Re: [PATCH v3] hwmon: (lm90) Add support for update_interval sysfs attribute

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On Thu, 7 Oct 2010 07:14:08 -0700, Guenter Roeck wrote:
> Hi Jean,
> 
> On Thu, Oct 07, 2010 at 05:28:03AM -0400, Jean Delvare wrote:
> 
> [ ... ]
> 
> > This is smart :) I like it a lot. Just not sure why you limited the
> > shift to 2 bits, shifting by say 6 bits would guarantee that future
> > devices supporting greater values for the conversion rate register
> > (up tp 13) would be supported out of the box.
> > 
> I ran test code for all supported values, and found that shift by 2 
> was sufficient. It can always be changed if someone ever comes up with
> a sensor supporting even higher resolution. Call me minimalist ...

My point was that shifting by 6 doesn't cost more than shifting by 2.

> > Also note that you may want to use DIV_ROUND_CLOSEST() to make the code
> > slightly easier to read.
> > 
> Yes, that would be cleaner for the final interval calculation.
> Want me to change it and send out another revision ?

As you wish, I am fine either way.

> > But anyway, your code works just fine for the devices currently
> > supported, so I can apply the patch as is. I tested the resulting
> > driver on my ADM1032 evaluation board and everything went fine. Thanks
> > for your contribution!
> > 
> Thanks a lot for reviewing it!

You're welcome.

-- 
Jean Delvare

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