cpufreq_get_hw_max_freq(9)

💅 cpufreq_get_hw_max_freq(9) — from the Kernel API Manual, bestie ✨

Okay so we're in the kernel API manual today and this one is a lil function called cpufreq_get_hw_max_freq — lowercase, snake_case, absolutely serving c-internal-docs realness 🫶

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🌸 NAME 🌸

cpufreq_get_hw_max_freq — gets the max hardware frequency of the CPU, no cap 👑

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✨ SYNOPSIS ✨

unsigned int cpufreq_get_hw_max_freq (unsigned int cpu );

Like, that's the whole signature. She's compact. She's iconic. Periodt 💅

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🎀 ARGUMENTS 🎀

• cpu — the CPU number. that's it. that's the arg. bestie just hands over a CPU number and we go from there 🦋

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💖 DESCRIPTION 💖

So the default return value is the max_freq field of cpuinfo. That's the vibe! That's literally what it does. The way that's the entire description and honestly? ate. 🔥

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👑 SEE ALSO 👑

Kernel file ./drivers/cpufreq/cpufreq.c — and, like, 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(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)

That's twenty-eight (28) cross-references, iykyk. click through them, she's worth it 🌈

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and that's the page!! mwah 💋 this lil slice of the Kernel API Manual lives under ./drivers/cpufreq and it's dated October 2026 — star ⭐ it, bookmark it, screenshot it for the group chat, idk but don't lose it 🎀💖✨