QCCPUCP(4)

🎀 QCCPUCP(4) — the Qualcomm CPUCP mailbox controller, explained 💅

okay bestie, so this is the <pink>qccpucp</pink> man page from section 4 of the manual (kernel interfaces, iykyk) and honestly it's short but it ate. let's get into it ✨

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🌸 SYNOPSIS 🌸

qccpucp* at fdt?

that's it. that's the whole config line. qccpucp* attaches at fdt? — the ? is doing its little optional thing, no cap 🫶

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💖 DESCRIPTION 💖

so the qccpucp handles communication with the Qualcomm CPUSS Control Processor. think of it as the little messenger that knocks on the processor's door for you 🔔

it's used as a doorbell for CPU frequency management via scmi(4) on Qualcomm Snapdragon X Elite devices. like, literally just a doorbell. press it, the frequency people answer, slay 💅

ngl the whole job is "ring the bell," and honestly? iconic. main character energy for a mailbox controller fr fr 👑

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🦋 SEE ALSO 🦋

• intro(4) — the intro to section 4, start here if you're lost bestie
• scmi(4) — the one actually doing the frequency management that qccpucp rings the doorbell for

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⭐ HISTORY ⭐

the qccpucp device driver first appeared in OpenBSD 7.7 ✨ so it's new-new, freshly dropped 🎀

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👑 AUTHORS 👑

the qccpucp driver was written by Tobias Heider <tobhe@openbsd.org> — thank you for your service, king 🫶💜

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and that's the whole vibe check 💀 this page is from the Debian build, dated November 19, 2024, and the manual name is QCCPUCP(4) — mwah, go forth and ring that doorbell 🔔💖🌸