1.\" $OpenBSD: pijuice.4,v 1.4 2022/10/24 09:23:27 jsg Exp $ 2.\" 3.\" Copyright (c) 2022 Marcus Glocker <mglocker@openbsd.org> 4.\" 5.\" Permission to use, copy, modify, and distribute this software for any 6.\" purpose with or without fee is hereby granted, provided that the above 7.\" copyright notice and this permission notice appear in all copies. 8.\" 9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16.\" 17.Dd $Mdocdate: October 24 2022 $ 18.Dt PIJUICE 4 19.Os 20.Sh NAME 21.Nm pijuice 22.Nd PiJuice HAT UPS 23.Sh SYNOPSIS 24.Cd "pijuice* at iic?" 25.Sh DESCRIPTION 26The 27.Nm 28driver provides support for the PiJuice HAT, 29an uninterruptible power supply for the Raspberry Pi. 30The integrated STM32F030CCT6 micro controller provides access through the I2C 31bus to several battery status values. 32.Sh SEE ALSO 33.Xr iic 4 , 34.Xr intro 4 , 35.Xr maxrtc 4 , 36.Xr apm 8 , 37.Xr sysctl 8 38.Sh HISTORY 39The 40.Nm 41driver first appeared in 42.Ox 7.3 . 43.Sh AUTHORS 44.An -nosplit 45The 46.Nm 47driver was written by 48.An Marcus Glocker Aq Mt mglocker@openbsd.org . 49.Sh CAVEATS 50The PiJuice HAT EEPROM currently doesn't contain the device tree information 51to match and attach this device. 52It requires a custom device tree blob overlay which gets loaded during the 53bootstrapping process. 54