Kernel driver `ds1621.o'
=====================

Status: Complete and tested, alarms experimental

Supported chips: 
  * Dallas Semiconductor DS1621
    Prefix: `ds1621'
    Addresses scanned: I2C 0x48 - 0x4f (inclusive)
    Datasheet: Publicly available at the Dallas Semiconductor website
               http://www.dalsemi.com

Author: Christian W. Zuckschwerdt <zany@triq.net>


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

* force: short array (min = 1, max = 48)
  List of adapter,address pairs to boldly assume to be present
* force_ds1621: short array (min = 1, max = 48)
  List of adapter,address pairs which are unquestionably assumed to contain
  a `ds1621' 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 DS1621 implements one temperature sensor. Limits can be set through the
Overtemperature register and Hysteresis register. Each value can be 
set and read to half-degree accuracy.
An alarm is issued when the temperature gets higher then the Overtemperature
value; or drops below the Hysteresis value.

It stays on until reset by the kernel module.

All temperatures are in degrees Celcius, and are guaranteed within a 
range of -55 to +125 degrees.

The DS1621 supplies the temperature data in a format common with chips
like the LM75, LM77 and DS75, DS1775.
While the DS1621 has three additional bits of accuracy
(12 vs. 9 for the LM75), the additional bits are not supported.


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

Chip `ds1621'
          LABEL     LABEL CLASS   COMPUTE CLASS ACCESS MAGNITUDE
           temp            NONE            NONE      R     1
      temp_hyst            temp            temp      RW    1
      temp_over            temp            temp      RW    1
         alarms            NONE            NONE      R     0

          LABEL                           FEATURE SYMBOL     SYSCTL FILE:OFFSET
           temp                      SENSORS_DS1621_TEMP            temp:3
      temp_hyst                 SENSORS_DS1621_TEMP_HYST            temp:2
      temp_over                 SENSORS_DS1621_TEMP_OVER            temp:1
         alarms                    SENSORS_DS1621_ALARMS          alarms:1
