1.\" $OpenBSD: schsio.4,v 1.4 2013/07/16 16:05:49 schwarze Exp $ 2.\" 3.\" Copyright (c) 2009 Michael Knudsen <mk@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.Dd $Mdocdate: July 16 2013 $ 17.Dt SCHSIO 4 18.Os 19.Sh NAME 20.Nm schsio 21.Nd SMSC SCH311x LPC Super I/O 22.Sh SYNOPSIS 23.Cd "schsio* at isa? port 0x2e flags 0x0000" 24.Cd "schsio* at isa? port 0x4e flags 0x0000" 25.Cd "schsio* at isa? port 0x162e flags 0x0000" 26.Cd "schsio* at isa? port 0x164e flags 0x0000" 27.Sh DESCRIPTION 28The 29.Nm 30driver provides support for the SMSC SCH3112, SCH3114, and SCH3116 31ICs. 32Among other things, the devices contain environment sensors, a watchdog 33timer, and fan control. 34The 35.Nm 36driver supports the environment sensors and the watchdog timer. 37.Pp 38The hardware provides the following sensors: 39.Bl -column "Internal diode" "Units" "Typical" -offset indent 40.It Sy "Sensor" Ta Sy "Units" Ta Sy "Typical use" 41.It Li "Internal diode" Ta "uK" Ta "IC internal thermal diode" 42.It Li "Remote diode 1" Ta "uK" Ta "External thermal diode" 43.It Li "Remove diode 2" Ta "uK" Ta "External thermal diode" 44.It Li "FAN1" Ta "RPM" Ta "Fan tachometer" 45.It Li "FAN2" Ta "RPM" Ta "Fan tachometer" 46.It Li "FAN3" Ta "RPM" Ta "Fan tachometer" 47.It Li "+2.5V" Ta "uV" Ta "Voltage" 48.It Li "+1.5V (Vccp)" Ta "uV" Ta "Voltage" 49.It Li "+3.3V (VCC)" Ta "uV" Ta "Voltage" 50.It Li "+5V" Ta "uV" Ta "Voltage" 51.It Li "+12V" Ta "uV" Ta "Voltage" 52.It Li "+3.3V (VTR)" Ta "uV" Ta "Voltage" 53.It Li "+3V (Vbat)" Ta "uV" Ta "Voltage" 54.El 55.Pp 56.Nm 57provides the standard 58.Xr watchdog 4 59interface and may be used with 60.Xr watchdogd 8 . 61The watchdog timer may be configured to a value from 1 second to 255 62minutes. 63The watchdog timer has a resolution of 1 second in the timeout interval 641 to 255 seconds. 65Outside this interval, the resolution is 1 minute. 66.Pp 67Note that the pin used for signalling the timer expiration is 68configurable and may on some boards be intended for other uses than this. 69Because of this, the chip may not by default be configured to use the 70pin for watchdog operation. 71To force the 72.Nm 73device to use the pin for watchdog operation, the driver may be 74configured with an 75.Xr autoconf 9 76.Ar flags 77setting of 0x0001. 78.Sh SEE ALSO 79.Xr intro 4 , 80.Xr isa 4 , 81.Xr watchdog 4 , 82.Xr sensorsd 8 , 83.Xr sysctl 8 , 84.Xr watchdogd 8 , 85.Xr autoconf 9 86.Sh HISTORY 87The 88.Nm 89driver first appeared in 90.Ox 4.5 . 91.Sh AUTHORS 92The 93.Nm 94driver was written by 95.An Michael Knudsen Aq Mt mk@openbsd.org . 96