dev_pm_domain_start(9)

okay so bestie, welcome to dev_pm_domain_start(9) — straight out of the Kernel API Manual and ready to explain itself. 💅 This is the little API that starts a device through its PM domain, and we’re keeping every detail on deck. ✨

🎀 NAME 🎀

dev_pm_domain_start — start the device through its PM domain. 💖

🦋 SYNOPSIS 🦋

int dev_pm_domain_start (struct device *dev );

🌸 ARGUMENTS 🌸

• dev — the struct device * you’re starting. Literally “Device to start.” Periodt. 🫶

✨ DESCRIPTION ✨

Typically, a subsystem/driver calls this during probe when it needs to start its device from the PM domain’s perspective. 🎀

Important vibe check: it’s assumed that the PM domain is already powered on when this function is called. ⚡ Don’t come for this function if the domain is still asleep, okay?

It returns 0 on success and negative error values on failures. 😭

👑 SEE ALSO 👑

Kernel file ./drivers/base/power/common.c is the source-side hangout, and these functions are the friend group:

• 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_set(9)
• dev_pm_domain_set_performance_state(9)

Signed off from ./drivers/base/power with the October 2026 version energy, for dev_pm_domain_start(9) — periodt. 💖✨