linux-stable/include/linux/dtpm.h
Daniel Lezcano c404c64d64 powercap/dtpm: Destroy hierarchy function
The hierarchy creation function exits but without a destroy hierarchy
function. Due to that, the modules creating the hierarchy can not be
unloaded properly because they don't have an exit callback.

Provide the dtpm_destroy_hierarchy() function to remove the previously
created hierarchy.

The function relies on all the release mechanisms implemented by the
underlying powercap framework.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20220130210210.549877-4-daniel.lezcano@linaro.org
2022-02-23 19:45:40 +01:00

73 lines
1.5 KiB
C

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2020 Linaro Ltd
*
* Author: Daniel Lezcano <daniel.lezcano@linaro.org>
*/
#ifndef ___DTPM_H__
#define ___DTPM_H__
#include <linux/powercap.h>
#define MAX_DTPM_DESCR 8
#define MAX_DTPM_CONSTRAINTS 1
struct dtpm {
struct powercap_zone zone;
struct dtpm *parent;
struct list_head sibling;
struct list_head children;
struct dtpm_ops *ops;
unsigned long flags;
u64 power_limit;
u64 power_max;
u64 power_min;
int weight;
};
struct dtpm_ops {
u64 (*set_power_uw)(struct dtpm *, u64);
u64 (*get_power_uw)(struct dtpm *);
int (*update_power_uw)(struct dtpm *);
void (*release)(struct dtpm *);
};
struct device_node;
struct dtpm_subsys_ops {
const char *name;
int (*init)(void);
void (*exit)(void);
int (*setup)(struct dtpm *, struct device_node *);
};
enum DTPM_NODE_TYPE {
DTPM_NODE_VIRTUAL = 0,
DTPM_NODE_DT,
};
struct dtpm_node {
enum DTPM_NODE_TYPE type;
const char *name;
struct dtpm_node *parent;
};
static inline struct dtpm *to_dtpm(struct powercap_zone *zone)
{
return container_of(zone, struct dtpm, zone);
}
int dtpm_update_power(struct dtpm *dtpm);
int dtpm_release_zone(struct powercap_zone *pcz);
void dtpm_init(struct dtpm *dtpm, struct dtpm_ops *ops);
void dtpm_unregister(struct dtpm *dtpm);
int dtpm_register(const char *name, struct dtpm *dtpm, struct dtpm *parent);
int dtpm_create_hierarchy(struct of_device_id *dtpm_match_table);
void dtpm_destroy_hierarchy(void);
#endif