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Date:   Wed, 20 Feb 2019 11:22:34 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Himanshu Jha <himanshujha199640@...il.com>
Cc:     Mike Looijmans <mike.looijmans@...ic.nl>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net,
        dpfrey@...il.com, colin.king@...onical.com
Subject: Re: [PATCH] iio/chemical/bme680: Fix SPI read interface

..

> > Report temperature in millidegrees Celcius instead of degrees.  
> 
> Jonathan, I didn't know about this but is there any rationale to report
> in millidegress ?

Misguided attempt in the early days of IIO to match hwmon units.
Sadly it is now the ABI and hence 'unfixable'. Same odd units
for voltage and current + a few others that date back to those
days.   A big oops.  There are some other non obvious bits and
pieces so should always check the ABI docs which should be near
complete.
 
> 
> I was under the impression that degC is the standard and you would
> always want you Fitbit/Smart watch to report in degC. Ofcourse,
> userspace program can convert millideg -> degC

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