linux-kernel - Re: [PATCH v3 1/2] iio: adc: driver for ti adc081s/adc101s/adc121s

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Message-ID: <3ae9e7ba-9107-86fa-12f0-33226226a0ab@metafoo.de>
Date:   Fri, 26 Jan 2018 19:29:39 +0100
From:   Lars-Peter Clausen <lars@...afoo.de>
To:     Andy Shevchenko <andy.shevchenko@...il.com>,
        Milan Stevanovic <milan.o.stevanovic@...il.com>
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Peter Meerwald <pmeerw@...erw.net>, linux-iio@...r.kernel.org,
        Philippe Ombredanne <pombredanne@...b.com>
Subject: Re: [PATCH v3 1/2] iio: adc: driver for ti adc081s/adc101s/adc121s

On 01/26/2018 07:25 PM, Lars-Peter Clausen wrote:
> On 01/26/2018 07:19 PM, Andy Shevchenko wrote:
>> On Sun, Jan 14, 2018 at 10:32 PM, Milan Stevanovic
>> <milan.o.stevanovic@...il.com> wrote:
>>>     Add Linux device driver for TI single-channel CMOS
>>>     8/10/12-bit analog-to-digital converter with a
>>>     high-speed serial interface.
>>>
>>> Signed-off-by: Milan Stevanovic <milan.o.stevanovic@...il.com>
>>
>>> + * Analog Devices AD7466/7/8 AD7476/5/7/8 (A) SPI ADC driver
>>> + * TI ADC081S/ADC101S/ADC121S 8/10/12-bit SPI ADC driver
>>
>> Guys, I'm not sure I understood this mix.
> 
> You often have the case where two or even more vendors produce parts that
> are (mostly) pin and register map compatible. This is typically to fulfill
> the second source requirement that some customers have.
> 
> It is not uncommon to see drivers that support parts from different vendors.

And I should probably add that this driver is for devices which are single
channel ADCs with a SPI interface and no configuration registers. There are
only so many ways to implement this (And I ensure you hardware designers
will definitely create implementations of all of those limited ways), so
there will probably be overlap between vendors.

- Lars