1.\" $OpenBSD: aplcpu.4,v 1.2 2022/02/20 20:01:04 jmc Exp $ 2.\" 3.\" Copyright (c) 2022 Mark Kettenis <kettenis@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: February 20 2022 $ 18.Dt APLCPU 4 arm64 19.Os 20.Sh NAME 21.Nm aplcpu 22.Nd Apple CPU power states 23.Sh SYNOPSIS 24.Cd "aplcpu* at fdt?" 25.Sh DESCRIPTION 26The 27.Nm 28driver provides support for managing the CPU power states on Apple 29SoCs. 30These power states can be set to reduce power usage and extend battery 31life through the 32.Va hw.setperf 33.Xr sysctl 2 34mechanism. 35.Sh SEE ALSO 36.Xr sysctl 2 , 37.Xr intro 4 , 38.Xr apmd 8 , 39.Xr sysctl 8 40.Sh HISTORY 41The 42.Nm 43driver first appeared in 44.Ox 7.1 . 45.Sh AUTHORS 46.An -nosplit 47The 48.Nm 49driver was written by 50.An Mark Kettenis Aq Mt kettenis@openbsd.org . 51