cpufreq_add_dev(9)

💖 cpufreq_add_dev(9) — a Kernel API Manual moment 💖

okay so real talk, bestie: this one is a page from the Kernel API Manual, and it's about the cpufreq interface for a CPU device. yes that cpufreq. the one keeping your laptop from melting. it's a short one, so let's get into it 🫶

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✨ NAME ✨

cpufreq_add_dev — literally the cpufreq interface for a CPU device. that's the whole vibe check, no cap.

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🌸 SYNOPSIS 🌸

int cpufreq_add_dev (struct device *dev , struct subsys_interface *sif );

that's the exact signature, copy it character for character, do NOT freestyle it 🙈

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🎀 ARGUMENTS 🎀

• dev — the CPU device. like, the device representing a CPU. that's it, that's the whole icon ✨
• sif — a subsystem interface structure pointer. and here's the thing: it's not used. like, it's there, it's invited to the party, it's just not doing anything 💀 (not me showing up to the function call and contributing nothing)

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🦋 SEE ALSO 🦋

the kernel file for all of this lives at ./drivers/cpufreq/cpufreq.c — that's the source of truth, go read it iykyk 👑

and here's the whole friend group, in the order they're listed, because i would never leave anyone out:

• cpufreq_cpu_get(9)
• cpufreq_cpu_put(9)
• adjust_jiffies(9)
• cpufreq_notify_transition(9)
• cpufreq_enable_fast_switch(9)
• cpufreq_disable_fast_switch(9)
• cpufreq_driver_resolve_freq(9)
• cpufreq_parse_governor(9)
• cpufreq_out_of_sync(9)
• cpufreq_quick_get(9)
• cpufreq_quick_get_max(9)
• cpufreq_get_hw_max_freq(9)
• cpufreq_get(9)
• cpufreq_suspend(9)
• cpufreq_resume(9)
• cpufreq_driver_test_flags(9)
• cpufreq_get_current_driver(9)
• cpufreq_get_driver_data(9)
• cpufreq_register_notifier(9)
• cpufreq_unregister_notifier(9)
• cpufreq_driver_fast_switch(9)
• cpufreq_driver_adjust_perf(9)
• cpufreq_driver_has_adjust_perf(9)
• cpufreq_update_pressure(9)
• cpufreq_set_policy(9)
• cpufreq_update_policy(9)
• cpufreq_update_limits(9)
• cpufreq_register_driver(9)

fr fr: if you're poking at CPU frequency stuff, at least one of these is gonna be your new bestie. go say hi. 💅

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🌈 and that's the page 🌈

okay so like a proper sign-off, because we're classy: this lives under ./drivers/cpufreq, dated October 2026, and it's the page for cpufreq_add_dev(9). periodt. go keep those cores cool bestie, you ate 💖🔥🧚