LM83 support

[mds@paradyne.com (Mark D. Studebaker )]

agreed that a separate driver for lm83 is best, and that
eventually adm1023 support should be moved out of adm1021.

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Also, if you ever have a chance to see Bob Pease on his lecture tour 
don't miss it...

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Jean Delvare wrote:
>>I would recommend extending the adm1021 driver.  It's a relatively 
>>simple driver and not nearly as complex as the w83781d.  And the 
>>supported chips have fewer differences.
> 
> 
> After taking a look at the code, I had come to the opposite conclusion.
> The adm1021 driver handles only 2 temperature sensors while the LM83
> specificity is that it has 4 temperature sensors. If we are to limit the
> LM83 to 2 temperature readings, then it becomes a LM84 that is already
> supported. And changing the adm1021 driver code to support 4 temperature
> sensors probably makes no sense. So I was planing to write a new driver
> for the LM83.
> 
> Wether or not existing support should then be moved from adm1021 to lm83
> could be discussed later (although my arguments right above make it
> quite obvious that older chipsets should be kept supported by adm1021).
> 
> 
>>You should probably look at modularizing the extended features
>>somewhat. 
>>  You can look at my lm85.c driver for an example.
> 
> 
> I'll take a look at the code and see if it can change my mind. As said
> in a previous post, I never write a driver myself so my opinion may not
> be the wisest.
> 
> One thing that should be taken into account however is the fact that the
> adm1021 driver already supports 8 devices, which is our current max.
> Adding a ninth chipset to this driver would introduce (again)
> incompatibilities.
>