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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879/* 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 *);
#define PWRSEQ_NO_MATCH 0#define PWRSEQ_MATCH_OK 1
/** * 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__ */