of_icc_bulk_get(struct device *dev, int num_paths, struct icc_bulk_data *paths) 108{ 109 return 0; 110} 111 112static 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 118static inline void icc_bulk_put(int num_paths, struct icc_bulk_data *paths) 119{ 120} 121 122static inline int icc_bulk_set_bw(int num_paths, const struct icc_bulk_data *paths) 123{ 124 return 0; 125} 126 127static inline int icc_bulk_enable(int num_paths, const struct icc_bulk_data *paths) 128{ 129 return 0; 130} 131 132static 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