linux-kernel - Re: [PATCH v2 2/2] iio:adc:at91-sama5d2: add support for signed conversion

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Message-ID: <56DDDEBF.30905@metafoo.de>
Date:	Mon, 7 Mar 2016 21:04:15 +0100
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	Ludovic Desroches <ludovic.desroches@...el.com>, jic23@...nel.org
Cc:	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, nicolas.ferre@...el.com
Subject: Re: [PATCH v2 2/2] iio:adc:at91-sama5d2: add support for signed
 conversion

On 03/07/2016 03:29 PM, Ludovic Desroches wrote:
> The at91-sama5d2 ADC controller can achieve unsigned and signed
> conversions. For each channel, a signed and an unsigned variant are
> created.
> Sign mode is a global configuration, it is not tied to a specific
> channel. For this reason, the controller has to be configured upon
> conversion request.

So, what's the difference between signed and unsigned mode?