cpufreq_suspend(9)

💤 cpufreq_suspend(9) 💤

okay so this is a page from the Kernel API Manual, bestie — it's cpufreq_suspend(9), and it's literally the little function that tucks your CPUFreq governors into bed before the whole system goes night-night ✨

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🌸 NAME 🌸

cpufreq_suspend — suspend CPUFreq governors 🫶

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🎀 SYNOPSIS 🎀

void cpufreq_suspend (void );

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🦋 ARGUMENTS 🦋

• void — no arguments, babes. nothing. zero. she takes nothing and she gives everything 💅

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✨ DESCRIPTION ✨

So here's the vibe: cpufreq_suspend gets called during system-wide Suspend/Hibernate cycles, and its whole job is suspending the governors 🧚

Why, you ask? Because some platforms can't change frequency after this point in the suspend cycle — like, the window has closed, the door is shut, no more frequency changes, periodt 😭

And the reason is genuinely so real of them: some of the devices the governors use for changing frequency — think i2c, regulators, etc. — get suspended quickly right after this point. so if you were planning on fiddling with frequency later, bestie... you can't. the tools are already asleep 💀

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🔥 SEE ALSO 🔥

Kernel file ./drivers/cpufreq/cpufreq.c, plus the whole friend 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_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)

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and that's the whole page, bestie, you ate that 🍓

this lil cutie lives in ./drivers/cpufreq, she's dated October 2026, and she's part of the Kernel API Manual — go say hi, she doesn't bite 💜🎀👑