linux-kernel - Re: [PATCH v3 2/5] ARM: dts: add reference voltage property for MXS LRADC

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Message-Id: <201307230006.53434.marex@denx.de>
Date:	Tue, 23 Jul 2013 00:06:53 +0200
From:	Marek Vasut <marex@...x.de>
To:	"Lars-Peter Clausen" <lars@...afoo.de>
Cc:	Hector Palacios <hector.palacios@...i.com>,
	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree-discuss@...ts.ozlabs.org,
	alexandre.belloni@...e-electrons.com, jic23@...nel.org,
	fabio.estevam@...escale.com,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Subject: Re: [PATCH v3 2/5] ARM: dts: add reference voltage property for MXS LRADC

Dear Lars-Peter Clausen,

> On 07/22/2013 04:04 PM, Hector Palacios wrote:
> > Some LRADC channels have fixed pre-dividers so they can measure
> > different voltages at full scale. The reference voltage allows to
> > expose a scaling attribute through the IIO sysfs so that a user can
> > compute the real voltage out of a measured sample value.
> 
> I've said before that I'm not convinced that this is the right way to
> implement this. And considering what Thomas said here
> http://www.mail-archive.com/devicetree-discuss@lists.ozlabs.org/msg36691.ht
> ml I guess I'm not alone with that opinion.
> 
> - Lars

He's talking about different versions of the IP block, this is the same IP 
block, just connected to different inputs.

Best regards,
Marek Vasut
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