Module Name: src
Committed By: jdc
Date: Sun Jan 3 17:27:39 UTC 2016
Modified Files:
src/share/man/man4: admtemp.4
Log Message:
Mention supported chips and their differences.
Mention display and setting of chip temperature limits.
To generate a diff of this commit:
cvs rdiff -u -r1.4 -r1.5 src/share/man/man4/admtemp.4
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/share/man/man4/admtemp.4
diff -u src/share/man/man4/admtemp.4:1.4 src/share/man/man4/admtemp.4:1.5
--- src/share/man/man4/admtemp.4:1.4 Tue Mar 18 18:20:39 2014
+++ src/share/man/man4/admtemp.4 Sun Jan 3 17:27:39 2016
@@ -1,4 +1,4 @@
-.\" $NetBSD: admtemp.4,v 1.4 2014/03/18 18:20:39 riastradh Exp $
+.\" $NetBSD: admtemp.4,v 1.5 2016/01/03 17:27:39 jdc Exp $
.\"
.\" $OpenBSD: admtemp.4,v 1.8 2007/05/31 19:19:48 jmc Exp $
.\"
@@ -16,7 +16,7 @@
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
-.Dd October 29, 2008
+.Dd December 31, 2015
.Dt ADMTEMP 4
.Os
.Sh NAME
@@ -29,16 +29,44 @@ The
.Nm
driver provides support for the Analog Devices ADM1021,
Analog Devices ADM1023, Analog Devices ADM1032, Genesys Logic GL523SM,
-Global Mixed-mode Technology G781, Maxim 1617, and Xeon embedded
-temperature sensors.
-The device possesses internal and external temperature sensors.
-These values are made available through the
-.Xr envstat 8
-interface.
+Global Mixed-mode Technology G781, Texas Instruments LM84, Maxim 1617,
+Maxim 1617A, Philips Semiconductors NE1617A, and Xeon embedded temperature
+sensors.
+The device possesses internal and external temperature sensors, and
+programmable low and high temperature limits, with a temperature range of
+-65 to +127 degC and a resolution of 1 degC.
.Pp
On i386 machines, this driver also supports the Xeon embedded
I2C temperature probes.
In this case, however, only one temperature value is provided.
+.Pp
+Exceeding the temperature limits causes the device to assert an Alarm signal,
+which can be used by other hardware to detect critical conditions.
+.Pp
+Some sensors differ from the ADM1021, MAX1617 and NE1617A:
+.Bl -item -offset indent
+.It
+The ADM1021A, ADM1023, ADM1032, and G781 have a temperature range of 0 to
++127 degC and a resolution of 1 degC.
+.It
+The LM84 has no low temperature limits.
+.It
+The ADM1023, ADM1032, and G781 have extended precision remote temperature
+sensors, with a range of 0 to +127.875 degC and a resolution of 0.125 degC.
+.It
+The ADM1032 and G781 have additional high temperature limits with a range of
+0 to +127 degC and a resolution of 1 degC.
+If these are exceeded, a separate Therm signal is asserted.
+.El
+.Pp
+The sensor and limit values are made available through the
+.Xr envstat 8
+interface.
+For devices without additional high temperature limits, the limits that are
+displayed and set are the critical limits.
+For devices with additional high temperature limits, high and low temperature
+warning limits and high temperature critical limits are displayed and can be
+set.
.Sh SEE ALSO
.Xr iic 4 ,
.Xr intro 4 ,
@@ -49,3 +77,10 @@ The
.Nm
driver was written by
.An Theo de Raadt Aq Mt dera...@openbsd.org .
+Extended precision temperatures, and limit display and setting were added by
+.An Julian Coleman Aq Mt jcole...@netbsd.org .
+.Sh BUGS
+Limit sensors occasionally read as 0xff.
+If this occurs, the
+.Nm
+driver will ignore that limit.
