linux-kernel - Re: [PATCHv6 1/4] iio: adc: exynos_adc: Add exynos_adc

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Date:	Fri, 18 Jul 2014 13:16:53 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Naveen Krishna Ch <naveenkrishna.ch@...il.com>
Cc:	Chanwoo Choi <cw00.choi@...sung.com>, jic23@...nel.org,
	My self <ch.naveen@...sung.com>,
	Kukjin Kim <kgene.kim@...sung.com>, robh+dt@...nel.org,
	pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	rdunlap@...radead.org, kyungmin.park@...sung.com,
	t.figa@...sung.com, linux-iio@...r.kernel.org,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>, linux-kernel@...r.kernel.org,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>, devicetree@...r.kernel.org,
	linux-doc@...r.kernel.org
Subject: Re: [PATCHv6 1/4] iio: adc: exynos_adc: Add exynos_adc_data structure to improve readability

On Friday 18 July 2014 15:41:27 Naveen Krishna Ch wrote:
> >
> >         {
> >                 .name           = "s3c24xx-adc",
> >                 .driver_data    = TYPE_ADCV1,
> >         }, {
> >                 .name           = "s3c2443-adc",
> >                 .driver_data    = TYPE_ADCV11,
> >         }, {
> >                 .name           = "s3c2416-adc",
> >                 .driver_data    = TYPE_ADCV12,
> >         }, {
> >                 .name           = "s3c64xx-adc",
> >                 .driver_data    = TYPE_ADCV2,
> >         }, {
> >                 .name           = "samsung-adc-v3",
> >                 .driver_data    = TYPE_ADCV3,
> >         }
> >
> > Where TYPE_ADCV3 seems to be the same as the new ADC_V1 used in this
> > driver. Do you have an explanation for that?
> 
> As per suggestion from Doug Anderson,
> I've implemented IIO based ADC driver to work with Exynos5250.
> keeping the plat-samsung/adc.c unchanged.
> 
> Assuming Exynos5250 is the one using the driver for the first time.
> i've named it v1 and so on.
> 
> Now, This seems to cause a lot of confusion.

Ah, so the version numbers don't come from Samsung hardware
documents but are just counting the versions we have drivers
for?

In this case, I guess using the first SoC that had a particular
version would have been better, and we should probably do that
when we add support for the older hardware in this driver.

	Arnd
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