acpi_add_pm_notifier(9)

💖 acpi_add_pm_notifier (9) — from the Kernel API Manual, bestie 💖

okay so bestie, this one's from the kernel API manual and it's genuinely such a servalittle function. it's called acpi_add_pm_notifier, and what it does is register a PM notify handler for a given ACPI device. that's the whole vibe. let's get into it 🫶

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✨ NAME ✨

acpi_add_pm_notifier — register PM notify handler for given ACPI device. yes that's the official name, she's literally in the (9) section, we stan an organized queen 👑

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🦋 SYNOPSIS 🦋

like here's her whole signature, copy it exactly bestie, no typos, she's watching 👀

acpi_status acpi_add_pm_notifier (struct acpi_device *adev , struct
device *dev , void (*func)(struct acpi_device_wakeup_context *context)
);

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🌸 ARGUMENTS 🌸

okay three args, all main characters, let me introduce them 💅

• adev — the ACPI device you're adding the notify handler for. she's the one getting the handler, periodt.
• dev — the device that generates a wakeup event while the notification is being handled. she's the one doing the waking up ✨
• func — the work function that executes when the notification is handled. the actual doing-the-thing girl 🎀

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🎀 NOTE 🎀

this is the important part, don't skip it, iykyk 💀

adev does not need to be a run-wake or wakeup device to be a valid source of PM wakeup events. no cap. literally not required.

for example — and this is such a good example — wakeup events may be generated for bridges if one of the devices below the bridge is signaling wakeup, even if the bridge itself doesn't have a wakeup GPE associated with it. the way that bridges can just vibe and relay wakeup energy without their own GPE?? iconic 🌈

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👑 SEE ALSO 👑

okay this list is LONG but she ate and we're listing every single one, no skipping, that's the rule 🍓

kernel file: ./drivers/acpi/device_pm.c

• acpi_power_state_string(9)
• acpi_device_get_power(9)
• acpi_device_set_power(9)
• acpi_device_fix_up_power(9)
• acpi_device_fix_up_power_extended(9)
• acpi_device_fix_up_power_children(9)
• acpi_dev_power_up_children_with_adr(9)
• acpi_dev_power_state_for_wake(9)
• acpi_remove_pm_notifier(9)
• acpi_dev_pm_get_state(9)
• acpi_pm_device_sleep_state(9)
• acpi_pm_notify_work_func(9)
• acpi_device_wakeup_enable(9)
• acpi_device_wakeup_disable(9)
• acpi_pm_set_device_wakeup(9)
• acpi_dev_pm_low_power(9)
• acpi_dev_pm_full_power(9)
• acpi_dev_suspend(9)
• acpi_dev_resume(9)
• acpi_subsys_runtime_suspend(9)
• acpi_subsys_runtime_resume(9)
• acpi_subsys_prepare(9)
• acpi_subsys_complete(9)
• acpi_subsys_suspend(9)
• acpi_subsys_suspend_late(9)
• acpi_subsys_suspend_noirq(9)
• acpi_subsys_resume_noirq(9)
• acpi_subsys_resume_early(9)
• acpi_subsys_resume(9)
• acpi_subsys_freeze(9)
• acpi_subsys_restore_early(9)
• acpi_subsys_poweroff(9)
• acpi_subsys_poweroff_late(9)
• acpi_subsys_poweroff_noirq(9)
• acpi_dev_pm_detach(9)
• acpi_dev_pm_attach(9)
• acpi_storage_d3(9)
• acpi_dev_state_d0(9)

not me listing thirty-eight manpage refs in a row 💀 but that's the whole fam and they all deserve their moment 🫶

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alright bestie that's the whole page!! sources say this one lives in ./drivers/acpi and she's dated October 2026, so mark your calendars, she's from the future and she's slaying 💜✨ bye mwah 💅