dev_pm_qos_read_value(9)

💅 dev_pm_qos_read_value(9)

okay so first things first, this is a page from the Kernel API Manual (yes, that manual, the big serious one, but we're gonna make it cute) 🎀

✨ NAME ✨

dev_pm_qos_read_value — bestie, this one gets you the PM QoS constraint for a given device, and like… it's the locked version, mmkay? 🔒 no cap.

🌸 SYNOPSIS 🌸

s32 dev_pm_qos_read_value (struct device *dev , enum dev_pm_qos_req_type type );

look at her go, she's giving "two arguments, zero drama" 💅

🦋 ARGUMENTS 🦋

• dev — the device you wanna get the PM QoS constraint value for. literally just hand her the device 🫶
• type — the QoS request type. that's the vibe of the request you're asking about ✨

👑 SEE ALSO 👑

the whole friend group, in the kernel file ./drivers/base/power/qos.c — go say hi to all of them, they're iconic:

• __dev_pm_qos_flags(9)
• dev_pm_qos_flags(9)
• __dev_pm_qos_resume_latency(9)
• apply_constraint(9)
• dev_pm_qos_constraints_destroy(9)
• dev_pm_qos_add_request(9)
• __dev_pm_qos_update_request(9)
• dev_pm_qos_update_request(9)
• dev_pm_qos_remove_request(9)
• dev_pm_qos_add_notifier(9)
• dev_pm_qos_remove_notifier(9)
• dev_pm_qos_add_ancestor_request(9)
• dev_pm_qos_expose_latency_limit(9)
• dev_pm_qos_hide_latency_limit(9)
• dev_pm_qos_expose_flags(9)
• dev_pm_qos_hide_flags(9)
• dev_pm_qos_update_flags(9)
• dev_pm_qos_get_user_latency_tolerance(9)
• dev_pm_qos_update_user_latency_tolerance(9)
• dev_pm_qos_expose_latency_tolerance(9)
• dev_pm_qos_hide_latency_tolerance(9)

okay that's the whole page bestie, go forth and read those values 💖

sign-off szn: this one lives in ./drivers/base/power, and the date on it is October 2026 ⭐ so like… mark your calendars, it's giving future energy 🧚‍♀️ mwah 💋