Kernel driver `lm75.o'
=====================

Status: Complete and well-tested

Supported chips: 
  * National Semiconductors LM75
    Prefix: `lm75'
    Addresses scanned: I2C 0x48 - 0x4f (inclusive)
    Datasheet: Publicly available at the National Semiconductors website

Author: Frodo Looijaard <frodol@dds.nl>


Module Parameters
-----------------

* force: short array (min = 1, max = 48)
  List of adapter,address pairs to boldly assume to be present
* force_lm75: short array (min = 1, max = 48)
  List of adapter,address pairs which are unquestionably assumed to contain
  a `lm75' chip
* ignore: short array (min = 1, max = 48)
  List of adapter,address pairs not to scan
* ignore_range: short array (min = 1, max = 48)
  List of adapter,start-addr,end-addr triples not to scan
* probe: short array (min = 1, max = 48)
  List of adapter,address pairs to scan additionally
* probe_range: short array (min = 1, max = 48)
  List of adapter,start-addr,end-addr triples to scan additionally


Description
-----------

The LM75 implements one temperature sensor. Limits can be set through the
Overtemperature Shutdown register and Hysteris register. Each value can be 
set and read to half-degree accuracy.
An alarm is issued (usually to a connected LM78) when the temperature
gets higher then the Overtemperature Shutdown value; it stays on until
the temperature falls below the Hysteris value.
All temperatures are in degrees Celcius, and are guaranteed within a 
range of -55 to +125 degrees.

The LM75 only updates its values each 1.5 seconds; reading it more often
will do no harm, but will return 'old' values.

The LM75 is usually used in combination with LM78-like chips, to measure
the temperature of the processor(s).


Chip Features
-------------

Chip `lm75'
          LABEL     LABEL CLASS   COMPUTE CLASS ACCESS MAGNITUDE
           temp            NONE            NONE      R     1
      temp_hyst            temp            temp      RW    1
      temp_over            temp            temp      RW    1

          LABEL                           FEATURE SYMBOL     SYSCTL FILE:OFFSET
           temp                        SENSORS_LM75_TEMP            temp:3
      temp_hyst                   SENSORS_LM75_TEMP_HYST            temp:2
      temp_over                   SENSORS_LM75_TEMP_OVER            temp:1


