a9880bfe11
New driver to ACPI generic event device, defined in ACPI spec. Some ACPI power button may not work without this. In qemu arm64 with "virt" machine, with ACPI firmware, enable devd check devd message by and invoke following command in qemu monitor (qemu) system_powerdown and make sure some power button input event appear. (setting sysctl hw.acpi.power_button_state=S5 is not work, because ACPI tree does not have \_S5 object.) Reviewed by: andrew, hrs Differential Revision: https://reviews.freebsd.org/D37032
65 lines
2.1 KiB
Groff
65 lines
2.1 KiB
Groff
.\" Copyright (c) 2022 Takanori Watanabe
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd October 18, 2022
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.Dt ACPI_GED 4
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.Os
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.Sh NAME
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.Nm acpi_ged
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.Nd "ACPI Generic Event Device"
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.Sh SYNOPSIS
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To compile this driver into the kernel,
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place the following line in your
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kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device acpi_ged"
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.Ed
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.Pp
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Alternatively, to load the driver as a
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module at boot time, place the following line in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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acpi_ged_load="YES"
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.Ed
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for generic events interface.
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This handles interrupts and evaluates the specific ACPI method.
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This may generate optionally ACPI notify for another device.
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.Sh SEE ALSO
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.Xr acpi 4
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.Sh HISTORY
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The
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.Nm
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device driver first appeared in
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.Fx 14.0 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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driver was written by
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.An Takanori Watanabe Aq Mt takawata@FreeBSD.org
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