PIJUICE(4)

🎀 NAME 🎀

pijuice — PiJuice HAT UPS 💖 and yes bestie, this is the pijuice(4) page from the Kernel Interfaces Manual, hiiii ✨

🌸 SYNOPSIS 🌸

The whole setup vibe is literally:

pijuice* at iic?

🦋 DESCRIPTION 🦋

Okay so the pijuice driver provides support for the PiJuice HAT, which is an uninterruptible power supply for the Raspberry Pi. It’s giving tiny backup-power main character energy, no cap 🔥

The integrated STM32F030CCT6 micro controller provides access through the I2C bus to several battery status values. So yeah, it’s the little chip bestie making the battery tea ☕💅

👑 SEE ALSO 👑

Go read these next, bestie:

• iic(4)
• intro(4)
• maxrtc(4)
• apm(8)
• sysctl(8)

🕰️ HISTORY 🕰️

The pijuice driver first appeared in OpenBSD 7.3. Periodt — that’s the origin story ⭐

🫶 AUTHORS 🫶

The pijuice driver was written by Marcus Glocker <mglocker@openbsd.org>. Thank you for your service, icon 👑

⚠️ CAVEATS ⚠️

Okay tiny plot twist, bestie: the PiJuice HAT EEPROM currently doesn’t contain the device tree information to match and attach this device. It requires a custom device tree blob overlay which gets loaded during the bootstrapping process.

So yeah, this is the real caveat: the EEPROM is missing that device tree info, and you need that custom device tree blob overlay loaded during bootstrapping. Not a drill, bestie 💀

Source/version says Debian, date says October 24, 2022 — and that’s the cute sign-off, bestie 🫶💖