Manpage for dfs(4) with tweaks from jmc@

ok sthen@, kettenis@, miod@

2 files changed, 55 insertions, 2 deletions

diff --git a/share/man/man4/man4.macppc/Makefile b/share/man/man4/man4.macppc/Makefile
index 2dc6287cf87..79d9082564b 100644
--- a/share/man/man4/man4.macppc/Makefile
+++ b/share/man/man4/man4.macppc/Makefile
@@ -1,9 +1,9 @@
-#	$OpenBSD: Makefile,v 1.33 2010/04/09 19:25:38 jasper Exp $
+#	$OpenBSD: Makefile,v 1.34 2011/05/25 07:46:59 mpi Exp $
 #	from: @(#)Makefile	5.1 (Berkeley) 2/12/91
 #	Id: Makefile,v 1.4 1995/12/14 05:41:38 deraadt Exp $
 
 MAN=	abtn.4 adb.4 aoa.4 apm.4 asms.4 autoconf.4 awacs.4 \
-	bm.4 daca.4 esp.4 fcu.4 ht.4 intro.4 \
+	bm.4 daca.4 dfs.4 esp.4 fcu.4 ht.4 intro.4 \
 	kauaiata.4 kiic.4 macobio.4 macgpio.4 mc.4 mediabay.4 mem.4 memc.4 \
 	mesh.4 mpcpcibr.4 openpic.4 openprom.4 onyx.4 pgs.4 piic.4 smu.4 \
 	snapper.4 sysbutton.4 tpms.4 tumbler.4 xlights.4 zs.4
diff --git a/share/man/man4/man4.macppc/dfs.4 b/share/man/man4/man4.macppc/dfs.4
new file mode 100644
index 00000000000..33429907897
--- /dev/null
+++ b/share/man/man4/man4.macppc/dfs.4
@@ -0,0 +1,53 @@
+.\"	$OpenBSD: dfs.4,v 1.1 2011/05/25 07:46:59 mpi Exp $
+.\"
+.\" Copyright (c) 2011 Martin Pieuchot <mpi@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: May 25 2011 $
+.Dt DFS 4 macppc
+.Os
+.Sh NAME
+.Nm dfs
+.Nd Dynamic Frequency Switching
+.Sh SYNOPSIS
+.Cd "dfs* at macgpio?"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the Dynamic Frequency Switching
+feature found on some PowerPC microprocessors.
+.Pp
+It conserves power by lowering the processor operating frequency.
+Depending on the processor model, the processor-to-system bus ratio can
+be divided by two or four.
+.Sh HARDWARE
+Processors supported by the
+.Nm
+driver are part of the PowerPC G4 family and are found on various iBook
+and PowerBook machines:
+.Bd -literal -offset indent
+MPC7447A	PowerPC 7447 "Apollo 7"
+MPC7448		PowerPC 7448 "Apollo 8"
+.Ed
+.Sh SEE ALSO
+.Xr macgpio 4 ,
+.Xr sysctl 8 ,
+.Rs
+.%T MPC7450 RISC Microprocessor Family Reference Manual
+.Re
+.Sh HISTORY
+Support for the
+.Nm
+driver first appeared in
+.Ox 5.0 .