linux-kernel - Re: [RFCv3 2/6] i2c: add I2C Address Translator (ATR) support

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Message-ID: <9327df42-a4db-e2dc-b02f-0430310d551c@fi.rohmeurope.com>
Date:   Thu, 17 Feb 2022 05:12:14 +0000
From:   "Vaittinen, Matti" <Matti.Vaittinen@...rohmeurope.com>
To:     Luca Ceresoli <luca@...aceresoli.net>,
        Andy Shevchenko <andy.shevchenko@...il.com>
CC:     Linux Media Mailing List <linux-media@...r.kernel.org>,
        linux-i2c <linux-i2c@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Wolfram Sang <wsa@...-dreams.de>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Kieran Bingham <kieran.bingham@...asonboard.com>,
        Jacopo Mondi <jacopo@...ndi.org>,
        Vladimir Zapolskiy <vz@...ia.com>,
        Peter Rosin <peda@...ntia.se>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Subject: Re: [RFCv3 2/6] i2c: add I2C Address Translator (ATR) support

On 2/16/22 10:40, Luca Ceresoli wrote:
> On 08/02/22 12:16, Andy Shevchenko wrote:
>> On Mon, Feb 7, 2022 at 7:55 PM Luca Ceresoli <luca@...aceresoli.net> wrote:
>>> +config I2C_ATR
>>> +       tristate "I2C Address Translator (ATR) support"
>>> +       help
>>> +         Enable support for I2C Address Translator (ATR) chips.
>>> +
>>> +         An ATR allows accessing multiple I2C busses from a single
>>> +         physical bus via address translation instead of bus selection as
>>> +         i2c-muxes do.
>>
>> What would be the module name?
> 
> Isn't the module name written in Kconfig files just to avoid checkpatch
> complain about "too few doc lines"? :) Oook, it's i2s-atr anyway.

Thanks Luca! I have always wondered why people keep adding this 
seemingly unnecessary boilerplate. Now I finally get the purpose!

--Matti

-- 
The Linux Kernel guy at ROHM Semiconductors

Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

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