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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2024 Linaro Ltd.
*/
#ifndef __POWER_SEQUENCING_PROVIDER_H__
#define __POWER_SEQUENCING_PROVIDER_H__
struct device;
struct module;
struct pwrseq_device;
typedef int (*pwrseq_power_state_func)(struct pwrseq_device *);
typedef int (*pwrseq_match_func)(struct pwrseq_device *, struct device *);
/**
* struct pwrseq_unit_data - Configuration of a single power sequencing
* unit.
* @name: Name of the unit.
* @deps: Units that must be enabled before this one and disabled after it
* in the order they come in this array. Must be NULL-terminated.
* @enable: Callback running the part of the power-on sequence provided by
* this unit.
* @disable: Callback running the part of the power-off sequence provided
* by this unit.
*/
struct pwrseq_unit_data {
const char *name;
const struct pwrseq_unit_data **deps;
pwrseq_power_state_func enable;
pwrseq_power_state_func disable;
};
/**
* struct pwrseq_target_data - Configuration of a power sequencing target.
* @name: Name of the target.
* @unit: Final unit that this target must reach in order to be considered
* enabled.
* @post_enable: Callback run after the target unit has been enabled, *after*
* the state lock has been released. It's useful for implementing
* boot-up delays without blocking other users from powering up
* using the same power sequencer.
*/
struct pwrseq_target_data {
const char *name;
const struct pwrseq_unit_data *unit;
pwrseq_power_state_func post_enable;
};
/**
* struct pwrseq_config - Configuration used for registering a new provider.
* @parent: Parent device for the sequencer. Must be set.
* @owner: Module providing this device.
* @drvdata: Private driver data.
* @match: Provider callback used to match the consumer device to the sequencer.
* @targets: Array of targets for this power sequencer. Must be NULL-terminated.
*/
struct pwrseq_config {
struct device *parent;
struct module *owner;
void *drvdata;
pwrseq_match_func match;
const struct pwrseq_target_data **targets;
};
struct pwrseq_device *
pwrseq_device_register(const struct pwrseq_config *config);
void pwrseq_device_unregister(struct pwrseq_device *pwrseq);
struct pwrseq_device *
devm_pwrseq_device_register(struct device *dev,
const struct pwrseq_config *config);
void *pwrseq_device_get_drvdata(struct pwrseq_device *pwrseq);
#endif /* __POWER_SEQUENCING_PROVIDER_H__ */
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