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 };
  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