Re: [PATCH] hwmon: Add support for max6695 and max6696 to lm90 driver

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On Wed, Sep 08, 2010 at 11:29:02AM -0400, Jean Delvare wrote:
> On Wed, 8 Sep 2010 06:56:54 -0700, Guenter Roeck wrote:
> > Too bad - registers 0x16 and 0x17 exist on both 6658 and 6659. So the only way to detect 6659 
> > would be the address (0x4d or 0x4e), and we would mis-detect it on 0x4c. Is that worth it ?
> 
> I'd say adding support for the MAX6659 is worth it. Just don't add
> detection. That is, all of MAX6657, 6658 and 6658 should be detected as
> max6657, which has the minimum set of features. But if someone declares
> a "max6659" device either as part of the platform data or from
> user-space, then the driver should expose all the chip features.
> 
> Deal?
> 
I'd say yes, but then we would deliberately mis-detect the 6659 on address 0x4d and 0x4e,
which kind of hurts my consciousness. 

How about a middle ground - mis-detect it on address 0x4c, but detect it correctly
on 0x4d and 0x4e ? Should be ok if we add a note into the file and into the documentation,
and we would do as good as we can.

Guenter

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