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 void *private; 27 }; 28 29 struct dtpm_ops { 30 u64 (*set_power_uw)(struct dtpm *, u64); 31 u64 (*get_power_uw)(struct dtpm *); 32 void (*release)(struct dtpm *); 33 }; 34 35 struct dtpm_descr; 36 37 typedef int (*dtpm_init_t)(struct dtpm_descr *); 38 39 struct dtpm_descr { 40 struct dtpm *parent; 41 const char *name; 42 dtpm_init_t init; 43 }; 44 45 /* Init section thermal table */ 46 extern struct dtpm_descr *__dtpm_table[]; 47 extern struct dtpm_descr *__dtpm_table_end[]; 48 49 #define DTPM_TABLE_ENTRY(name) \ 50 static typeof(name) *__dtpm_table_entry_##name \ 51 __used __section("__dtpm_table") = &name 52 53 #define DTPM_DECLARE(name) DTPM_TABLE_ENTRY(name) 54 55 #define for_each_dtpm_table(__dtpm) \ 56 for (__dtpm = __dtpm_table; \ 57 __dtpm < __dtpm_table_end; \ 58 __dtpm++) 59 60 static inline struct dtpm *to_dtpm(struct powercap_zone *zone) 61 { 62 return container_of(zone, struct dtpm, zone); 63 } 64 65 int dtpm_update_power(struct dtpm *dtpm, u64 power_min, u64 power_max); 66 67 int dtpm_release_zone(struct powercap_zone *pcz); 68 69 struct dtpm *dtpm_alloc(struct dtpm_ops *ops); 70 71 void dtpm_unregister(struct dtpm *dtpm); 72 73 int dtpm_register(const char *name, struct dtpm *dtpm, struct dtpm *parent); 74 75 int dtpm_register_cpu(struct dtpm *parent); 76 77 #endif 78