linux-kernel - Re: [PATCH 1/2] HID: hid-lg4ff add support for G27 LEDs

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Date:	Tue, 13 Mar 2012 09:23:53 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	simon@...gewell.org
Cc:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	Michael Bauer <michael@...auer.org>,
	Michal Maly <madcatxster@...il.com>
Subject: Re: [PATCH 1/2] HID: hid-lg4ff add support for G27 LEDs

On Mon, 12 Mar 2012, simon@...gewell.org wrote:

> >> The LEDs on the G27 are very much more specific, mounted on the yoke of
> >> the gaming wheel.
> >
> >> Would this require the use/complexity of the LED subsystem?
> >
> > Well, it'd mean that applications that know how to drive LEDs will be
> > able to use the LEDs on this wheel with less per device knowledge which
> > seems like a useful thing and if someone wants to remap a LED to "new
> > mail" or whatever that'll be easier (nethack has the mailer daemon
> > deliver a scroll of mail!).
> 
> I'm not familiar with the LED subsystem, but my concerns would be that
> this would add a whole load of code to implement.

Not really, it's rather simple to use and as Mark said, it's a proper 
infrastructure to use here.

We already have HID drivers which are using this -- you can look at 
PicoLCD or Wiimote drivers and you'll see that it's indeed fairly simple.

> PS. I don't really care about email when screaming around Laguna Seca ;-)

:))

-- 
Jiri Kosina
SUSE Labs
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