set_machine_constraints(9)

set_machine_constraints(9) 💅

from the Kernel API Manual — okay so bestie, this is the page for set_machine_constraints, and it's literally the regulator-constraints setup moment ✨

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🎀 NAME 🎀

set_machine_constraints — sets regulator constraints

✨ SYNOPSIS ✨

int set_machine_constraints (struct regulator_dev *rdev , bool is_locked
);

🌸 ARGUMENTS 🌸

• rdev — regulator source. yes that's the struct, main character energy 👑
• is_locked — whether or not this is called with locks held already. lock vibe check 🫶

🦋 DESCRIPTION 🦋

okay so this allows platform initialisation code to define and constrain regulator circuits — think valid voltage/current ranges, etc. 💖

NOTE: Constraints must be set by platform code in order for some regulator operations to proceed, i.e. set_voltage, set_current_limit, set_mode. like, must must, no cap — some operations literally won't proceed without it 😭🔥

⭐ RETURN ⭐

0 on success or a negative error number on failure. periodt 💅

💜 SEE ALSO 💜

Kernel file ./drivers/regulator/core.c — and the whole regulator friend group is right here:

• 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)
• 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_handle_critical(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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ok that's the whole page, bestie 💖 source/version ./drivers/regulator, October 2026, set_machine_constraints(9) — byeee 🫶✨