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 
to_dtpm(struct powercap_zone * zone)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