LMENV(4)

💖 LMENV(4) — the hardware monitor girlies 💖

okay so bestie, this is the Kernel Interfaces Manual page for lmenv, and honestly? she's giving "quiet overachiever who reads your temperature for a living." let's get into it ✨

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🌡️ NAME 🌡️

lmenv — the driver for National Semiconductor LM81, LM87, and their compatible hardware monitor besties 🫶

📜 SYNOPSIS 📜

lmenv0 at iic0 addr 0x2c: ADM9240 rev 2

🎀 DESCRIPTION 🎀

so the lmenv driver is the supportive friend for these iicbus hardware monitors: the National Semiconductor LM87, the National Semiconductor LM81, the Analog Devices ADM9240, and the Dallas Semiconductor DS1780. that's the whole squad 💅

all the sensor values get reported through the envstat(8) interface — that's where you go to actually look at them, iykyk.

lmenv supports these voltage, temperature, and fan speed sensors, and yes she's serving a full lineup 🔥

• +2.5Vin — Volts DC
• Vccp1 — Volts DC
• +Vcc — Volts DC
• +5Vin/Vcc — Volts DC
• +12Vin — Volts DC
• Vccp2 — Volts DC
• External — Temperature
• Internal — Temperature
• FAN1 — Speed
• FAN2 — Speed

and here's the little plot twist 🫢 on the LM87 monitor, the AIN1 and AIN2 Volts DC sensors may replace either — or both — of the FAN1 and FAN2 speed sensors, respectively. so like, swap energy. it's giving flexibility fr fr.

🌈 SEE ALSO 🌈

• envsys(4)
• envstat(8)

🦋 HISTORY 🦋

the lmenv driver first appeared in OpenBSD 3.9. NetBSD support was added in NetBSD 7.0. she's been around, she's iconic, periodt 💜

👑 AUTHORS 👑

the lmenv driver was written for OpenBSD by Mark Kettenis ⟨kettenis@openbsd.org⟩, and ported to NetBSD by Julian Coleman ⟨jdc@NetBSD.org⟩. legends only ✨

💀 BUGS 💀

• High and low sensor limits are not supported. 😭
• Interrupt support is not implemented. 💀

so yeah — no limits, no interrupts. she reports the numbers and that's the gig. don't come for her about the rest, bestie 🙈

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and that's the page! this one's from the Debian edition, dated October 14, 2013 — shoutout to whoever formatted her, mwah 💖🎀🌸