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c404c64d64
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
73 lines
1.5 KiB
C
73 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2020 Linaro Ltd
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*
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* Author: Daniel Lezcano <daniel.lezcano@linaro.org>
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*/
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#ifndef ___DTPM_H__
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#define ___DTPM_H__
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#include <linux/powercap.h>
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#define MAX_DTPM_DESCR 8
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#define MAX_DTPM_CONSTRAINTS 1
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struct dtpm {
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struct powercap_zone zone;
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struct dtpm *parent;
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struct list_head sibling;
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struct list_head children;
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struct dtpm_ops *ops;
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unsigned long flags;
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u64 power_limit;
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u64 power_max;
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u64 power_min;
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int weight;
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};
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struct dtpm_ops {
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u64 (*set_power_uw)(struct dtpm *, u64);
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u64 (*get_power_uw)(struct dtpm *);
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int (*update_power_uw)(struct dtpm *);
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void (*release)(struct dtpm *);
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};
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struct device_node;
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struct dtpm_subsys_ops {
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const char *name;
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int (*init)(void);
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void (*exit)(void);
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int (*setup)(struct dtpm *, struct device_node *);
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};
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enum DTPM_NODE_TYPE {
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DTPM_NODE_VIRTUAL = 0,
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DTPM_NODE_DT,
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};
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struct dtpm_node {
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enum DTPM_NODE_TYPE type;
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const char *name;
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struct dtpm_node *parent;
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};
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static inline struct dtpm *to_dtpm(struct powercap_zone *zone)
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{
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return container_of(zone, struct dtpm, zone);
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}
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int dtpm_update_power(struct dtpm *dtpm);
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int dtpm_release_zone(struct powercap_zone *pcz);
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void dtpm_init(struct dtpm *dtpm, struct dtpm_ops *ops);
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void dtpm_unregister(struct dtpm *dtpm);
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int dtpm_register(const char *name, struct dtpm *dtpm, struct dtpm *parent);
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int dtpm_create_hierarchy(struct of_device_id *dtpm_match_table);
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void dtpm_destroy_hierarchy(void);
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#endif
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