include/linux/dtpm.h

   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