lm(4) - NetBSD Manual Pages

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LM(4)                   NetBSD Kernel Interfaces Manual                  LM(4)


NAME

     lm - National Semiconductor LM78, LM79 and compatible hardware monitors


SYNOPSIS

     lm0 at isa? port 0x290


DESCRIPTION

     The lm driver provides support for the National Semiconductor LM series
     hardware monitors and register compatible chips to be used with the
     envsys(4) API.

     Most supported devices possess 11 sensors:

           Sensor    Units    Typical Use
           IN0       uV DC    Core voltage
           IN1       uV DC    unknown
           IN2       uV DC    +3.3V
           IN3       uV DC    +5V
           IN4       uV DC    +12V
           IN5       uV DC    -12V
           IN6       uV DC    -5V
           Temp      uK       Motherboard Temperature
           Fan0      RPM      Fan
           Fan1      RPM      Chassis Fan
           Fan2      RPM      Fan
     for some devices (most Winbond devices) sensors names and numbers will be
     different.

     Sensor names as well as nominal RPMs for fans 0 and 1 may be changed
     through the ENVSYS_STREINFO ioctl(2).

     Due to hardware limitations, fresh sensor data is only available every
     1.5 seconds.


HARDWARE

     Chips supported by the lm driver include:

           National Semiconductor LM78 and LM78-J

           National Semiconductor LM79

           Winbond W83697HF (untested)

           Winbond W83627HF, W83781D and W83782D


SEE ALSO

     envsys(4), envstat(8)


HISTORY

     The lm device appeared in NetBSD 1.5.


BUGS

     Interrupt support is unimplemented.

     There are currently no known pnpbios IDs assigned to LM chips.

NetBSD 2.0                     February 26, 2000                    NetBSD 2.0