acpi_device_get_power(9)

🌸 NAME 🌸

okay bestie, welcome to acpi_device_get_power(9) — this is the Kernel API Manual page for acpi_device_get_power, and its whole vibe is: Get power state of an ACPI device. 💅

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✨ SYNOPSIS ✨

here's the signature, kept exactly as-is so nobody comes for me:

int acpi_device_get_power (struct acpi_device *device , int *state );

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🎀 ARGUMENTS 🎀

• device — Device to get the power state of.
• state — Place to store the power state of the device.

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💅 DESCRIPTION 💅

okay so here's the important tea, and I need you to listen: this function does not update the device's power.state field. it may update its parent's power.state field — specifically when the parent's power state is unknown and the device's power state turns out to be D0. 👑

also, it does not update power resource reference counters to ensure that the power state returned by it will be persistent. and it may return a power state shallower than previously set by acpi_device_set_power for device (if that power state depends on any power resources). that's the caveat, bestie — no cap. 😭

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🦋 SEE ALSO 🦋

the kernel file is ./drivers/acpi/device_pm.c — go peek at that. also these icons:

• acpi_power_state_string(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_add_pm_notifier(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)

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mwah 💋 that's the page! source/version: ./drivers/acpi; date: October 2026; title: acpi_device_get_power(9). now go get that power state, bestie — periodt. 💖 ✨ 🎀 🦋 🌸