linux-kernel - Re: [PATCH v2 3/3] backlight: tdo24m: add model and status sysfs entries

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Date:   Sat, 16 Dec 2017 12:40:55 +0100
From:   Robert Jarzmik <robert.jarzmik@...e.fr>
To:     Daniel Thompson <daniel.thompson@...aro.org>
Cc:     Lee Jones <lee.jones@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/3] backlight: tdo24m: add model and status sysfs entries

Daniel Thompson <daniel.thompson@...aro.org> writes:

> On Fri, Oct 13, 2017 at 09:42:49PM +0200, Robert Jarzmik wrote:
>> Add entries to query the panel ASIC to acquire the model number and the
>> status field. This comes in handy to check that the SPI connection is
>> functional and that the panel's firmware is alive.
>> 
>> Signed-off-by: Robert Jarzmik <robert.jarzmik@...e.fr>
>
> This feels to me somewhat like debug information being pushed into sysfs.
> There are very few backlight drivers that add additional sysfs attributes
> meaning the extra info here is not commonly pushed into the ABI for a
> backlight and knowing the info in these properties does not really 
> help userspace to *use* the hardware.
>
> Does this kind of thing really belong in sysfs?
Ok, as you wish. Let's drop this patch from the serie for now.

Cheers.

--
Robert