regulator_get(9)

💅 regulator_get(9) — like, the whole kernel API manual, but make it make sense

okay bestie, so this is a page from the Kernel API Manual, and it's about regulator_get(9). Yes, that's a real function name, no I'm not kidding, and yes it's lowkey important. Sit down, hydrate, let's go 🫶

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✨ NAME ✨

regulator_get — lookup and obtain a reference to a regulator. That's it, that's the vibe. You're getting a handle on a regulator, fr fr.

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🦋 SYNOPSIS 🦋

struct regulator * regulator_get (struct device *dev , const char *id );

like, you hand it a device and an id and it hands you back a struct regulator * pointer. iconic behavior honestly.

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🎀 ARGUMENTS 🎀

• dev — the device that's playing the "consumer" role for this regulator 🧚 like, the one who's gonna use the power.
• id — the supply name or the regulator ID. this is how you tell it which one you want, iykyk.

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💖 DESCRIPTION 💖

okay so here's the tea ☕ — using supply names that you set up through set_consumer_device_supply is strongly encouraged. like, that's the recommended path, no cap.

and the rec is this: the supply name you use should match the name used for the supply and/or the relevant device pins in the datasheet. yes, the datasheet. yes, you have to open it. I know. 😭 it's giving homework but it's also giving correct hardware behavior so.

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🌈 RETURN 🌈

so what do you get back? either:

• a pointer to a struct regulator that corresponds to the regulator producer 🎉 (slay), or
• an ERR_PTR encoded negative error number 💀 (not slay, check it with IS_ERR() in your head, bestie — well, the page says it's ERR_PTR encoded, that's the fact, I'm just being dramatic)

⚠️ real talk: that error is encoded inside the pointer, so please don't just do if (!ptr) and call it a day. that's not a null check situation. 🙈

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🔥 SEE ALSO 🔥

this list is long and I respect it deeply. Kernel file ./drivers/regulator/core.c plus:

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_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)

like… go read some of those. pick a fave. they're all in ./drivers/regulator/core.c and they all have main character energy in their own way 👑

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and that's the page!! mwah 💋 this was the Kernel API Manual, brought to you from ./drivers/regulator, dated October 2026 — go forth and regulator_get responsibly, bestie 🍓✨