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From: Lars-Peter Clausen <lars-Qo5EllUWu/uELgA04lAiVw@public.gmane.org>
To: Matt Ranostay <mranostay-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	Jonathan Cameron <jic23-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Peter Meerwald <pmeerw-jW+XmwGofnusTnJN9+BGXg@public.gmane.org>,
	"open list:IIO SUBSYSTEM AND..."
	<linux-iio-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	open list <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	"open list:OPEN FIRMWARE AND..."
	<devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	George McCollister
	<george.mccollister-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Re: [RFC v2 4/4] iio: chemical: add SGX VZ89x VOC sensor support
Date: Mon, 07 Sep 2015 10:08:42 +0200	[thread overview]
Message-ID: <55ED460A.1080706@metafoo.de> (raw)
In-Reply-To: <CAKzfze8sEkr5q6-X42Z24nqrqy8JMdqL3omRKOraz1G0BehyJg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>

On 09/07/2015 06:27 AM, Matt Ranostay wrote:
> Thinking this over do we needed a IIO_CHAN_INFO_PROCESSED_OFFSET to
> signal that it needs to be after the (value - offset) * scale
> calculation?

Well, value * scale + offset = (value + offset/scale) * scale. So just scale
your offset inversely to the scale.

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      parent reply	other threads:[~2015-09-07  8:08 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-09-07  2:39 [RFC v2 0/4] iio: new chemical sensor framework and channel types Matt Ranostay
2015-09-07  2:39 ` [RFC v2 1/4] iio: chemical: Add IIO_CONCENTRATION channel type Matt Ranostay
     [not found] ` <1441593547-10896-1-git-send-email-mranostay-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-09-07  2:39   ` [RFC v2 2/4] iio: resistance: add IIO_RESISTANCE " Matt Ranostay
2015-09-07  2:39   ` [RFC v2 3/4] devicetree: add SGX Sensortech vendor id Matt Ranostay
2015-09-07  2:39 ` [RFC v2 4/4] iio: chemical: add SGX VZ89x VOC sensor support Matt Ranostay
     [not found]   ` <CAFSKS=NvhBvwknAXs-Pfd-bJ4U6zrXD3zBZT0GaC+w5JUg24ig@mail.gmail.com>
     [not found]     ` <CAFSKS=NvhBvwknAXs-Pfd-bJ4U6zrXD3zBZT0GaC+w5JUg24ig-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-09-07  4:20       ` Matt Ranostay
     [not found]         ` <CAKzfze_UBjKauqqCLDSkUu-ee+ZC0VzQCaYpZEgpfRny_H4y1A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-09-07  4:27           ` Matt Ranostay
     [not found]             ` <CAKzfze8sEkr5q6-X42Z24nqrqy8JMdqL3omRKOraz1G0BehyJg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-09-07  8:08               ` Lars-Peter Clausen [this message]

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