Add Smart Battery Monitor device driver. Provided by

Aaron Linville <aaron@linville.org> in PR 5398.

3 files changed, 71 insertions, 3 deletions

diff --git a/share/man/man4/Makefile b/share/man/man4/Makefile
index aea4a2104fe..e141f792323 100644
--- a/share/man/man4/Makefile
+++ b/share/man/man4/Makefile
@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile,v 1.406 2007/02/24 20:43:05 deraadt Exp $
+#	$OpenBSD: Makefile,v 1.407 2007/02/28 21:54:43 grange Exp $
 
 MAN=	aac.4 ac97.4 acphy.4 \
 	acpi.4 acpiac.4 acpibat.4 acpibtn.4 acpicpu.4 acpidock.4 \
@@ -30,7 +30,7 @@ MAN=	aac.4 ac97.4 acphy.4 \
 	moscom.4 mpi.4 mpu.4 msk.4 mtd.4 mtdphy.4 multicast.4 mtio.4 ne.4 \
 	neo.4 netintro.4 nfe.4 nge.4 nmea.4 noct.4 nofn.4 nsclpcsio.4 \
 	nsgphy.4 nsphy.4 nsphyter.4 null.4 nviic.4 ohci.4 opl.4 options.4 \
-	onewire.4 oosiop.4 osiop.4 owid.4 owtemp.4 \
+	onewire.4 oosiop.4 osiop.4 owid.4 owsbm.4 owtemp.4 \
 	pcagpio.4 pcaled.4 pcdisplay.4 pchb.4 pci.4 pcib.4 pcfadc.4 \
 	pcfiic.4 pciide.4 pckbc.4 pckbd.4 pcmcia.4 pcn.4 pcppi.4 pcscp.4 \
 	pf.4 pflog.4 pfsync.4 pgt.4 piixpm.4 pim.4 \
diff --git a/share/man/man4/onewire.4 b/share/man/man4/onewire.4
index aec1d5cd1c3..a8a346fdd4f 100644
--- a/share/man/man4/onewire.4
+++ b/share/man/man4/onewire.4
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: onewire.4,v 1.3 2006/09/27 08:54:44 grange Exp $
+.\"	$OpenBSD: onewire.4,v 1.4 2007/02/28 21:54:43 grange Exp $
 .\"
 .\" Copyright (c) 2006 Alexander Yurchenko <grange@openbsd.org>
 .\"
@@ -52,6 +52,8 @@ Maxim/Dallas DS2490 USB 1-Wire adapter
 .Bl -tag -width 10n -offset ind -compact
 .It Xr owid 4
 ID family type device
+.It Xr owsbm 4
+smart battery monitor device
 .It Xr owtemp 4
 temperature family type device
 .El
diff --git a/share/man/man4/owsbm.4 b/share/man/man4/owsbm.4
new file mode 100644
index 00000000000..4533970e06c
--- /dev/null
+++ b/share/man/man4/owsbm.4
@@ -0,0 +1,66 @@
+.\"	$OpenBSD: owsbm.4,v 1.1 2007/02/28 21:54:43 grange Exp $
+.\"
+.\" Copyright (c) 2007 Aaron Linville <aaron@linville.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 December 4, 2006
+.Dt OWSBM 4
+.Os
+.Sh NAME
+.Nm owsbm
+.Nd 1-Wire smart battery monitor family type device
+.Sh SYNOPSIS
+.Cd "owsbm* at onewire?"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the 1-Wire smart battery monitor. The sensor
+possesses a temperature sensor, an A/D converter for measuring both
+battery voltage and current, a current accumulator of both incoming and
+outgoing current, an elapsed time and 40 bytes of nonvolatile EEPROM.
+.Pp
+Only the three voltages (VDD, VAD, CR) and temperature are accessible by
+the
+.Xr sysctl 8
+interface though.
+.Pp
+The following chips are supported by the driver:
+.Pp
+.Bl -bullet -compact -offset indent
+.It
+Maxim/Dallas DS2438
+.El
+.Sh MEASURING CURRENT
+.Pp
+The sensor does not measure current directly. Instead it measures the
+voltage across the Rsens pins.
+.Bl -bullet -offset indent
+I = Voltage CR / Rsens    (where Rsens is in Ohms)
+.El
+.Sh SEE ALSO
+.Xr intro 4 ,
+.Xr onewire 4 ,
+.Xr owtemp 4 ,
+.Xr sysctl 8
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Ox 4.? .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+driver was written by
+.An Aaron Linville Aq aaron@linville.org .