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.\"	$OpenBSD: pijuice.4,v 1.4 2022/10/24 09:23:27 jsg Exp $
.\"
.\" Copyright (c) 2022 Marcus Glocker <mglocker@openbsd.org>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd $Mdocdate: October 24 2022 $
.Dt PIJUICE 4
.Os
.Sh NAME
.Nm pijuice
.Nd PiJuice HAT UPS
.Sh SYNOPSIS
.Cd "pijuice* at iic?"
.Sh DESCRIPTION
The
.Nm
driver provides support for the PiJuice HAT,
an uninterruptible power supply for the Raspberry Pi.
The integrated STM32F030CCT6 micro controller provides access through the I2C
bus to several battery status values.
.Sh SEE ALSO
.Xr iic 4 ,
.Xr intro 4 ,
.Xr maxrtc 4 ,
.Xr apm 8 ,
.Xr sysctl 8
.Sh HISTORY
The
.Nm
driver first appeared in
.Ox 7.3 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Marcus Glocker Aq Mt mglocker@openbsd.org .
.Sh CAVEATS
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.