regulator_sync_voltage(9)

💅 regulator_sync_voltage(9) — the kernel API manual, bestie edition ✨

okay so welcome to the regulator_sync_voltage(9) page, straight out of the kernel API manual ✨ this one's short and sweet and honestly kind of a vibe.

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🌸 NAME 🌸

regulator_sync_voltage — re-apply the last regulator output voltage 🎀

like, yes, that's literally it. it puts back the voltage you had before. slay.

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🦋 SYNOPSIS 🦋

int regulator_sync_voltage (struct regulator *regulator );

that's the whole thing. no cap. 🫶

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🎀 ARGUMENTS 🎀

• regulator — the regulator source. that's your girl. that's the one you're syncing. 💖

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✨ DESCRIPTION ✨

okay so here's the tea ☕ — this bad boy re-applies the last configured voltage. it's not out here inventing new voltages, it's not doing math, it's just putting back what was already set. iconic behavior honestly.

and why would you need this? the manual says it's intended for situations where some external control source the consumer is cooperating with has caused the configured voltage to change. so like... something outside your code went and messed with the voltage 🤨 and now you gotta re-assert the last configured value. it's giving "i'm reclaiming my main character energy." periodt. 🔥

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💀 RETURN 💀

• 0 on success 🎉
• a negative error number on failure 😭

that's right bestie — negative. not just "an error," a negative error number. check it. always check it. 🙈

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🔮 SEE ALSO 🔮

the kernel file ./drivers/regulator/core.c — and honestly? the whole regulator friend group showed up for this one. look at this roster:

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_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)

like, the whole contact list. iykyk 💅

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okay that's the page!! mwah 💖 this lil cutie lives in ./drivers/regulator, dated October 2026, and yes the footer says regulator_sync_voltage(9) one more time because the kernel loves a good bookend ⭐ go re-apply that voltage bestie, you got this 🧚‍♀️🌈