adf_dev_measure_clock(9)

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

okay so picture this: it's a kernel API manual page, it's called adf_dev_measure_clock, and it is literally here to measure your device clock frequency. that's the whole vibe. let's get into it 🫶

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✨ NAME ✨

adf_dev_measure_clock — measures device clock frequency 👑 (yes that's it, that's the job, no cap)

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🌸 SYNOPSIS 🌸

int adf_dev_measure_clock (struct adf_accel_dev *accel_dev , u32
*frequency , u32 min , u32 max );

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🎀 ARGUMENTS 🎀

• accel_dev — Pointer to acceleration device. that's the main character we're measuring 💅
• frequency — Pointer to variable where result will be stored. yes, this is where the number lands ✨
• min — Minimal allowed frequency value 🍓
• max — Maximal allowed frequency value 🔥

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🦋 DESCRIPTION 🦋

so here's the tea: if the measurement result will go beyond the min/max thresholds, the value will take the value of the crossed threshold. like, it gets clamped. no escaping the vibes you set up 💀

and about accuracy — this algorithm compares the device firmware timestamp with the kernel timestamp. so we can't expect too high accuracy from this measurement. ngl that's just how it is, it's giving "good enough" and honestly? we respect it 🙈

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💖 RETURN 💖

• 0 — measurement succeed ✨ (slay)
• -ETIMEDOUT — measurement failed 😭

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🌈 SEE ALSO 🌈

Kernel file ./drivers/crypto/intel/qat/qat_common/adf_clock.c — go read it, iykyk 🧚

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and that's the whole page, bestie! 🎀 this one came from the source listed as ./drivers/crypto/intel/qat/qat... and it's dated October 2026 — so yeah, shoutout to that version and that date, iconic behavior, periodt 💜