regulator_dev_lookup(9)

💅 regulator_dev_lookup(9) 💅

okay bestie, welcome to the Kernel API Manual page for regulator_dev_lookup. This one is lowkey iconic: it looks up a regulator device, and it has rules about refcounts. Let’s get into it. ✨

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🎀 NAME 🎀

regulator_dev_lookup — lookup a regulator device. 💖

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✨ SYNOPSIS ✨

struct regulator_dev * regulator_dev_lookup (struct device *dev , const
       char *supply );

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🫶 ARGUMENTS 🫶

• dev — device for regulator "consumer". like, the device that’s being all consumer-y about its regulator. 🍓
• supply — Supply name or regulator ID. that’s the thing you’re looking up, bestie.

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💖 RETURN 💖

pointer to struct regulator_dev or ERR_PTR encoded negative error number. 👑

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🌸 DESCRIPTION 🌸

okay so if it succeeds, it returns a struct regulator_dev that corresponds to the name supply and with the embedded struct device refcount incremented by one. 🔥

and listen: that refcount must be dropped by calling put_device. do not forget, bestie, that’s the whole vibe check. 🙈

on failure, one of these ERR_PTR encoded values is returned:

• -ENODEV — if lookup fails permanently. 💀
• -EPROBE_DEFER — if lookup could succeed in the future. ⭐

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👑 SEE ALSO 👑

Kernel file: ./drivers/regulator/core.c

the whole regulator squad is here, no cap:

• 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_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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xoxo, bestie 💖 this page is from source/version ./drivers/regulator, and the date is October 2026. go look up those regulators and remember the put_device, periodt. 💅✨