linux-kernel - Re: [PATCH 0/2] Drop BU27008 and BU27010

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Message-ID: <66cb5639-550b-4c00-9b90-b58dcd09405d@gmail.com>
Date: Sat, 30 Nov 2024 16:53:55 +0200
From: Matti Vaittinen <mazziesaccount@...il.com>
To: Jonathan Cameron <jic23@...nel.org>
Cc: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>,
 Lars-Peter Clausen <lars@...afoo.de>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Javier Carrasco <javier.carrasco.cruz@...il.com>,
 Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
 Arthur Becker <arthur.becker@...tec.com>,
 Emil Gedenryd <emil.gedenryd@...s.com>, Marek Vasut <marex@...x.de>,
 Mudit Sharma <muditsharma.info@...il.com>,
 Subhajit Ghosh <subhajit.ghosh@...aklogic.com>, linux-iio@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] Drop BU27008 and BU27010

On 30/11/2024 16:38, Jonathan Cameron wrote:
> On Thu, 28 Nov 2024 21:34:54 +0200
> Matti Vaittinen <mazziesaccount@...il.com> wrote:
> 
>> Drop the support for ROHM BD72008 and BD72010 RGB sensors
>>
>> I accidentally hit a BU27008 data-sheet which had a big red text saying
>> "Obsolete". After a few queries I received a word that the ROHM BU27008
>> and BU27010 RGB sensors were cancelled and never entered mass production.
>> Supporting not existing hardware makes no sense, so it's probably best
>> to drop the drivers and dt-bindings.
>>
>> There is still a RGB sensor from ROHM called BU27006.
>> https://www.rohm.com/products/sensors-mems/color-sensor-ics/bu27006muc-z-product
>> Based on a quick glance this should be very similar to the BU27010. If
>> someone wants to create a driver for this, then the bu27008.c might be
>> worth looking at.
>>
>> As writing of this I don't have the BU27006 at my hands, and when I
>> asked about creating a driver for this IC from the HQ ... I got an
>> impression that at the moment ROHM rather pays me for doing something
>> else. So, currently I have no plan to add support for the BD27006.
>> We can always dig the bu27008.c from the depths of the git, if it later
>> appears such a driver would be a good idea.
> 
> Applied.  I'm not going to rush it in because a driver for hardware
> that no one has is not really a problem as long as no one does any more
> work on it.  So queued up in my testing branch which will go upstream
> next merge cycle.

Thanks. This makes perfect sense, and I didn't expect them to go in 
sooner :)

> You have my sympathies wrt to wasted work!

It indeed hurts. You do always hope things you tinker with would be 
useful. Well, not the first cancelled product I am working with - and I 
believe not a last one either...

Yours,
	-- Matti