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Message-ID: <bd6d6cc0-4e70-fa31-4b5e-e6bcddf62d36@ideasonboard.com>
Date:   Wed, 18 Jan 2023 19:28:20 +0200
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Subject: Re: [PATCH v7 0/7] i2c-atr and FPDLink
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To:     Andy Shevchenko <andriy.shevchenko@intel.com>
Cc:     linux-media@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Wolfram Sang <wsa@kernel.org>,
        Luca Ceresoli <luca.ceresoli@bootlin.com>,
        Matti Vaittinen <Matti.Vaittinen@fi.rohmeurope.com>,
        Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Peter Rosin <peda@axentia.se>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Mark Brown <broonie@kernel.org>,
        Sakari Ailus <sakari.ailus@linux.intel.com>,
        Michael Tretter <m.tretter@pengutronix.de>,
        Shawn Tu <shawnx.tu@intel.com>,
        Hans Verkuil <hverkuil@xs4all.nl>,
        Mike Pagano <mpagano@gentoo.org>,
        =?UTF-8?Q?Krzysztof_Ha=c5=82asa?= <khalasa@piap.pl>,
        Marek Vasut <marex@denx.de>
References: <20230118124031.788940-1-tomi.valkeinen@ideasonboard.com>
 <Y8gX0krXayfOa4Hi@smile.fi.intel.com>
From:   Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
In-Reply-To: <Y8gX0krXayfOa4Hi@smile.fi.intel.com>
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On 18/01/2023 18:01, Andy Shevchenko wrote:
> On Wed, Jan 18, 2023 at 02:40:24PM +0200, Tomi Valkeinen wrote:
>> Hi,
>>
>> You can find the v6 from:
>>
>> https://lore.kernel.org/all/20230105140307.272052-1-tomi.valkeinen@ideasonboard.com/
>>
>> Main changes:
>>
>> * i2c-atr: Use bus notifier. This allows us to drop the patch that adds
>>    the attach_client/detach_client callbacks. On the downside, it removes
>>    the option for error handling if the translation setup fails, and also
>>    doesn't provide us the pointer to the i2c_board_info. I belive both
>>    are acceptable downsides.
>>
>> * Use fwnode in the fpdlink drivers instead of OF
>>
>> * Addressed all the review comments (I hope)
>>
>> * Lots of cosmetic or minor fixes which I came up while doing the fwnode
>>    change
> 
> I believe my comments to the first driver applies to the next two, so please
> address them whenever you are agree / it's possible / it makes sense.
> 
> About ATR implementation. We have the i2c bus (Linux representation of
> the driver model) and i2c_adapter and i2c_client objects there. Can't we
> have an i2c_client_aliased in similar way and be transparent with users?

Can you clarify what you mean here?

The i2c_clients are not aware of the i2c-atr. They are normal i2c 
clients. The FPD-Link drivers are aware of the ATR, as the FPD-Link 
hardware contains the ATR support.

  Tomi