1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2020 Linaro Ltd 4 * 5 * Author: Daniel Lezcano <daniel.lezcano@linaro.org> 6 */ 7 #ifndef ___DTPM_H__ 8 #define ___DTPM_H__ 9 10 #include <linux/powercap.h> 11 12 #define MAX_DTPM_DESCR 8 13 #define MAX_DTPM_CONSTRAINTS 1 14 15 struct dtpm { 16 struct powercap_zone zone; 17 struct dtpm *parent; 18 struct list_head sibling; 19 struct list_head children; 20 struct dtpm_ops *ops; 21 unsigned long flags; 22 u64 power_limit; 23 u64 power_max; 24 u64 power_min; 25 int weight; 26 }; 27 28 struct dtpm_ops { 29 u64 (*set_power_uw)(struct dtpm *, u64); 30 u64 (*get_power_uw)(struct dtpm *); 31 int (*update_power_uw)(struct dtpm *); 32 void (*release)(struct dtpm *); 33 }; 34 35 struct device_node; 36 37 struct dtpm_subsys_ops { 38 const char *name; 39 int (*init)(void); 40 void (*exit)(void); 41 int (*setup)(struct dtpm *, struct device_node *); 42 }; 43 44 enum DTPM_NODE_TYPE { 45 DTPM_NODE_VIRTUAL = 0, 46 DTPM_NODE_DT, 47 }; 48 49 struct dtpm_node { 50 enum DTPM_NODE_TYPE type; 51 const char *name; 52 struct dtpm_node *parent; 53 }; 54 55 static inline struct dtpm *to_dtpm(struct powercap_zone *zone) 56 { 57 return container_of(zone, struct dtpm, zone); 58 } 59 60 int dtpm_update_power(struct dtpm *dtpm); 61 62 int dtpm_release_zone(struct powercap_zone *pcz); 63 64 void dtpm_init(struct dtpm *dtpm, struct dtpm_ops *ops); 65 66 void dtpm_unregister(struct dtpm *dtpm); 67 68 int dtpm_register(const char *name, struct dtpm *dtpm, struct dtpm *parent); 69 70 int dtpm_create_hierarchy(struct of_device_id *dtpm_match_table); 71 72 void dtpm_destroy_hierarchy(void); 73 #endif 74