cpufreq_register_driver(9)

💅 cpufreq_register_driver(9)

okay bestie so this is a page from the Kernel API Manual — the one and only cpufreq_register_driver(9) — and it's literally the "hi, I'd like a job pls" function for CPU Frequency drivers ✨

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🌸 NAME

cpufreq_register_driver — register a CPU Frequency driver 🎀

✨ SYNOPSIS

int cpufreq_register_driver (struct cpufreq_driver *driver_data );

🦋 ARGUMENTS

• driver_data — a struct cpufreq_driver holding the values# submitted by the CPU Frequency driver. yes, that's the vibe. that's the whole argument. it's giving "one struct, all the tea" 👑

💖 DESCRIPTION

So what it does is: it registers a CPU Frequency driver to this core code. that's the whole main character moment fr fr.

And what does it give you back? okay so:

• it returns zero on success — slay 💅
• it returns -EEXIST when another driver got here first (and isn't unregistered in the meantime). like, someone already claimed the spot, bestie. iconic of them but rude to you 😭

no cap, that's it. that's the entire behaviour. don't overthink it.

👀 SEE ALSO

Kernel file ./drivers/cpufreq/cpufreq.c — and like, the entire extended friendship group:

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_add_dev(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)

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and that's the whole page, bestie 🫶 live your truth, register your driver, come back with a zero return code. it lives down in ./drivers/cpufreq and the timestamp on it says October 2026 — so like, mark your calendar 🗓️💜 mwah 💋