regulator_set_voltage(9)

💅 regulator_set_voltage(9) — the Kernel API Manual, bestie edition 🎀

okay so this is a page straight out of the Kernel API Manual, and today's main character is regulator_set_voltage — the function that tells a voltage regulator what voltage to actually put out. let's get into it ✨

---

🌸 NAME 🌸

regulator_set_voltage — set regulator output voltage 💖

---

🦋 SYNOPSIS 🦋

int regulator_set_voltage (struct regulator *regulator , int min_uV ,
int max_uV );

---

💜 ARGUMENTS 💜

• regulator — the regulator source, like, the actual thing you're talking to 🫶
• min_uV — minimum required voltage in uV (yes, microvolts, read the unit, i'm begging you)
• max_uV — maximum acceptable voltage in uV

---

⭐ DESCRIPTION ⭐

so what it does is sets a voltage regulator to the desired output voltage. that's the whole vibe. and the slay part? it can be set during any regulator state — IOW, the regulator can be disabled or enabled, doesn't matter, the call still works 🎀

and here's the behaviour breakdown, no cap:

• if the regulator is enabled, then the voltage will change to the new value immediately ⚡
• otherwise, if the regulator is disabled, the regulator will output at the new voltage when enabled — like it's saving it for later 💅

---

🙈 NOTE 🙈

if the regulator is shared between several devices, then the lowest request voltage that meets the system constraints will be used — it's giving compromise, it's giving teamwork 🤝

also, regulator system constraints must be set for this regulator before calling this function, otherwise this call will fail. like, i cannot stress this enough, set your constraints first or it's a 💀

---

🌈 RETURN 🌈

0 on success, or a negative error number on failure 😭 (so like, check it, bestie)

---

👑 SEE ALSO 👑

Kernel file ./drivers/regulator/core.c, and honestly the whole extended universe of friends:

• 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_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)

---

and that's the whole page, bestie 🧚💖 this one lives over in ./drivers/regulator and it's dated October 2026 — go forth and set those voltages responsibly, mwah 💋🌸