linux-kernel - Re: [PATCH v5 3/3] platform/chrome: Standardize Chrome OS keyboard backlight name

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Date:   Thu, 4 Apr 2019 11:55:27 -0700
From:   Dmitry Torokhov <dtor@...gle.com>
To:     Nick Crews <ncrews@...omium.org>
Cc:     Guenter Roeck <groeck@...gle.com>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Benson Leung <bleung@...omium.org>, linux-leds@...r.kernel.org,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Pavel Machek <pavel@....cz>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        linux-rtc@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Duncan Laurie <dlaurie@...omium.org>,
        Simon Glass <sjg@...gle.com>
Subject: Re: [PATCH v5 3/3] platform/chrome: Standardize Chrome OS keyboard
 backlight name

On Thu, Apr 4, 2019 at 11:41 AM Nick Crews <ncrews@...omium.org> wrote:
>
> On Thu, Apr 4, 2019 at 11:43 AM Dmitry Torokhov <dtor@...gle.com> wrote:
> >
> > On Thu, Apr 4, 2019 at 10:36 AM Guenter Roeck <groeck@...gle.com> wrote:
> > >
> > > On Thu, Apr 4, 2019 at 10:11 AM Nick Crews <ncrews@...omium.org> wrote:
> > > >
> > > > We want all backlights for the system keyboard to
> > > > use a common name, so the name "platform::kbd_backlight"
> > > > would be better than the current "chromeos::kbd_backlight"
> > > > name. Normally this wouldn't be worth changing, but the new
> > > > Wilco keyboard backlight driver uses the "platform" name.
> > > > We want to make it so all Chrome OS devices are consistent,
> > > > so we'll change the name here too.
> > > >
> > >
> > > Wondering - who is the "we" you are talking about ?
>
> You're right, I should have been more precise.
> I was referring to Pavel, Enric, and myself. Pavel had this opinion here:
> https://lkml.org/lkml/2019/4/4/1040. I don't know what Pavel meant by "we"
> in that comment, but I would guess that could mean the other LED maintainers
> as well? I talked with Enric 1:1 and he didn't see the problem with changing it,
> though perhaps he was only considering our use of the LED via powerd,
> and not users in general. I'm guessing Pavel's and Enric's meanings though,
> excuse me if I am misinterpreting.
>
> >
> > This also has a potential of breaking existing setups if somebody did
> > happen to match on entire name instead of suffix. Such changes have to
> > be considered very carefully; at this point I am against of doing
> > this.
>
> Would it make sense to keep the old name as is, and only make the new
> Wilco name begin with "platform:"? What would you think is best?

Given that we do not have a single instance of platform::kbd_backlight
in kernel at this time I have no idea why Pavel is trying to push this
for Wilco driver.

Thanks.

-- 
Dmitry