regulator_handle_critical(9)

💅 regulator_handle_critical(9) 💅

okay bestie, welcome to the Kernel API Manual corner of the group chat — this is the page for regulator_handle_critical, and it is literally the emergency-vibes entry. 🫶

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💖 NAME 💖

regulator_handle_critical — Handle events for system-critical regulators. no cap, that's the whole assignment. 💅

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✨ SYNOPSIS ✨

the signature is right here, copy it exactly bestie:

void regulator_handle_critical (struct regulator_dev *rdev , unsigned
long event );

look at that void — it's giving “no return value, just main character energy.” ✨

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🫶 ARGUMENTS 🫶

two arguments, both iconic:

• rdev — the regulator device. yes, the device itself, bestie. 🔌
• event — the event being handled. the thing that just happened. 💥

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🔥 DESCRIPTION 🔥

okay so here's the tea: this function handles critical events such as under-voltage, over-current, and unknown errors for regulators deemed system-critical. on detecting such events, it triggers a hardware protection shutdown with a defined timeout.

the way that it goes straight to hardware protection shutdown with a defined timeout is highkey serious and also kind of iconic. this is not the “ignore it and hope” path — it's the protect-the-system path, periodt. 💀🔥

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🌈 SEE ALSO 🌈

the kernel file is literally ./drivers/regulator/core.c, and the whole friend group is invited — every single reference, no skips:

regulator_lock_nested(9), regulator_lock(9), regulator_unlock(9),
regulator_lock_two(9), regulator_unlock_two(9),
regulator_unlock_dependent(9), regulator_lock_dependent(9),
set_machine_constraints(9), regulator_event_work_fn(9),
regulator_event_forward_notifier(9),
register_regulator_event_forwarding(9), set_supply(9),
set_consumer_device_supply(9), regulator_dev_lookup(9),
_regulator_get_common(9), regulator_get(9), regulator_get_exclusive(9),
regulator_get_optional(9), regulator_put(9),
regulator_register_supply_alias(9),
regulator_unregister_supply_alias(9),
regulator_bulk_register_supply_alias(9),
regulator_bulk_unregister_supply_alias(9), regulator_ena_gpio_ctrl(9),
_regulator_check_status_enabled(9),
_regulator_handle_consumer_enable(9),
_regulator_handle_consumer_disable(9), regulator_enable(9),
regulator_disable(9), regulator_force_disable(9),
regulator_disable_deferred(9), regulator_is_enabled(9),
regulator_count_voltages(9), regulator_list_voltage(9),
regulator_get_regmap(9), regulator_get_hardware_vsel_register(9),
regulator_list_hardware_vsel(9), regulator_hardware_enable(9),
regulator_get_linear_step(9), regulator_is_supported_voltage(9),
regulator_set_voltage(9), regulator_set_voltage_time(9),
regulator_set_voltage_time_sel(9), regulator_sync_voltage(9),
regulator_get_voltage(9), regulator_set_current_limit(9),
regulator_get_current_limit(9), regulator_get_unclaimed_power_budget(9),
regulator_request_power_budget(9), regulator_free_power_budget(9),
regulator_set_mode(9), regulator_get_mode(9),
regulator_get_error_flags(9), regulator_set_load(9),
regulator_allow_bypass(9), regulator_register_notifier(9),
regulator_unregister_notifier(9), regulator_bulk_get(9),
regulator_bulk_enable(9), regulator_bulk_disable(9),
regulator_bulk_force_disable(9), regulator_bulk_free(9),
regulator_notifier_call_chain(9), regulator_mode_to_status(9),
regulator_register(9), regulator_unregister(9), regulator_suspend(9),
regulator_has_full_constraints(9), rdev_get_drvdata(9),
regulator_get_drvdata(9), regulator_set_drvdata(9), rdev_get_id(9)

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okay that's the page 💖 sourced from ./drivers/regulator, stamped October 2026, titled regulator_handle_critical(9) — mwah 💋