dev_pm_domain_set(9)

💖 dev_pm_domain_set(9) 💖

okay so bestie, welcome to the Kernel API Manual entry for dev_pm_domain_set — it's giving “tiny function, major PM-domain energy” ✨

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✨ NAME ✨

dev_pm_domain_set — sets the PM domain of a device. periodt.

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🎀 SYNOPSIS 🎀

void dev_pm_domain_set (struct device *dev , struct dev_pm_domain *pd );

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🫶 ARGUMENTS 🫶

• dev — the device whose PM domain is getting set, obvi.
• pd — the PM domain to set it to, or NULL. both are valid, no cap.

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🌸 DESCRIPTION 🌸

This sets the PM domain that the device belongs to. Lowkey important: a device’s PM domain needs to be set before its probe finishes — meaning before it’s bound to a driver. So like, handle it early, bestie 🫶

⚠️ This function must be called with the device lock held. That part is not optional, fr fr.

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🦋 SEE ALSO 🦋

Kernel file: ./drivers/base/power/common.c — and the whole friend group is:

• dev_pm_get_subsys_data(9)
• dev_pm_put_subsys_data(9)
• dev_pm_domain_attach(9)
• dev_pm_domain_attach_by_id(9)
• dev_pm_domain_attach_by_name(9)
• dev_pm_domain_attach_list(9)
• devm_pm_domain_detach_list(9)
• devm_pm_domain_attach_list(9)
• dev_pm_domain_detach(9)
• dev_pm_domain_detach_list(9)
• dev_pm_domain_start(9)
• dev_pm_domain_set_performance_state(9)

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mwah 💋 — signed from ./drivers/base/power, dated October 2026, and it’s all about dev_pm_domain_set(9) 🫶✨