BATTERY_PMU(4)

🎀 battery_pmu(4) 🎀

okay bestie, meet battery_pmu(4) from the Kernel Interfaces Manual — it’s the driver situation for batteries and hardware sensors in PCI-based Apple Powerbooks, and it’s giving very specific vintage-laptop energy. 💻✨

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🌸 NAME 🌸

battery_pmu — battery and sensor support for PCI-based Apple Powerbooks 🍓

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✨ SYNOPSIS ✨

battery* at pmu?

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💖 DESCRIPTION 💖

so the battery_pmu driver provides support for batteries and hardware sensors found in first generation PCI-based PowerBooks — i.e. the Apple Powerbook 2400, 3400 and 3500 (also known as Original PowerBook G3). iconic lil machine era, no cap. 👑

currently it only exports a few sensors via the envsys(4) interface, including battery charge, voltage, CPU and battery temperature and AC power availability. that’s the whole sensor menu for now, bestie. 🔋🌡️⚡

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🦋 SEE ALSO 🦋

• envsys(4)
• pmu(4)
• envstat(8)

go read those if you wanna complete the lore. iykyk 💅

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💀 BUGS 💀

heads up, bestie: there is no APM emulation right now, and the battery current sensor may return misleading or wrong data. don’t trust it with your whole heart. 😭

also, this driver is considered preliminary and may be replaced at some point. so yeah — cute, useful, but still a work in progress. 🫶

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mwah 💋 — page credit: Debian, May 18, 2009. slay and goodbye. 🌈