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

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Date:   Fri, 26 Jan 2018 19:34:45 +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>,
        Matt Ranostay <mranostay@...il.com>
Subject: Re: [PATCH v3 1/2] iio: adc: driver for ti adc081s/adc101s/adc121s

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.
> 
> We have like few TI drivers here:
> 
> drivers/iio/adc/ti-adc0832.c:352:module_spi_driver(adc0832_driver);
> drivers/iio/adc/ti-adc084s021.c:269:module_spi_driver(adc084s021_driver);
> drivers/iio/adc/ti-adc108s102.c:343:module_spi_driver(adc108s102_driver);
> drivers/iio/adc/ti-adc12138.c:547:module_spi_driver(adc12138_driver);
> drivers/iio/adc/ti-adc128s052.c:211:module_spi_driver(adc128_driver);
> drivers/iio/adc/ti-adc161s626.c:276:module_spi_driver(ti_adc_driver);
> drivers/iio/adc/ti-ads7950.c:519:module_spi_driver(ti_ads7950_driver);
> drivers/iio/adc/ti-ads8688.c:481:module_spi_driver(ads8688_driver);
> drivers/iio/adc/ti-tlc4541.c:266:module_spi_driver(tlc4541_driver);
> 
> What's wrong with them?
> 
> Is it here code duplication between two vendors?
> 

Looking at this list ti-adc161s626 could probably be combined with the
ad7476 driver. It fits the bill, single channel ADC with SPI interface and
no control registers.