linux-kernel - Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led: ledtrig-transient: add support for hrtimer

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Message-ID: <20170920112940.GB4283@amd>
Date:   Wed, 20 Sep 2017 13:29:40 +0200
From:   Pavel Machek <pavel@....cz>
To:     Jacek Anaszewski <jacek.anaszewski@...il.com>
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        "linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
        David Lin <dtwlin@...gle.com>,
        Jonathan Corbet <corbet@....net>,
        Richard Purdie <rpurdie@...ys.net>,
        Hans de Goede <hdegoede@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh@...nel.org>,
        Rom Lemarchand <romlem@...gle.com>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        "linux-leds@...r.kernel.org" <linux-leds@...r.kernel.org>
Subject: Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:
 ledtrig-transient: add support for hrtimer

> >>> I'd leave the decision to the user. We could add a note to the
> >>> Documentation/leds/ledtrig-transient.txt that force feedback interface
> >>> should be preferable choice for driving vibrate devices.
> >>> However only if following conditions are met:
> >>
> >> What I meant is that it is my decision, as a LED subsystem maintainer,
> >> to accept the addition of a note about some other subsystem offering
> >> an equivalent or even better substitute of the feature being available
> >> in the subsystem I am responsible for. And I will accept such a patch
> >> only if mentioned conditions are met.
> > 
> > Having the wording in documentation does not in any way stops Android
> > folks from continuing [ab]using the transient trigger. But this is
> > their choice. The purpose of documentation is to document the best
> > practices, not all possible crazy solutions one can come up with.
> 
> Yes. but if the information has been in place for years, we can't
> just remove it without giving an instruction on how to use the
> substitute.

I gave you information how to use the substitute.

I already suggested patch to documentation. If you do the same, maybe
we can agree on documentation update.

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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