linux-kernel - Re: [PATCH] input/spi: add ads7843 support to ads7846 touchscreen driver

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Message-Id: <200702191046.43909.david-b@pacbell.net>
Date:	Mon, 19 Feb 2007 10:46:43 -0800
From:	David Brownell <david-b@...bell.net>
To:	Nicolas Ferre <nicolas.ferre@....atmel.com>
Cc:	linux-kernel@...r.kernel.org,
	Patrice Vilchez <patrice.vilchez@....atmel.com>,
	Andrew Victor <andrew@...people.com>
Subject: Re: [PATCH] input/spi: add ads7843 support to ads7846 touchscreen driver

On Monday 19 February 2007 4:48 am, Nicolas Ferre wrote:
>   
> >> -	/* maybe off internal vREF */
> >> -	if (use_internal) {
> > 
> > This part doesn't make sense.  Could you say what you're trying
> > to do?  The ads7846 requres an external vREF.  Is the issue that
> > maybe the REF_OFF command isn't just turning off the (non-existent)
> > internal voltage reference?  If so the comments need updating, and
> > maybe the name REF_OFF needs to change too...
> 
> Well, on the ads7843, this command allow to put converter in low power
> mode and, more important, enable the PENIRQ (otherwise disabled).
> 
> The REF_OFF command can be replaced by the PWRDOWN one (exactly the
> same command). This last name matches better the ads7843
> datasheet description (and seems ok considering the ads7846 one).

OK, that would be a better change then, along with comment update.

- Dave

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